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<h3>

Simon Peyton Jones pushed to branch wip/T18300

at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>

</h3>

<h4>

Commits:

</h4>

<ul>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133">3ce29bdc</a></strong>

<div>

<span>by Simon Peyton Jones</span>

<i>at 2020-06-15T08:46:16+01:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Improve handling of data type return kinds

Following a long conversation with Richard, this patch tidies up the

handling of return kinds for data/newtype declarations (vanilla,

family, and instance).

I have substantially edited the Notes in TyCl, so they would

bear careful reading.

Fixes #18300.

In GHC.Tc.Instance.Family.newFamInst we were checking some

Lint-like properties with ASSSERT.  Instead I've added

Lint.lintAxiom, and called it from newFamInst.

The one new test, T18300, causes an ASSERT failure in HEAD.

</pre>

</li>

</ul>

<h4>14 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#6fcf64907fb5bdd93082d2d1eb94e4566e735865">

compiler/GHC/Core/DataCon.hs

</a>

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<li class="file-stats">

<a href="#91648438362e5a35363d2bb7abb04016dedd7d7e">

compiler/GHC/Core/FamInstEnv.hs

</a>

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<li class="file-stats">

<a href="#36a42448a83a9d1f6df8475f03ead2eed199dd8e">

compiler/GHC/Core/Lint.hs

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<li class="file-stats">

<a href="#4aad0050db1a8a20db8bbca149111de99cb299c9">

compiler/GHC/Core/TyCon.hs

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<a href="#9355bef855426caf5f526925edf351b20f9a86c4">

compiler/GHC/Tc/Gen/HsType.hs

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<li class="file-stats">

<a href="#07389a8f0516c26409d86f6bb651ed00759b5d4c">

compiler/GHC/Tc/Instance/Family.hs

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<li class="file-stats">

<a href="#e65390fa5a32c453a81a1c9a3e1c4464d155ca4a">

compiler/GHC/Tc/Module.hs

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<li class="file-stats">

<a href="#83d23a46bb6cdc8b1edc16f1fd2c8f5c53e2c9ca">

compiler/GHC/Tc/TyCl.hs

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<a href="#e63425e031ffe9350ee6b1687e506aaea75d11e1">

compiler/GHC/Tc/TyCl/Instance.hs

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<a href="#59d42d45d27a766c3ef299d73c226697153b7f6e">

compiler/GHC/Tc/Utils/Instantiate.hs

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<a href="#06c32582e3db8cd4d22527045923c480aab8dfbb">

<span class="new-file">

+

testsuite/tests/polykinds/T18300.hs

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<a href="#1b7bd6a45b74d0d2c4315fb30e7b443cb75d769c">

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+

testsuite/tests/polykinds/T18300.stderr

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<li class="file-stats">

<a href="#37bb83d0a916288b2296ba25cdbbef228eed6484">

testsuite/tests/polykinds/all.T

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<li class="file-stats">

<a href="#34fe7bf0e6fbf60effb28393399ba68666593909">

testsuite/tests/typecheck/should_compile/all.T

</a>

</li>

</ul>

<h4>Changes:</h4>

<li id="6fcf64907fb5bdd93082d2d1eb94e4566e735865">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#6fcf64907fb5bdd93082d2d1eb94e4566e735865"><strong>compiler/GHC/Core/DataCon.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="418" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -418,7 +418,7 @@ data DataCon</td>

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<pre style="margin: 0;"> <span id="LC418" class="line" lang="haskell">                <span class="c1" style="color: #998; font-style: italic;">-- NB: for a data instance, the original user result type may</span></span>

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<pre style="margin: 0;"> <span id="LC419" class="line" lang="haskell">                <span class="c1" style="color: #998; font-style: italic;">-- differ from the DataCon's representation TyCon.  Example</span></span>

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<pre style="margin: 0;"> <span id="LC420" class="line" lang="haskell">                <span class="c1" style="color: #998; font-style: italic;">--      data instance T [a] where MkT :: a -> T [a]</span></span>

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<pre style="margin: 0;">-<span id="LC421" class="line" lang="haskell">                <span class="c1" style="color: #998; font-style: italic;">-- The <span class="idiff left right">OrigResTy is T [a], but the dcRepTyCon might be :T123</span></span></span>

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<pre style="margin: 0;">+<span id="LC421" class="line" lang="haskell">                <span class="c1" style="color: #998; font-style: italic;">-- The <span class="idiff left right">dcOrigResTy is T [a], but the dcRepTyCon might be R:TList</span></span></span>

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<pre style="margin: 0;"> <span id="LC422" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC423" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Now the strictness annotations and field labels of the constructor</span></span>

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<pre style="margin: 0;"> <span id="LC424" class="line" lang="haskell">        <span class="n" style="color: #333;">dcSrcBangs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HsSrcBang</span><span class="p">],</span></span>

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</li>

<li id="91648438362e5a35363d2bb7abb04016dedd7d7e">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#91648438362e5a35363d2bb7abb04016dedd7d7e"><strong>compiler/GHC/Core/FamInstEnv.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="640" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="640" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<pre style="margin: 0;"> <span id="LC640" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoAxBranch</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- original, possibly stale, tyvars</span></span>

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<pre style="margin: 0;"> <span id="LC641" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Extra eta tyvars</span></span>

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<pre style="margin: 0;"> <span id="LC642" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoVar</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- possibly stale covars</span></span>

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<pre style="margin: 0;">-<span id="LC643" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span>   <span class="c1" style="color: #998; font-style: italic;">-- family/newtype TyCon (for error-checking only)</span></span>

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<pre style="margin: 0;"> <span id="LC643" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span>  <span class="c1" style="color: #998; font-style: italic;">-- LHS patterns</span></span>

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<pre style="margin: 0;"> <span id="LC644" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span>    <span class="c1" style="color: #998; font-style: italic;">-- RHS</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC645" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Role</span><span class="p">]</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC646" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC647" class="line" lang="haskell">             <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoAxBranch</span></span>

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<pre style="margin: 0;">-<span id="LC649" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoAxBranch</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">eta_tvs</span> <span class="n" style="color: #333;">cvs</span> <span class="n" style="color: #333;">ax_tc</span> <span class="n" style="color: #333;">lhs</span> <span class="n" style="color: #333;">rhs</span> <span class="n" style="color: #333;">roles</span> <span class="n" style="color: #333;">loc</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC650" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [CoAxioms are homogeneous] in "GHC.Core.Coercion.Axiom"</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC651" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">typeKind</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">ax_tc</span> <span class="n" style="color: #333;">lhs</span><span class="p">)</span> <span class="p">`</span><span class="n" style="color: #333;">eqType</span><span class="p">`</span> <span class="n" style="color: #333;">typeKind</span> <span class="n" style="color: #333;">rhs</span> <span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC652" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">CoAxBranch</span> <span class="p">{</span> <span class="n" style="color: #333;">cab_tvs</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tvs'</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC653" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">cab_eta_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eta_tvs'</span></span>

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<pre style="margin: 0;">-<span id="LC654" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">cab_cvs</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cvs'</span></span>

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<pre style="margin: 0;">-<span id="LC655" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">cab_lhs</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tidyTypes</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">lhs</span></span>

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<pre style="margin: 0;">-<span id="LC656" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">cab_roles</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">roles</span></span>

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<pre style="margin: 0;">-<span id="LC657" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">cab_rhs</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tidyType</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">rhs</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC658" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">cab_loc</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">loc</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC659" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">cab_incomps</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">placeHolderIncomps</span> <span class="p">}</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC648" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoAxBranch</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">eta_tvs</span> <span class="n" style="color: #333;">cvs</span> <span class="n" style="color: #333;">lhs</span> <span class="n" style="color: #333;">rhs</span> <span class="n" style="color: #333;">roles</span> <span class="n" style="color: #333;">loc</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC649" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">CoAxBranch</span> <span class="p">{</span> <span class="n" style="color: #333;">cab_tvs</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tvs'</span></span>

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<pre style="margin: 0;">+<span id="LC650" class="line" lang="haskell">                    <span class="p">,</span> <span class="n" style="color: #333;">cab_eta_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eta_tvs'</span></span>

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<pre style="margin: 0;">+<span id="LC651" class="line" lang="haskell">                    <span class="p">,</span> <span class="n" style="color: #333;">cab_cvs</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cvs'</span></span>

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<pre style="margin: 0;">+<span id="LC652" class="line" lang="haskell">                    <span class="p">,</span> <span class="n" style="color: #333;">cab_lhs</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tidyTypes</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">lhs</span></span>

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<pre style="margin: 0;">+<span id="LC653" class="line" lang="haskell">                    <span class="p">,</span> <span class="n" style="color: #333;">cab_roles</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">roles</span></span>

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<pre style="margin: 0;">+<span id="LC654" class="line" lang="haskell">                    <span class="p">,</span> <span class="n" style="color: #333;">cab_rhs</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tidyType</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">rhs</span></span>

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<pre style="margin: 0;">+<span id="LC655" class="line" lang="haskell">                    <span class="p">,</span> <span class="n" style="color: #333;">cab_loc</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">loc</span></span>

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<pre style="margin: 0;">+<span id="LC656" class="line" lang="haskell">                    <span class="p">,</span> <span class="n" style="color: #333;">cab_incomps</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">placeHolderIncomps</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC657" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC658" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">env1</span><span class="p">,</span> <span class="n" style="color: #333;">tvs'</span><span class="p">)</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tidyVarBndrs</span> <span class="n" style="color: #333;">init_tidy_env</span> <span class="n" style="color: #333;">tvs</span></span>

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<pre style="margin: 0;"> <span id="LC659" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">env2</span><span class="p">,</span> <span class="n" style="color: #333;">eta_tvs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tidyVarBndrs</span> <span class="n" style="color: #333;">env1</span>          <span class="n" style="color: #333;">eta_tvs</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="703" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="700" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -703,7 +700,7 @@ mkSingleCoAxiom role ax_name tvs eta_tvs cvs fam_tc lhs_tys rhs_ty</td>

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<pre style="margin: 0;"> <span id="LC700" class="line" lang="haskell">            <span class="p">,</span> <span class="n" style="color: #333;">co_ax_implicit</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

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<pre style="margin: 0;"> <span id="LC701" class="line" lang="haskell">            <span class="p">,</span> <span class="n" style="color: #333;">co_ax_branches</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unbranched</span> <span class="p">(</span><span class="n" style="color: #333;">branch</span> <span class="p">{</span> <span class="n" style="color: #333;">cab_incomps</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="p">})</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC702" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">-<span id="LC706" class="line" lang="haskell">    <span class="n" style="color: #333;">branch</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkCoAxBranch</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">eta_tvs</span> <span class="n" style="color: #333;">cvs</span> <span class="n" style="color: #333;"><span class="idiff left">fam_tc</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">lhs_tys</span> <span class="n" style="color: #333;">rhs_ty</span></span>

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<pre style="margin: 0;">+<span id="LC703" class="line" lang="haskell">    <span class="n" style="color: #333;">branch</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkCoAxBranch</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">eta_tvs</span> <span class="n" style="color: #333;">cvs</span> <span class="n" style="color: #333;">lhs_tys</span> <span class="n" style="color: #333;">rhs_ty</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC704" class="line" lang="haskell">                          <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span><span class="p">)</span> <span class="n" style="color: #333;">tvs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="708" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

708

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<td class="diff-line-num new_line" data-linenumber="705" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

705

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<pre style="margin: 0;"> <span id="LC705" class="line" lang="haskell">                          <span class="p">(</span><span class="n" style="color: #333;">getSrcSpan</span> <span class="n" style="color: #333;">ax_name</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="709" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

709

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<td class="diff-line-num new_line" data-linenumber="706" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

706

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<pre style="margin: 0;"> <span id="LC706" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="721" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="718" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -721,7 +718,7 @@ mkNewTypeCoAxiom name tycon tvs roles rhs_ty</td>

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<td class="diff-line-num old_line" data-linenumber="721" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

721

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<td class="diff-line-num new_line" data-linenumber="718" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

718

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<pre style="margin: 0;"> <span id="LC718" class="line" lang="haskell">            <span class="p">,</span> <span class="n" style="color: #333;">co_ax_tc</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tycon</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="722" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

722

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<td class="diff-line-num new_line" data-linenumber="719" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

719

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<pre style="margin: 0;"> <span id="LC719" class="line" lang="haskell">            <span class="p">,</span> <span class="n" style="color: #333;">co_ax_branches</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unbranched</span> <span class="p">(</span><span class="n" style="color: #333;">branch</span> <span class="p">{</span> <span class="n" style="color: #333;">cab_incomps</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="p">})</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="723" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

723

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<td class="diff-line-num new_line" data-linenumber="720" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

720

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<pre style="margin: 0;"> <span id="LC720" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="724" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

724

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<td class="diff-line-num new_line old" data-linenumber="721" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC724" class="line" lang="haskell">    <span class="n" style="color: #333;">branch</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkCoAxBranch</span> <span class="n" style="color: #333;">tvs</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;"><span class="idiff left">tycon</span></span><span class="idiff right"> </span><span class="p">(</span><span class="n" style="color: #333;">mkTyVarTys</span> <span class="n" style="color: #333;">tvs</span><span class="p">)</span> <span class="n" style="color: #333;">rhs_ty</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="725" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="721" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

721

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<pre style="margin: 0;">+<span id="LC721" class="line" lang="haskell">    <span class="n" style="color: #333;">branch</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkCoAxBranch</span> <span class="n" style="color: #333;">tvs</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyVarTys</span> <span class="n" style="color: #333;">tvs</span><span class="p">)</span> <span class="n" style="color: #333;">rhs_ty</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="725" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

725

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<td class="diff-line-num new_line" data-linenumber="722" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

722

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<pre style="margin: 0;"> <span id="LC722" class="line" lang="haskell">                          <span class="n" style="color: #333;">roles</span> <span class="p">(</span><span class="n" style="color: #333;">getSrcSpan</span> <span class="n" style="color: #333;">name</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="726" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

726

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<td class="diff-line-num new_line" data-linenumber="723" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

723

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<pre style="margin: 0;"> <span id="LC723" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="727" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

727

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<td class="diff-line-num new_line" data-linenumber="724" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

724

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<pre style="margin: 0;"> <span id="LC724" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>

</pre>

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<br>

</li>

<li id="36a42448a83a9d1f6df8475f03ead2eed199dd8e">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#36a42448a83a9d1f6df8475f03ead2eed199dd8e"><strong>compiler/GHC/Core/Lint.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -13,7 +13,7 @@ See Note [Core Lint guarantee].</td>

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13

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13

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.Core.Lint</span> <span class="p">(</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

14

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<td class="diff-line-num new_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

14

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell">    <span class="nf" style="color: #900; font-weight: 600;">lintCoreBindings</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lintUnfolding</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell">    <span class="nf" style="color: #900; font-weight: 600;">lintPassResult</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lintInteractiveExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lintExpr</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

16

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<td class="diff-line-num new_line old" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC16" class="line" lang="haskell">    <span class="nf" style="color: #900; font-weight: 600;">lintAnnots</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lint<span class="idiff left right">Types</span></span><span class="p">,</span></span>

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<td class="diff-line-num new old_line" data-linenumber="17" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

16

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell">    <span class="nf" style="color: #900; font-weight: 600;">lintAnnots</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lint<span class="idiff left right">Axiom</span></span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="17" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

17

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17

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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"></span>

</pre>

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18

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18

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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- ** Debug output</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="19" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

19

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<td class="diff-line-num new_line" data-linenumber="19" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

19

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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell">    <span class="nf" style="color: #900; font-weight: 600;">endPass</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">endPassIO</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1490" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1490" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1490,17 +1490,32 @@ lintIdBndr top_lvl bind_site id thing_inside</td>

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1490

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<td class="diff-line-num new_line" data-linenumber="1490" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1490

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<pre style="margin: 0;"> <span id="LC1490" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">%************************************************************************</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1491" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="1491" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1491

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<pre style="margin: 0;"> <span id="LC1491" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1492" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="1492" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1492

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<pre style="margin: 0;"> <span id="LC1492" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1493" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="1493" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1493" class="line" lang="haskell"><span class="n" style="color: #333;">lintTypes</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1494" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1494

</td>

<td class="diff-line-num new_line old" data-linenumber="1493" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1494" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyCoVar</span><span class="p">]</span>   <span class="c1" style="color: #998; font-style: italic;">-- Treat these as in scope</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1495" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1495

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<td class="diff-line-num new_line old" data-linenumber="1493" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1495" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1496" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1493" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1493

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<pre style="margin: 0;">+<span id="LC1493" class="line" lang="haskell"><span class="n" style="color: #333;">lintAxiom</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1496" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1494" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1494

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<pre style="margin: 0;">+<span id="LC1494" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoAxiom</span> <span class="kt" style="color: #458; font-weight: 600;">Unbranched</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1496" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1496

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<td class="diff-line-num new_line" data-linenumber="1495" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1495" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">MsgDoc</span> <span class="c1" style="color: #998; font-style: italic;">-- Nothing => OK</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1497" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1497

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<td class="diff-line-num new_line old" data-linenumber="1496" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1497" class="line" lang="haskell"><span class="n" style="color: #333;">lint<span class="idiff left">Types</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vars</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tys</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1498" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1496" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1496

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<pre style="margin: 0;">+<span id="LC1496" class="line" lang="haskell"><span class="n" style="color: #333;">lint<span class="idiff left">Axiom</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">axiom</span></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1498" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1498

</td>

<td class="diff-line-num new_line" data-linenumber="1497" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1497

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<pre style="margin: 0;"> <span id="LC1497" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isEmptyBag</span> <span class="n" style="color: #333;">errs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1499" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1499

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<td class="diff-line-num new_line" data-linenumber="1498" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1498

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<pre style="margin: 0;"> <span id="LC1498" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>       <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">pprMessageBag</span> <span class="n" style="color: #333;">errs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1500" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1500

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<td class="diff-line-num new_line" data-linenumber="1499" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1499

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<pre style="margin: 0;"> <span id="LC1499" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1501" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1501

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<td class="diff-line-num new_line old" data-linenumber="1500" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1501" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">_warns</span><span class="p">,</span> <span class="n" style="color: #333;">errs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">initL</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">defaultLintFlags</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">linter</span></span>

</pre>

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1502

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<pre style="margin: 0;">-<span id="LC1502" class="line" lang="haskell">    <span class="n" style="color: #333;">linter</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lintBinders</span> <span class="kt" style="color: #458; font-weight: 600;">LambdaBind</span> <span class="n" style="color: #333;">vars</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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1503

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<pre style="margin: 0;">-<span id="LC1503" class="line" lang="haskell">             <span class="n" style="color: #333;">mapM_</span> <span class="n" style="color: #333;">lintType</span> <span class="n" style="color: #333;">tys</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1500" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1500

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<pre style="margin: 0;">+<span id="LC1500" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">_warns</span><span class="p">,</span> <span class="n" style="color: #333;">errs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">initL</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">defaultLintFlags</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1501" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1501

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<pre style="margin: 0;">+<span id="LC1501" class="line" lang="haskell">                     <span class="n" style="color: #333;">lint_axiom</span> <span class="n" style="color: #333;">axiom</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1502" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1502

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<pre style="margin: 0;">+<span id="LC1502" class="line" lang="haskell"></span>

</pre>

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1503

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<pre style="margin: 0;">+<span id="LC1503" class="line" lang="haskell"><span class="n" style="color: #333;">lint_axiom</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoAxiom</span> <span class="kt" style="color: #458; font-weight: 600;">Unbranched</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LintM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1504" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1504

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<pre style="margin: 0;">+<span id="LC1504" class="line" lang="haskell"><span class="n" style="color: #333;">lint_axiom</span> <span class="n" style="color: #333;">ax</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoAxiom</span> <span class="p">{</span> <span class="n" style="color: #333;">co_ax_tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fam_tc</span> <span class="p">})</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1505" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1505

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<pre style="margin: 0;">+<span id="LC1505" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lintBinders</span> <span class="kt" style="color: #458; font-weight: 600;">LambdaBind</span> <span class="p">(</span><span class="n" style="color: #333;">tvs</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">cvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1506" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1506

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<pre style="margin: 0;">+<span id="LC1506" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">lhs_args</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1504" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1507" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1507

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<pre style="margin: 0;">+<span id="LC1507" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">lhs'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lintType</span> <span class="n" style="color: #333;">lhs</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1508" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1508

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<pre style="margin: 0;">+<span id="LC1508" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">rhs'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lintType</span> <span class="n" style="color: #333;">rhs</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1509" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1509

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<pre style="margin: 0;">+<span id="LC1509" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">lhs_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">typeKind</span> <span class="n" style="color: #333;">lhs'</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1510" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1510

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<pre style="margin: 0;">+<span id="LC1510" class="line" lang="haskell">             <span class="n" style="color: #333;">rhs_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">typeKind</span> <span class="n" style="color: #333;">rhs'</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1511" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1511

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<pre style="margin: 0;">+<span id="LC1511" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">checkL</span> <span class="p">(</span><span class="n" style="color: #333;">lhs_kind</span> <span class="p">`</span><span class="n" style="color: #333;">eqType</span><span class="p">`</span> <span class="n" style="color: #333;">rhs_kind</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1504" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1512" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1512

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<pre style="margin: 0;">+<span id="LC1512" class="line" lang="haskell">         <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Inhomogeneous axiom"</span><span class="p">)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1513" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1513

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<pre style="margin: 0;">+<span id="LC1513" class="line" lang="haskell">            <span class="mi" style="color: #099;">2</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ax</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"lhs:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lhs</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lhs_kind</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1514" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1514

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<pre style="margin: 0;">+<span id="LC1514" class="line" lang="haskell">                      <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"rhs:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rhs</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rhs_kind</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1504" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1515" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1515

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<pre style="margin: 0;">+<span id="LC1515" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1504" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1516" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1516

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<pre style="margin: 0;">+<span id="LC1516" class="line" lang="haskell">   <span class="kt" style="color: #458; font-weight: 600;">CoAxBranch</span> <span class="p">{</span> <span class="n" style="color: #333;">cab_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tvs</span><span class="p">,</span> <span class="n" style="color: #333;">cab_cvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cvs</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1504" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1517" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1517

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<pre style="margin: 0;">+<span id="LC1517" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">cab_lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lhs_args</span><span class="p">,</span> <span class="n" style="color: #333;">cab_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs</span> <span class="p">}</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coAxiomSingleBranch</span> <span class="n" style="color: #333;">ax</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1518" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1518

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<pre style="margin: 0;">+<span id="LC1518" class="line" lang="haskell"></span>

</pre>

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1504

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<td class="diff-line-num new_line" data-linenumber="1519" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1519

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<pre style="margin: 0;"> <span id="LC1519" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1505" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1505

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<td class="diff-line-num new_line" data-linenumber="1520" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1520

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<pre style="margin: 0;"> <span id="LC1520" class="line" lang="haskell"><span class="n" style="color: #333;">lintValueType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LintM</span> <span class="kt" style="color: #458; font-weight: 600;">LintedType</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1506" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1506

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<td class="diff-line-num new_line" data-linenumber="1521" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1521

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<pre style="margin: 0;"> <span id="LC1521" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Types only, not kinds</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1520" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1520,7 +1535,7 @@ checkTyCon tc</td>

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1520

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<td class="diff-line-num new_line" data-linenumber="1535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1535

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<pre style="margin: 0;"> <span id="LC1535" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">checkL</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">isTcTyCon</span> <span class="n" style="color: #333;">tc</span><span class="p">))</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Found TcTyCon:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1521" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1521

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<td class="diff-line-num new_line" data-linenumber="1536" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1536

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<pre style="margin: 0;"> <span id="LC1536" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1522" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1522

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<td class="diff-line-num new_line" data-linenumber="1537" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1537

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<pre style="margin: 0;"> <span id="LC1537" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-------------------</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1523" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1523

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<td class="diff-line-num new_line old" data-linenumber="1538" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1523" class="line" lang="haskell"><span class="n" style="color: #333;">lintType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Linted</span>Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LintM</span> <span class="kt" style="color: #458; font-weight: 600;">LintedType</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1524" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1538" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1538

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<pre style="margin: 0;">+<span id="LC1538" class="line" lang="haskell"><span class="n" style="color: #333;">lintType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LintM</span> <span class="kt" style="color: #458; font-weight: 600;">LintedType</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1524" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1524

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<td class="diff-line-num new_line" data-linenumber="1539" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1539

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<pre style="margin: 0;"> <span id="LC1539" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1525" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1525

</td>

<td class="diff-line-num new_line" data-linenumber="1540" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1540

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<pre style="margin: 0;"> <span id="LC1540" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If you edit this function, you may need to update the GHC formalism</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1526" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1526

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<td class="diff-line-num new_line" data-linenumber="1541" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1541

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<pre style="margin: 0;"> <span id="LC1541" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [GHC Formalism]</span></span>

</pre>

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<li id="4aad0050db1a8a20db8bbca149111de99cb299c9">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#4aad0050db1a8a20db8bbca149111de99cb299c9"><strong>compiler/GHC/Core/TyCon.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="292" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="292" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -292,7 +292,14 @@ See also Note [Wrappers for data instance tycons] in GHC.Types.Id.Make</td>

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<pre style="margin: 0;"> <span id="LC292" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Indeed the latter type is unknown to the programmer.</span></span>

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<pre style="margin: 0;"> <span id="LC293" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC294" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - There *is* an instance for (T Int) in the type-family instance</span></span>

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<pre style="margin: 0;">-<span id="LC295" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    environment, but it is only used for overlap checking</span></span>

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<pre style="margin: 0;">+<span id="LC295" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    environment, but it is looked up (via tcLookupDataFamilyInst)</span></span>

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<pre style="margin: 0;">+<span id="LC296" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    in can_eq_nc (via tcTopNormaliseNewTypeTF_maybe) when trying to</span></span>

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<pre style="margin: 0;">+<span id="LC297" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    solve representational equalities like</span></span>

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<pre style="margin: 0;">+<span id="LC298" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         T Int ~R# Bool</span></span>

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<pre style="margin: 0;">+<span id="LC299" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Here we look up (T Int), convert it to R:TInt, and then unwrap the</span></span>

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<pre style="margin: 0;">+<span id="LC300" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    newtype R:TInt.</span></span>

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<pre style="margin: 0;">+<span id="LC301" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC302" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    It is also looked up in reduceTyFamApp_maybe.</span></span>

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<pre style="margin: 0;"> <span id="LC303" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC304" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - It's fine to have T in the LHS of a type function:</span></span>

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<pre style="margin: 0;"> <span id="LC305" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    type instance F (T a) = [a]</span></span>

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<li id="9355bef855426caf5f526925edf351b20f9a86c4">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#9355bef855426caf5f526925edf351b20f9a86c4"><strong>compiler/GHC/Tc/Gen/HsType.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="46" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="46" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -46,7 +46,8 @@ module GHC.Tc.Gen.HsType (</td>

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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcNamedWildCardBinders</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcHsLiftedType</span><span class="p">,</span>   <span class="nf" style="color: #900; font-weight: 600;">tcHsOpenType</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcHsLiftedTypeNC</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcHsOpenTypeNC</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC49" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcInferLHsType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcInferLHsTypeUnsaturated</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcCheckLHsType</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC49" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcInferLHsTypeKind</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcInferLHsType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcInferLHsTypeUnsaturated</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC50" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcCheckLHsType</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcHsMbContext</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcHsContext</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcLHsPredType</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">failIfEmitsConstraints</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">solveEqualities</span><span class="p">,</span> <span class="c1" style="color: #998; font-style: italic;">-- useful re-export</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="74" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="75" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -74,6 +75,7 @@ import GHC.Tc.Types.Origin</td>

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<pre style="margin: 0;"> <span id="LC75" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Predicate</span></span>

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<pre style="margin: 0;"> <span id="LC76" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Types.Constraint</span></span>

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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Env</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC78" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Instantiate</span><span class="p">(</span> <span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC79" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.TcMType</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC80" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Validity</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC81" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Unify</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="84" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="86" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -84,7 +86,7 @@ import GHC.Core.TyCo.Rep</td>

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<pre style="margin: 0;"> <span id="LC86" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCo.Ppr</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC87" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Errors</span>      <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">reportAllUnsolved</span> <span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC88" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.TcType</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC87" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Instantiate</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">tcInstInvisibleTyBinders</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcInstInvisibleTyBinder</span> <span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC89" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Instantiate</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">tcInstInvisibleTyBinders<span class="idiff left right">N</span></span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcInstInvisibleTyBinder</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC90" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Type</span></span>

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<pre style="margin: 0;"> <span id="LC91" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Types.Prim</span></span>

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<pre style="margin: 0;"> <span id="LC92" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Name.Reader</span><span class="p">(</span> <span class="n" style="color: #333;">lookupLocalRdrOcc</span> <span class="p">)</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="612" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -612,12 +614,11 @@ tcHsOpenType, tcHsLiftedType,</td>

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<pre style="margin: 0;"> <span id="LC614" class="line" lang="haskell">  <span class="n" style="color: #333;">tcHsOpenTypeNC</span><span class="p">,</span> <span class="n" style="color: #333;">tcHsLiftedTypeNC</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span></span>

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<pre style="margin: 0;"> <span id="LC615" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Used for type signatures</span></span>

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<pre style="margin: 0;"> <span id="LC616" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Do not do validity checking</span></span>

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<pre style="margin: 0;">-<span id="LC615" class="line" lang="haskell"><span class="n" style="color: #333;">tcHsOpenType</span> <span class="n" style="color: #333;"><span class="idiff left">ty</span></span><span class="idiff">   </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">addTypeCtxt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tcHsOpenTypeNC</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">ty</span></span>

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<pre style="margin: 0;">-<span id="LC616" class="line" lang="haskell"><span class="n" style="color: #333;">tcHsLiftedType</span> <span class="n" style="color: #333;"><span class="idiff left">ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">addTypeCtxt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tcHsLiftedTypeNC</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">ty</span></span>

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<pre style="margin: 0;">+<span id="LC617" class="line" lang="haskell"><span class="n" style="color: #333;">tcHsOpenType</span> <span class="idiff left">  </span><span class="n" style="color: #333;"><span class="idiff">hs_ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">addTypeCtxt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">hs_ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tcHsOpenTypeNC</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">hs_</span>ty</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC618" class="line" lang="haskell"><span class="n" style="color: #333;">tcHsLiftedType</span> <span class="n" style="color: #333;"><span class="idiff left">hs_ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">addTypeCtxt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">hs_ty</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tcHsLiftedTypeNC</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">hs_</span>ty</span></span>

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<pre style="margin: 0;"> <span id="LC619" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC618" class="line" lang="haskell"><span class="n" style="color: #333;">tcHsOpenTypeNC</span>   <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">ek</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newOpenTypeKind</span></span>

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<pre style="margin: 0;">-<span id="LC619" class="line" lang="haskell">                         <span class="p">;</span> <span class="n" style="color: #333;">tcLHsType</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">ek</span> <span class="p">}</span></span>

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<pre style="margin: 0;">-<span id="LC620" class="line" lang="haskell"><span class="n" style="color: #333;">tcHsLiftedTypeNC</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcLHsType</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">liftedTypeKind</span></span>

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<pre style="margin: 0;">+<span id="LC620" class="line" lang="haskell"><span class="n" style="color: #333;">tcHsOpenTypeNC</span>   <span class="n" style="color: #333;">hs_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">ek</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newOpenTypeKind</span><span class="p">;</span> <span class="n" style="color: #333;">tcLHsType</span> <span class="n" style="color: #333;">hs_ty</span> <span class="n" style="color: #333;">ek</span> <span class="p">}</span></span>

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<pre style="margin: 0;">+<span id="LC621" class="line" lang="haskell"><span class="n" style="color: #333;">tcHsLiftedTypeNC</span> <span class="n" style="color: #333;">hs_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcLHsType</span> <span class="n" style="color: #333;">hs_ty</span> <span class="n" style="color: #333;">liftedTypeKind</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC622" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC623" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Like tcHsType, but takes an expected kind</span></span>

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<pre style="margin: 0;"> <span id="LC624" class="line" lang="haskell"><span class="n" style="color: #333;">tcCheckLHsType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ContextKind</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span></span>

</pre>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -627,12 +628,19 @@ tcCheckLHsType hs_ty exp_kind</td>

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<pre style="margin: 0;"> <span id="LC628" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">tcLHsType</span> <span class="n" style="color: #333;">hs_ty</span> <span class="n" style="color: #333;">ek</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC629" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC630" class="line" lang="haskell"><span class="n" style="color: #333;">tcInferLHsType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span></span>

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<pre style="margin: 0;">-<span id="LC630" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Called from outside: set the context</span></span>

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<pre style="margin: 0;"> <span id="LC631" class="line" lang="haskell"><span class="n" style="color: #333;">tcInferLHsType</span> <span class="n" style="color: #333;">hs_ty</span></span>

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<pre style="margin: 0;">-<span id="LC632" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addTypeCtxt</span> <span class="n" style="color: #333;">hs_ty</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;">-<span id="LC633" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="n" style="color: #333;">_kind</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tc_infer_lhs_type</span> <span class="p">(</span><span class="n" style="color: #333;">mkMode</span> <span class="kt" style="color: #458; font-weight: 600;">TypeLevel</span><span class="p">)</span> <span class="n" style="color: #333;">hs_ty</span></span>

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<pre style="margin: 0;">+<span id="LC632" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span><span class="p">,</span><span class="n" style="color: #333;">_kind</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInferLHsTypeKind</span> <span class="n" style="color: #333;">hs_ty</span></span>

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<pre style="margin: 0;"> <span id="LC633" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">ty</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC634" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC635" class="line" lang="haskell"><span class="n" style="color: #333;">tcInferLHsTypeKind</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcType</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC636" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Called from outside: set the context</span></span>

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<pre style="margin: 0;">+<span id="LC637" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Eagerly instantiate any trailing invisible binders</span></span>

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<pre style="margin: 0;">+<span id="LC638" class="line" lang="haskell"><span class="n" style="color: #333;">tcInferLHsTypeKind</span> <span class="n" style="color: #333;">lhs_ty</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">hs_ty</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC639" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addTypeCtxt</span> <span class="n" style="color: #333;">lhs_ty</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;">+<span id="LC640" class="line" lang="haskell">    <span class="n" style="color: #333;">setSrcSpan</span> <span class="n" style="color: #333;">loc</span>     <span class="o" style="font-weight: 600;">$</span>  <span class="c1" style="color: #998; font-style: italic;">-- Cover the tcInstInvisibleTyBinders</span></span>

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<pre style="margin: 0;">+<span id="LC641" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">res_ty</span><span class="p">,</span> <span class="n" style="color: #333;">res_kind</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tc_infer_hs_type</span> <span class="p">(</span><span class="n" style="color: #333;">mkMode</span> <span class="kt" style="color: #458; font-weight: 600;">TypeLevel</span><span class="p">)</span> <span class="n" style="color: #333;">hs_ty</span></span>

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<pre style="margin: 0;">+<span id="LC642" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="n" style="color: #333;">res_ty</span> <span class="n" style="color: #333;">res_kind</span> <span class="p">}</span></span>

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<pre style="margin: 0;">+<span id="LC643" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC644" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Used to check the argument of GHCi :kind</span></span>

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<pre style="margin: 0;"> <span id="LC645" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Allow and report wildcards, e.g. :kind T _</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC646" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Do not saturate family applications: see Note [Dealing with :kind]</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1587" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1587,14 +1595,14 @@ saturateFamApp :: TcType -> TcKind -> TcM (TcType, TcKind)</td>

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<pre style="margin: 0;"> <span id="LC1595" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     tcTypeKind ty = kind</span></span>

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<td class="diff-line-num new_line" data-linenumber="1596" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1596" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

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<td class="diff-line-num old_line" data-linenumber="1589" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="1597" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1597" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If 'ty' is an unsaturated family application with trailing</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="1598" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1590" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- invisible arguments, instant<span class="idiff left right">t</span>iate them.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1598" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- invisible arguments, instantiate them.</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="1599" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1599" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [saturateFamApp]</span></span>

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<td class="diff-line-num old_line" data-linenumber="1592" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1592

</td>

<td class="diff-line-num new_line" data-linenumber="1600" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1600

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1600" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1593" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1593

</td>

<td class="diff-line-num new_line" data-linenumber="1601" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1601

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1601" class="line" lang="haskell"><span class="n" style="color: #333;">saturateFamApp</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1594" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1594

</td>

<td class="diff-line-num new_line" data-linenumber="1602" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1602

</td>

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<pre style="margin: 0;"> <span id="LC1602" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tc</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcSplitTyConApp_maybe</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1595

</td>

<td class="diff-line-num new_line" data-linenumber="1603" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1603

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1603" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">mustBeSaturated</span> <span class="n" style="color: #333;">tc</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1596" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1596

</td>

<td class="diff-line-num new_line" data-linenumber="1604" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1604

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1604" class="line" lang="haskell">  <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">n_to_inst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConArity</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">-</span> <span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">args</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1597" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1597

</td>

<td class="diff-line-num new_line old" data-linenumber="1605" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1597" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">extra_args</span><span class="p">,</span> <span class="n" style="color: #333;">ki'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="n" style="color: #333;">n_to_inst</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1598" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1605" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1605

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1605" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">extra_args</span><span class="p">,</span> <span class="n" style="color: #333;">ki'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstInvisibleTyBinders<span class="idiff left right">N</span></span> <span class="n" style="color: #333;">n_to_inst</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1598" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1598

</td>

<td class="diff-line-num new_line" data-linenumber="1606" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1606

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1606" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span> <span class="p">`</span><span class="n" style="color: #333;">mkTcAppTys</span><span class="p">`</span> <span class="n" style="color: #333;">extra_args</span><span class="p">,</span> <span class="n" style="color: #333;">ki'</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1599" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1599

</td>

<td class="diff-line-num new_line" data-linenumber="1607" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1607

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1607" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1600" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1600

</td>

<td class="diff-line-num new_line" data-linenumber="1608" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1608

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1608" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="n" style="color: #333;">kind</span><span class="p">)</span></span>

</pre>

</td>

</tr>

<tr class="line_holder match" id="" style="line-height: 1.6;">

<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1651" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1659" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1651,7 +1659,7 @@ checkExpectedKind :: HasDebugCallStack</td>

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<td class="diff-line-num old_line" data-linenumber="1651" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1651

</td>

<td class="diff-line-num new_line" data-linenumber="1659" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1659

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1659" class="line" lang="haskell"><span class="n" style="color: #333;">checkExpectedKind</span> <span class="n" style="color: #333;">hs_ty</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">act_kind</span> <span class="n" style="color: #333;">exp_kind</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1652" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1652

</td>

<td class="diff-line-num new_line" data-linenumber="1660" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1660

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1660" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"checkExpectedKind"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">act_kind</span><span class="p">)</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1653" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1653

</td>

<td class="diff-line-num new_line" data-linenumber="1661" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1661

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1661" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1654" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1654

</td>

<td class="diff-line-num new_line old" data-linenumber="1662" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1654" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">new_args</span><span class="p">,</span> <span class="n" style="color: #333;">act_kind'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="n" style="color: #333;">n_to_inst</span> <span class="n" style="color: #333;">act_kind</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1655" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1662" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1662

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1662" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">new_args</span><span class="p">,</span> <span class="n" style="color: #333;">act_kind'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstInvisibleTyBinders<span class="idiff left right">N</span></span> <span class="n" style="color: #333;">n_to_inst</span> <span class="n" style="color: #333;">act_kind</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1655" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1655

</td>

<td class="diff-line-num new_line" data-linenumber="1663" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1663

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1663" class="line" lang="haskell"></span>

</pre>

</td>

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1656

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<td class="diff-line-num new_line" data-linenumber="1664" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1664

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<pre style="margin: 0;"> <span id="LC1664" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">origin</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TypeEqOrigin</span> <span class="p">{</span> <span class="n" style="color: #333;">uo_actual</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">act_kind'</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1657" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1657

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<td class="diff-line-num new_line" data-linenumber="1665" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1665

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<pre style="margin: 0;"> <span id="LC1665" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">uo_expected</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exp_kind</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3218,11 +3226,16 @@ data DataSort</td>

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<td class="diff-line-num old_line" data-linenumber="3218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3218

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<td class="diff-line-num new_line" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3226

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<pre style="margin: 0;"> <span id="LC3226" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3219" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3219

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<td class="diff-line-num new_line" data-linenumber="3227" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3227

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<pre style="margin: 0;"> <span id="LC3227" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See also Note [Datatype return kinds] in GHC.Tc.TyCl</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3220" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3220

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<td class="diff-line-num new_line" data-linenumber="3228" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3228

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<pre style="margin: 0;"> <span id="LC3228" class="line" lang="haskell"><span class="n" style="color: #333;">checkDataKindSig</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DataSort</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Kind</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3221" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3221

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<td class="diff-line-num new_line old" data-linenumber="3229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3221" class="line" lang="haskell"><span class="n" style="color: #333;">checkDataKindSig</span> <span class="n" style="color: #333;">data_sort</span> <span class="n" style="color: #333;">kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3222" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="3229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3222" class="line" lang="haskell">  <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3223" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3223

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<td class="diff-line-num new_line old" data-linenumber="3229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3223" class="line" lang="haskell">  <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"checkDataKindSig"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">kind</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3224" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3224

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<td class="diff-line-num new_line old" data-linenumber="3229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3224" class="line" lang="haskell">  <span class="n" style="color: #333;">checkTc</span> <span class="p">(</span><span class="n" style="color: #333;">is_TYPE_or_Type</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">is_kind_var</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">err_msg</span> <span class="n" style="color: #333;">dflags</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3229

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<pre style="margin: 0;">+<span id="LC3229" class="line" lang="haskell"><span class="n" style="color: #333;">checkDataKindSig</span> <span class="n" style="color: #333;">data_sort</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3230" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3230

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<pre style="margin: 0;">+<span id="LC3230" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3231" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3231

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<pre style="margin: 0;">+<span id="LC3231" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"checkDataKindSig"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">kind</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3232" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3232

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<pre style="margin: 0;">+<span id="LC3232" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">checkTc</span> <span class="p">(</span><span class="n" style="color: #333;">is_TYPE_or_Type</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">is_kind_var</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3233" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3233" class="line" lang="haskell">                 <span class="p">(</span><span class="n" style="color: #333;">err_msg</span> <span class="n" style="color: #333;">dflags</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3225

</td>

<td class="diff-line-num new_line" data-linenumber="3234" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3234

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<pre style="margin: 0;"> <span id="LC3234" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3235" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3235

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<pre style="margin: 0;">+<span id="LC3235" class="line" lang="haskell">    <span class="n" style="color: #333;">res_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">snd</span> <span class="p">(</span><span class="n" style="color: #333;">tcSplitPiTys</span> <span class="n" style="color: #333;">kind</span><span class="p">)</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3236" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3236

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<pre style="margin: 0;">+<span id="LC3236" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Look for the result kind after</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3237" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3237

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<pre style="margin: 0;">+<span id="LC3237" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- peeling off any foralls and arrows</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3238" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3238

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3238" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3226

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<td class="diff-line-num new_line" data-linenumber="3239" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3239

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<pre style="margin: 0;"> <span id="LC3239" class="line" lang="haskell">    <span class="n" style="color: #333;">pp_dec</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3227" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3227

</td>

<td class="diff-line-num new_line" data-linenumber="3240" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3240

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<pre style="margin: 0;"> <span id="LC3240" class="line" lang="haskell">    <span class="n" style="color: #333;">pp_dec</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3228" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3228

</td>

<td class="diff-line-num new_line" data-linenumber="3241" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3241

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<pre style="margin: 0;"> <span id="LC3241" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">data_sort</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

</td>

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<tr class="line_holder match" id="" style="line-height: 1.6;">

<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3272" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3259,16 +3272,19 @@ checkDataKindSig data_sort kind = do</td>

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<td class="diff-line-num old_line" data-linenumber="3259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3259

</td>

<td class="diff-line-num new_line" data-linenumber="3272" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3272

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<pre style="margin: 0;"> <span id="LC3272" class="line" lang="haskell">           <span class="c1" style="color: #998; font-style: italic;">-- have return kind `TYPE r` unconditionally (#16827).</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3260" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3260

</td>

<td class="diff-line-num new_line" data-linenumber="3273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3273

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<pre style="margin: 0;"> <span id="LC3273" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3261" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3261

</td>

<td class="diff-line-num new_line" data-linenumber="3274" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3274

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<pre style="margin: 0;"> <span id="LC3274" class="line" lang="haskell">    <span class="n" style="color: #333;">is_TYPE</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="3262" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3262

</td>

<td class="diff-line-num new_line old" data-linenumber="3275" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3262" class="line" lang="haskell">    <span class="n" style="color: #333;">is_TYPE</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcIsRuntimeTypeKind</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3275" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3275

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<pre style="margin: 0;">+<span id="LC3275" class="line" lang="haskell">    <span class="n" style="color: #333;">is_TYPE</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcIsRuntimeTypeKind</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3276" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3276

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3276" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3277

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3277" class="line" lang="haskell">    <span class="n" style="color: #333;">is_Type</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3278

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3278" class="line" lang="haskell">    <span class="n" style="color: #333;">is_Type</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcIsLiftedTypeKind</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3263

</td>

<td class="diff-line-num new_line" data-linenumber="3279" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3279

</td>

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<pre style="margin: 0;"> <span id="LC3279" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="3264" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3264

</td>

<td class="diff-line-num new_line" data-linenumber="3280" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3280

</td>

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<pre style="margin: 0;"> <span id="LC3280" class="line" lang="haskell">    <span class="n" style="color: #333;">is_TYPE_or_Type</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3265" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3265

</td>

<td class="diff-line-num new_line" data-linenumber="3281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3281

</td>

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<pre style="margin: 0;"> <span id="LC3281" class="line" lang="haskell">    <span class="n" style="color: #333;">is_TYPE_or_Type</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tYPE_ok</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">is_TYPE</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="3266" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3266

</td>

<td class="diff-line-num new_line old" data-linenumber="3282" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3266" class="line" lang="haskell">                           <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">tcIsLiftedTypeKind</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">kind</span></span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="3267" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3282" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3282

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<pre style="margin: 0;">+<span id="LC3282" class="line" lang="haskell">                           <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">is_Type</span></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3267" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3267

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<td class="diff-line-num new_line" data-linenumber="3283" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3283

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<pre style="margin: 0;"> <span id="LC3283" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3268" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3268

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<td class="diff-line-num new_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3284

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<pre style="margin: 0;"> <span id="LC3284" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- In the particular case of a data family, permit a return kind of the</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3269" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3269

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<td class="diff-line-num new_line" data-linenumber="3285" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3285

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<pre style="margin: 0;"> <span id="LC3285" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- form `:: k` (where `k` is a bare kind variable).</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3270" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3270

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<td class="diff-line-num new_line" data-linenumber="3286" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3286

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<pre style="margin: 0;"> <span id="LC3286" class="line" lang="haskell">    <span class="n" style="color: #333;">is_kind_var</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3271" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3271

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<td class="diff-line-num new_line old" data-linenumber="3287" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3271" class="line" lang="haskell">    <span class="n" style="color: #333;">is_kind_var</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">is_data_family</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isJust</span> <span class="p">(</span><span class="n" style="color: #333;">tcGetCastedTyVar_maybe</span> <span class="n" style="color: #333;">kind</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3272" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3287" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3287

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<pre style="margin: 0;">+<span id="LC3287" class="line" lang="haskell">    <span class="n" style="color: #333;">is_kind_var</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">is_data_family</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isJust</span> <span class="p">(</span><span class="n" style="color: #333;">tcGetCastedTyVar_maybe</span> <span class="n" style="color: #333;"><span class="idiff left right">res_</span>kind</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3272" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3272

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<td class="diff-line-num new_line" data-linenumber="3288" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3288

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<pre style="margin: 0;"> <span id="LC3288" class="line" lang="haskell">                <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>      <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3273

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<td class="diff-line-num new_line" data-linenumber="3289" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3289

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<pre style="margin: 0;"> <span id="LC3289" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3274" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3274

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<td class="diff-line-num new_line" data-linenumber="3290" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3290

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<pre style="margin: 0;"> <span id="LC3290" class="line" lang="haskell">    <span class="n" style="color: #333;">err_msg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3277,7 +3293,7 @@ checkDataKindSig data_sort kind = do</td>

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<td class="diff-line-num old_line" data-linenumber="3277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3277

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<td class="diff-line-num new_line" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3293

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<pre style="margin: 0;"> <span id="LC3293" class="line" lang="haskell">                   <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"has non-"</span> <span class="o" style="font-weight: 600;"><></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3278

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<td class="diff-line-num new_line" data-linenumber="3294" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3294

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<pre style="margin: 0;"> <span id="LC3294" class="line" lang="haskell">                   <span class="p">(</span><span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">tYPE_ok</span> <span class="n" style="color: #333;">dflags</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"TYPE"</span> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">liftedTypeKind</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3279" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3279

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<td class="diff-line-num new_line" data-linenumber="3295" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3295

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<pre style="margin: 0;"> <span id="LC3295" class="line" lang="haskell">                 <span class="p">,</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">is_data_family</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"and non-variable"</span> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">empty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><+></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3280" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3280

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<td class="diff-line-num new_line old" data-linenumber="3296" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3280" class="line" lang="haskell">                   <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"return kind"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">kind</span><span class="p">)</span> <span class="p">])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3296" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3296

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<pre style="margin: 0;">+<span id="LC3296" class="line" lang="haskell">                   <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"return kind"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;"><span class="idiff left right">res_</span>kind</span><span class="p">)</span> <span class="p">])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3281

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<td class="diff-line-num new_line" data-linenumber="3297" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3297

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<pre style="margin: 0;"> <span id="LC3297" class="line" lang="haskell">          <span class="p">,</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">tYPE_ok</span> <span class="n" style="color: #333;">dflags</span><span class="p">)</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">is_TYPE</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">is_newtype</span> <span class="o" style="font-weight: 600;">&&</span></span>

</pre>

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3282

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<td class="diff-line-num new_line" data-linenumber="3298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3298

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<pre style="margin: 0;"> <span id="LC3298" class="line" lang="haskell">               <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">xopt</span> <span class="kt" style="color: #458; font-weight: 600;">LangExt</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">UnliftedNewtypes</span> <span class="n" style="color: #333;">dflags</span><span class="p">)</span></span>

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3283

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<td class="diff-line-num new_line" data-linenumber="3299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3299

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<pre style="margin: 0;"> <span id="LC3299" class="line" lang="haskell">            <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Perhaps you intended to use UnliftedNewtypes"</span></span>

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<br>

</li>

<li id="07389a8f0516c26409d86f6bb651ed00759b5d4c">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#07389a8f0516c26409d86f6bb651ed00759b5d4c"><strong>compiler/GHC/Tc/Instance/Family.hs</strong></a>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="162" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -162,34 +162,27 @@ addressed yet.</td>

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<td class="diff-line-num old_line" data-linenumber="162" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

162

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<pre style="margin: 0;"> <span id="LC162" class="line" lang="haskell"><span class="n" style="color: #333;">newFamInst</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">FamFlavor</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoAxiom</span> <span class="kt" style="color: #458; font-weight: 600;">Unbranched</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">FamInst</span></span>

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<pre style="margin: 0;"> <span id="LC163" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Freshen the type variables of the FamInst branches</span></span>

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<pre style="margin: 0;"> <span id="LC164" class="line" lang="haskell"><span class="n" style="color: #333;">newFamInst</span> <span class="n" style="color: #333;">flavor</span> <span class="n" style="color: #333;">axiom</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoAxiom</span> <span class="p">{</span> <span class="n" style="color: #333;">co_ax_tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fam_tc</span> <span class="p">})</span></span>

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<pre style="margin: 0;">-<span id="LC165" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">tyCoVarsOfTypes</span> <span class="n" style="color: #333;">lhs</span> <span class="p">`</span><span class="n" style="color: #333;">subVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">tcv_set</span><span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"lhs"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">pp_ax</span> <span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC166" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">lhs_kind</span> <span class="p">`</span><span class="n" style="color: #333;">eqType</span><span class="p">`</span> <span class="n" style="color: #333;">rhs_kind</span><span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"kind"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">pp_ax</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lhs_kind</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rhs_kind</span> <span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC167" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- We used to have an assertion that the tyvars of the RHS were bound</span></span>

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<pre style="margin: 0;">-<span id="LC168" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- by tcv_set, but in error situations like  F Int = a that isn't</span></span>

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<pre style="margin: 0;">-<span id="LC169" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- true; a later check in checkValidFamInst rejects it</span></span>

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<pre style="margin: 0;">-<span id="LC170" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">subst</span><span class="p">,</span> <span class="n" style="color: #333;">tvs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">freshenTyVarBndrs</span> <span class="n" style="color: #333;">tvs</span></span>

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<pre style="margin: 0;">-<span id="LC171" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">subst</span><span class="p">,</span> <span class="n" style="color: #333;">cvs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">freshenCoVarBndrsX</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">cvs</span></span>

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<pre style="margin: 0;">-<span id="LC172" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>

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<pre style="margin: 0;">-<span id="LC173" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">lhs'</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTys</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">lhs</span></span>

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<pre style="margin: 0;">-<span id="LC174" class="line" lang="haskell">             <span class="n" style="color: #333;">rhs'</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span>  <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">rhs</span></span>

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<pre style="margin: 0;">-<span id="LC175" class="line" lang="haskell">             <span class="n" style="color: #333;">tcvs'</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tvs'</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">cvs'</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="176" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="165" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC165" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- Use lintAxiom to check that the axiom is well formed</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="176" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="166" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

166

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<pre style="margin: 0;">+<span id="LC166" class="line" lang="haskell">         <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="176" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

176

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<td class="diff-line-num new_line" data-linenumber="167" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

167

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<pre style="margin: 0;"> <span id="LC167" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">ifErrsM</span> <span class="p">(</span><span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="c1" style="color: #998; font-style: italic;">-- Don't lint when there are errors, because</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="177" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

177

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<td class="diff-line-num new_line" data-linenumber="168" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

168

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<pre style="margin: 0;"> <span id="LC168" class="line" lang="haskell">                               <span class="c1" style="color: #998; font-style: italic;">-- errors might mean TcTyCons.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="178" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

178

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<td class="diff-line-num new_line" data-linenumber="169" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

169

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<pre style="margin: 0;"> <span id="LC169" class="line" lang="haskell">                               <span class="c1" style="color: #998; font-style: italic;">-- See Note [Recover from validity error] in GHC.Tc.TyCl</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="179" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

179

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<td class="diff-line-num new_line" data-linenumber="170" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

170

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<pre style="margin: 0;"> <span id="LC170" class="line" lang="haskell">         <span class="n" style="color: #333;">when</span> <span class="p">(</span><span class="n" style="color: #333;">gopt</span> <span class="kt" style="color: #458; font-weight: 600;">Opt_DoCoreLinting</span> <span class="n" style="color: #333;">dflags</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

180

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<td class="diff-line-num new_line old" data-linenumber="171" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC180" class="line" lang="haskell">           <span class="c1" style="color: #998; font-style: italic;">-- Check that the types involved in this instance are well formed.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="181" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

181

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<td class="diff-line-num new_line old" data-linenumber="171" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC181" class="line" lang="haskell">           <span class="c1" style="color: #998; font-style: italic;">-- Do /not/ expand type synonyms, for the reasons discussed in</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="182" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

182

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<td class="diff-line-num new_line old" data-linenumber="171" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC182" class="line" lang="haskell">           <span class="c1" style="color: #998; font-style: italic;">-- Note [Linting type synonym applications].</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="183" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

183

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<td class="diff-line-num new_line old" data-linenumber="171" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC183" class="line" lang="haskell">           <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">lintTypes</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">tcvs'</span> <span class="p">(</span><span class="n" style="color: #333;">rhs'</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">lhs'</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="184" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="171" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

171

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<pre style="margin: 0;">+<span id="LC171" class="line" lang="haskell">         <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">lintAxiom</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">axiom</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="184" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

184

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<td class="diff-line-num new_line" data-linenumber="172" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

172

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<pre style="margin: 0;"> <span id="LC172" class="line" lang="haskell">             <span class="kt" style="color: #458; font-weight: 600;">Nothing</span>       <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="185" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="173" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

173

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<pre style="margin: 0;"> <span id="LC173" class="line" lang="haskell">             <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">fail_msg</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"Core Lint error in newFamInst"</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="186" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

186

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<td class="diff-line-num new_line" data-linenumber="174" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

174

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<pre style="margin: 0;"> <span id="LC174" class="line" lang="haskell">                              <span class="n" style="color: #333;">vcat</span> <span class="p">[</span> <span class="n" style="color: #333;">fail_msg</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="187" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="175" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

175

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<pre style="margin: 0;"> <span id="LC175" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fam_tc</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="188" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="176" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC188" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">subst</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="189" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

189

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<td class="diff-line-num new_line old" data-linenumber="176" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC189" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tvs'</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="190" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC190" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">cvs'</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC191" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lhs'</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC192" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rhs'</span> <span class="p">]</span></span>

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<pre style="margin: 0;">+<span id="LC176" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tvs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC177" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">cvs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC178" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lhs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC179" class="line" lang="haskell">                                   <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rhs</span> <span class="p">]</span></span>

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<pre style="margin: 0;">+<span id="LC180" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC181" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Freshen the type variables</span></span>

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<pre style="margin: 0;">+<span id="LC182" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">subst</span><span class="p">,</span> <span class="n" style="color: #333;">tvs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">freshenTyVarBndrs</span> <span class="n" style="color: #333;">tvs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC183" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">subst</span><span class="p">,</span> <span class="n" style="color: #333;">cvs'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">freshenCoVarBndrsX</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">cvs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC184" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">lhs'</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTys</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">lhs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC185" class="line" lang="haskell">             <span class="n" style="color: #333;">rhs'</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span>  <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">rhs</span></span>

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<pre style="margin: 0;"> <span id="LC186" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">FamInst</span> <span class="p">{</span> <span class="n" style="color: #333;">fi_fam</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConName</span> <span class="n" style="color: #333;">fam_tc</span></span>

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<pre style="margin: 0;"> <span id="LC187" class="line" lang="haskell">                         <span class="p">,</span> <span class="n" style="color: #333;">fi_flavor</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">flavor</span></span>

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<pre style="margin: 0;"> <span id="LC188" class="line" lang="haskell">                         <span class="p">,</span> <span class="n" style="color: #333;">fi_tcs</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">roughMatchTcs</span> <span class="n" style="color: #333;">lhs</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="192" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -199,10 +192,6 @@ newFamInst flavor axiom@(CoAxiom { co_ax_tc = fam_tc })</td>

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<pre style="margin: 0;"> <span id="LC192" class="line" lang="haskell">                         <span class="p">,</span> <span class="n" style="color: #333;">fi_rhs</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs'</span></span>

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<pre style="margin: 0;"> <span id="LC193" class="line" lang="haskell">                         <span class="p">,</span> <span class="n" style="color: #333;">fi_axiom</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">axiom</span> <span class="p">})</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="201" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

201

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<td class="diff-line-num new_line" data-linenumber="194" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

194

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<pre style="margin: 0;"> <span id="LC194" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

202

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<td class="diff-line-num new_line old" data-linenumber="195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC202" class="line" lang="haskell">    <span class="n" style="color: #333;">lhs_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcTypeKind</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">lhs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="203" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

203

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<td class="diff-line-num new_line old" data-linenumber="195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC203" class="line" lang="haskell">    <span class="n" style="color: #333;">rhs_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcTypeKind</span> <span class="n" style="color: #333;">rhs</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

204

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<td class="diff-line-num new_line old" data-linenumber="195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC204" class="line" lang="haskell">    <span class="n" style="color: #333;">tcv_set</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">tvs</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">cvs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="205" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

205

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<td class="diff-line-num new_line old" data-linenumber="195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC205" class="line" lang="haskell">    <span class="n" style="color: #333;">pp_ax</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprCoAxiom</span> <span class="n" style="color: #333;">axiom</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

206

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<td class="diff-line-num new_line" data-linenumber="195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

195

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<pre style="margin: 0;"> <span id="LC195" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">CoAxBranch</span> <span class="p">{</span> <span class="n" style="color: #333;">cab_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tvs</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

207

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<td class="diff-line-num new_line" data-linenumber="196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

196

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<pre style="margin: 0;"> <span id="LC196" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">cab_cvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cvs</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

208

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<td class="diff-line-num new_line" data-linenumber="197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

197

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<pre style="margin: 0;"> <span id="LC197" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">cab_lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lhs</span></span>

</pre>

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</li>

<li id="e65390fa5a32c453a81a1c9a3e1c4464d155ca4a">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#e65390fa5a32c453a81a1c9a3e1c4464d155ca4a"><strong>compiler/GHC/Tc/Module.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2896" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2896" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2896,7 +2896,7 @@ pprTcGblEnv (TcGblEnv { tcg_type_env  = type_env,</td>

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<td class="diff-line-num old_line" data-linenumber="2896" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2896

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<td class="diff-line-num new_line" data-linenumber="2896" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2896

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<pre style="margin: 0;"> <span id="LC2896" class="line" lang="haskell">                <span class="n" style="color: #333;">pprUFM</span> <span class="p">(</span><span class="n" style="color: #333;">imp_dep_mods</span> <span class="n" style="color: #333;">imports</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">sort</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2897" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2897

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<td class="diff-line-num new_line" data-linenumber="2897" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2897

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<pre style="margin: 0;"> <span id="LC2897" class="line" lang="haskell">         <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Dependent packages:"</span> <span class="o" style="font-weight: 600;"><+></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2898" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2898

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<td class="diff-line-num new_line" data-linenumber="2898" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2898

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<pre style="margin: 0;"> <span id="LC2898" class="line" lang="haskell">                <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">S</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">imp_dep_pkgs</span> <span class="n" style="color: #333;">imports</span><span class="p">)]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2899" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2899

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<td class="diff-line-num new_line old" data-linenumber="2899" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2899" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;"><span class="idiff left right">where</span></span>         <span class="c1" style="color: #998; font-style: italic;">-- The use of sort is just to reduce unnecessary</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2900" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2899" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC2899" class="line" lang="haskell">  <span class="idiff left right">     </span>         <span class="c1" style="color: #998; font-style: italic;">-- The use of sort is just to reduce unnecessary</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2900" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2900

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<td class="diff-line-num new_line" data-linenumber="2900" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2900

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<pre style="margin: 0;"> <span id="LC2900" class="line" lang="haskell">                <span class="c1" style="color: #998; font-style: italic;">-- wobbling in testsuite output</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2901" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2901

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<td class="diff-line-num new_line" data-linenumber="2901" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2901

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<pre style="margin: 0;"> <span id="LC2901" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2902" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2902

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<td class="diff-line-num new_line" data-linenumber="2902" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2902

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<pre style="margin: 0;"> <span id="LC2902" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_rules</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LRuleDecl</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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</li>

<li id="83d23a46bb6cdc8b1edc16f1fd2c8f5c53e2c9ca">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#83d23a46bb6cdc8b1edc16f1fd2c8f5c53e2c9ca"><strong>compiler/GHC/Tc/TyCl.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1789,6 +1789,276 @@ and take the wired-in information.  That avoids complications.</td>

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1789

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<pre style="margin: 0;"> <span id="LC1789" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">e.g. the need to make the data constructor worker name for</span></span>

</pre>

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1790

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1790

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<pre style="margin: 0;"> <span id="LC1790" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     a constraint tuple match the wired-in one</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1791" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1791

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1791

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<pre style="margin: 0;"> <span id="LC1791" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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1792

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<pre style="margin: 0;">+<span id="LC1792" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Datatype return kinds]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1793" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1793

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<pre style="margin: 0;">+<span id="LC1793" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1794" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1794

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<pre style="margin: 0;">+<span id="LC1794" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There are several poorly lit corners around datatype/newtype return kinds.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1795" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1795

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<pre style="margin: 0;">+<span id="LC1795" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This Note explains these.  We cover data/newtype families and instances</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1796" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1796

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<pre style="margin: 0;">+<span id="LC1796" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in Note [Data family/instance return kinds].</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1797" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1797

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<pre style="margin: 0;">+<span id="LC1797" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1798" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">data    T a :: <kind> where ...   -- See Point DT4</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1799" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1799

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<pre style="margin: 0;">+<span id="LC1799" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">newtype T a :: <kind> where ...   -- See Point DT5</span></span>

</pre>

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1800

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<pre style="margin: 0;">+<span id="LC1800" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1801" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1801

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<pre style="margin: 0;">+<span id="LC1801" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DT1 Where this applies: Only GADT syntax for data/newtype/instance declarations</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1802" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1802

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<pre style="margin: 0;">+<span id="LC1802" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    can have declared return kinds. This Note does not apply to Haskell98</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1803" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1803

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<pre style="margin: 0;">+<span id="LC1803" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    syntax.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1804" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1804

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<pre style="margin: 0;">+<span id="LC1804" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1805" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1805

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<pre style="margin: 0;">+<span id="LC1805" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DT2 Where these kinds come from: Return kinds are processed through several</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1806" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1806

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<pre style="margin: 0;">+<span id="LC1806" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    different code paths:</span></span>

</pre>

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1807

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<pre style="margin: 0;">+<span id="LC1807" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1808" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1808

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<pre style="margin: 0;">+<span id="LC1808" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Data/newtypes: The return kind is part of the TyCon kind, gotten either</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1809" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1809

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<pre style="margin: 0;">+<span id="LC1809" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     by checkInitialKind (standalone kind signature / CUSK) or</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1810" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1810

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<pre style="margin: 0;">+<span id="LC1810" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     inferInitialKind. It is extracted by bindTyClTyVars in tcTyClDecl1. It is</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1811" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1811

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<pre style="margin: 0;">+<span id="LC1811" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     then passed to tcDataDefn.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1812" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1812

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<pre style="margin: 0;">+<span id="LC1812" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1813" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1813

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<pre style="margin: 0;">+<span id="LC1813" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Families: The return kind is either written in a standalone signature</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1814" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1814

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<pre style="margin: 0;">+<span id="LC1814" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     or extracted from a family declaration in getInitialKind.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1815" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1815

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<pre style="margin: 0;">+<span id="LC1815" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     If a family declaration is missing a result kind, it is assumed to be</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1816" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1816

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<pre style="margin: 0;">+<span id="LC1816" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     Type. This assumption is in getInitialKind for CUSKs or</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1817" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1817

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<pre style="margin: 0;">+<span id="LC1817" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     get_fam_decl_initial_kind for non-signature & non-CUSK cases.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1818" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1818

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<pre style="margin: 0;">+<span id="LC1818" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1819" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1819

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<pre style="margin: 0;">+<span id="LC1819" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Instances: The data family already has a known kind. The return kind</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1820" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1820

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<pre style="margin: 0;">+<span id="LC1820" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     of an instance is then calculated by applying the data family tycon</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1821" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1821

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<pre style="margin: 0;">+<span id="LC1821" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     to the patterns provided, as computed by the typeKind lhs_ty in the</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1822" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1822

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<pre style="margin: 0;">+<span id="LC1822" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     end of tcDataFamInstHeader. In the case of an instance written in GADT</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1823" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1823

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<pre style="margin: 0;">+<span id="LC1823" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     syntax, there are potentially *two* return kinds: the one computed from</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1824" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1824

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<pre style="margin: 0;">+<span id="LC1824" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     applying the data family tycon to the patterns, and the one given by</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1825" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1825

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<pre style="margin: 0;">+<span id="LC1825" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     the user. This second kind is checked by the tc_kind_sig function within</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1826" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1826

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<pre style="margin: 0;">+<span id="LC1826" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     tcDataFamInstHeader.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1827" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1827

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<pre style="margin: 0;">+<span id="LC1827" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1828" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1828

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<pre style="margin: 0;">+<span id="LC1828" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DT3 Eta-expansion: Any forall-bound variables and function arguments in a result kind</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1829" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1829

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<pre style="margin: 0;">+<span id="LC1829" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    become parameters to the type. That is, when we say</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1830" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1830

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<pre style="margin: 0;">+<span id="LC1830" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1831" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1831

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<pre style="margin: 0;">+<span id="LC1831" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T a :: Type -> Type where ...</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1832" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1832

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<pre style="margin: 0;">+<span id="LC1832" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1833" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1833

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<pre style="margin: 0;">+<span id="LC1833" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    we really mean for T to have two parameters. The second parameter</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1834" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1834

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<pre style="margin: 0;">+<span id="LC1834" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    is produced by processing the return kind in etaExpandAlgTyCon,</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1835" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1835

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<pre style="margin: 0;">+<span id="LC1835" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    called in tcDataDefn for data/newtypes and in tcDataFamInstDecl</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1836" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1836

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<pre style="margin: 0;">+<span id="LC1836" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    for instances. This is true for data families as well, though their</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1837" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1837

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<pre style="margin: 0;">+<span id="LC1837" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    arity only matters for pretty-printing.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1838" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1838

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<pre style="margin: 0;">+<span id="LC1838" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1839" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1839

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<pre style="margin: 0;">+<span id="LC1839" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    See also Note [TyConBinders for the result kind signatures of a data type]</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1840" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1840

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<pre style="margin: 0;">+<span id="LC1840" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    in GHC.Tc.Gen.HsType.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1841" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1841

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<pre style="margin: 0;">+<span id="LC1841" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1842" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1842

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<pre style="margin: 0;">+<span id="LC1842" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DT4 Datatype return kind restriction: A data type return kind must end</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1843" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1843

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<pre style="margin: 0;">+<span id="LC1843" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    in a type that, after type-synonym expansion, yields `TYPE LiftedRep`. By</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1844" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1844

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<pre style="margin: 0;">+<span id="LC1844" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    "end in", we mean we strip any foralls and function arguments off before</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1845" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1845

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<pre style="margin: 0;">+<span id="LC1845" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    checking.</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1846" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1846

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<pre style="margin: 0;">+<span id="LC1846" class="line" lang="haskell"></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1847" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1847

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<pre style="margin: 0;">+<span id="LC1847" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Examples:</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1848" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1848

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<pre style="margin: 0;">+<span id="LC1848" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data T1 :: Type                          -- good</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1849" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1849

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<pre style="margin: 0;">+<span id="LC1849" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data T2 :: Bool -> Type                  -- good</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1850" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1850

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<pre style="margin: 0;">+<span id="LC1850" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data T3 :: Bool -> forall k. Type        -- strange, but still accepted</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1851" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1851

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<pre style="margin: 0;">+<span id="LC1851" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data T4 :: forall k. k -> Type           -- good</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1852" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1852

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<pre style="margin: 0;">+<span id="LC1852" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data T5 :: Bool                          -- bad</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1853" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1853

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<pre style="margin: 0;">+<span id="LC1853" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data T6 :: Type -> Bool                  -- bad</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1854" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1854

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<pre style="margin: 0;">+<span id="LC1854" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1855" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1855

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<pre style="margin: 0;">+<span id="LC1855" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Exactly the same applies to data instance (but not data family)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1856" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1856

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<pre style="margin: 0;">+<span id="LC1856" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    declarations.  Examples</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1857" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1857

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<pre style="margin: 0;">+<span id="LC1857" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data instance D1 :: Type                 -- good</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1858" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1858

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<pre style="margin: 0;">+<span id="LC1858" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data instance D2 :: Boool -> Type        -- good</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1859" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1859

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<pre style="margin: 0;">+<span id="LC1859" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1860" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1860

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<pre style="margin: 0;">+<span id="LC1860" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    We can "look through" type synonyms</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1861" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1861

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<pre style="margin: 0;">+<span id="LC1861" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      type Star = Type</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1862" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1862

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<pre style="margin: 0;">+<span id="LC1862" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data T7 :: Bool -> Star                  -- good (synonym expansion ok)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1863" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1863

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<pre style="margin: 0;">+<span id="LC1863" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      type Arrow = (->)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1864" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1864

</td>

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<pre style="margin: 0;">+<span id="LC1864" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data T8 :: Arrow Bool Type               -- good (ditto)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1865" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1865

</td>

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<pre style="margin: 0;">+<span id="LC1865" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1866" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1866

</td>

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<pre style="margin: 0;">+<span id="LC1866" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    But we specifically do *not* do type family reduction here.</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1867" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1867

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<pre style="margin: 0;">+<span id="LC1867" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      type family ARROW where</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1868" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1868

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<pre style="margin: 0;">+<span id="LC1868" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        ARROW = (->)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1869" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1869

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<pre style="margin: 0;">+<span id="LC1869" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data T9 :: ARROW Bool Type               -- bad</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1870" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1870

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<pre style="margin: 0;">+<span id="LC1870" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1871" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1871

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<pre style="margin: 0;">+<span id="LC1871" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      type family F a where</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1872" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1872

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<pre style="margin: 0;">+<span id="LC1872" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        F Int  = Bool</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1873" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1873

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<pre style="margin: 0;">+<span id="LC1873" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        F Bool = Type</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1874" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1874

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<pre style="margin: 0;">+<span id="LC1874" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data T10 :: Bool -> F Bool               -- bad</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1875" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1875

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<pre style="margin: 0;">+<span id="LC1875" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1876" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1876

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<pre style="margin: 0;">+<span id="LC1876" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    The /principle/ here is that in the TyCon for a data type or data instance,</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1877" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1877

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<pre style="margin: 0;">+<span id="LC1877" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    we must be able to lay out all the type-variable binders, one by one, until</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1878" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1878

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<pre style="margin: 0;">+<span id="LC1878" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    we reach (TYPE xx).  There is no place for a cast here.  We could add one,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1879" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1879

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<pre style="margin: 0;">+<span id="LC1879" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    but let's not!</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1880" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1880

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<pre style="margin: 0;">+<span id="LC1880" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1881" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1881

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<pre style="margin: 0;">+<span id="LC1881" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    This check is done in checkDataKindSig. For data declarations, this</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1882" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1882

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<pre style="margin: 0;">+<span id="LC1882" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    call is in tcDataDefn; for data instances, this call is in tcDataFamInstDecl.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1883" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1883

</td>

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<pre style="margin: 0;">+<span id="LC1883" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1884" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1884

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<pre style="margin: 0;">+<span id="LC1884" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DT5 Newtype return kind restriction.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1885" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1885

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<pre style="margin: 0;">+<span id="LC1885" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    If -XUnliftedNewtypes is not on, then newtypes are treated just</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1886" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1886

</td>

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<pre style="margin: 0;">+<span id="LC1886" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    like datatypes --- see (4) above.</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1887" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1887

</td>

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<pre style="margin: 0;">+<span id="LC1887" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1888" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1888

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<pre style="margin: 0;">+<span id="LC1888" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1889" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1889

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<pre style="margin: 0;">+<span id="LC1889" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    If -XUnliftedNewtypes is on, then a newtype return kind must end in</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1890" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1890

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<pre style="margin: 0;">+<span id="LC1890" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    TYPE xyz, for some xyz (after type synonym expansion). The "xyz"</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1891" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1891

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1891" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    may include type families, but the TYPE part must be visible</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1892" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1892

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<pre style="margin: 0;">+<span id="LC1892" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    /without/ expanding type families (only synonyms).</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1893" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1893

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<pre style="margin: 0;">+<span id="LC1893" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1894" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1894

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<pre style="margin: 0;">+<span id="LC1894" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    This kind is unified with the kind of the representation type (the</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1895" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1895

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1895" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    type of the one argument to the one constructor). See also steps</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1896" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1896

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<pre style="margin: 0;">+<span id="LC1896" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (2) and (3) of Note [Implementation of UnliftedNewtypes].</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1897" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1897

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<pre style="margin: 0;">+<span id="LC1897" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1898" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1898

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<pre style="margin: 0;">+<span id="LC1898" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    The checks are done in the same places as for datatypes.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1899" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1899

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<pre style="margin: 0;">+<span id="LC1899" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Examples (assume -XUnliftedNewtypes):</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1900" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1900

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<pre style="margin: 0;">+<span id="LC1900" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1901" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1901

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<pre style="margin: 0;">+<span id="LC1901" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      newtype N1 :: Type                       -- good</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1902" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1902

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<pre style="margin: 0;">+<span id="LC1902" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      newtype N2 :: Bool -> Type               -- good</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1903" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1903

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<pre style="margin: 0;">+<span id="LC1903" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      newtype N3 :: forall r. Bool -> TYPE r   -- good</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1904" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1904

</td>

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<pre style="margin: 0;">+<span id="LC1904" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1905" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1905

</td>

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<pre style="margin: 0;">+<span id="LC1905" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      type family F (t :: Type) :: RuntimeRep</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1906" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1906

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<pre style="margin: 0;">+<span id="LC1906" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      newtype N4 :: forall t -> TYPE (F t)     -- good</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1907" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1907

</td>

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<pre style="margin: 0;">+<span id="LC1907" class="line" lang="haskell"></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1908" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1908

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<pre style="margin: 0;">+<span id="LC1908" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      type family STAR where</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1909" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1909

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<pre style="margin: 0;">+<span id="LC1909" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        STAR = Type</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1910" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1910

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<pre style="margin: 0;">+<span id="LC1910" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      newtype N5 :: Bool -> STAR               -- bad</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1911" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1911

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<pre style="margin: 0;">+<span id="LC1911" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1912" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1912

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<pre style="margin: 0;">+<span id="LC1912" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Data family/instance return kinds]</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1913" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1913

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<pre style="margin: 0;">+<span id="LC1913" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1914" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1914

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<pre style="margin: 0;">+<span id="LC1914" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Within this note, understand "instance" to mean data or newtype</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1915" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1915

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<pre style="margin: 0;">+<span id="LC1915" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">instance, and understand "family" to mean data family. No type</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1916" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1916

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<pre style="margin: 0;">+<span id="LC1916" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">families or classes here. Some examples:</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1917" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1917

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<pre style="margin: 0;">+<span id="LC1917" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1918" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1918

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<pre style="margin: 0;">+<span id="LC1918" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">data family T a :: <kind>          -- See Point DF56</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1919" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1919

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<pre style="margin: 0;">+<span id="LC1919" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1920" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1920

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<pre style="margin: 0;">+<span id="LC1920" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">data    instance T [a] :: <kind> where ...   -- See Point DF2</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1921" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1921

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<pre style="margin: 0;">+<span id="LC1921" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">newtype instance T [a] :: <kind> where ...   -- See Point DF2</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1922" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1922

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<pre style="margin: 0;">+<span id="LC1922" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1923" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1923

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<pre style="margin: 0;">+<span id="LC1923" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Here is the Plan for Data Families</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1924" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1924

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<pre style="margin: 0;">+<span id="LC1924" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1925" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1925

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<pre style="margin: 0;">+<span id="LC1925" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DF1 In a data/newtype instance, we treat the kind of the /data family/,</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1926" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1926

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<pre style="margin: 0;">+<span id="LC1926" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    once instantiated, as the "master kind" for the representation</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1927" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1927

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<pre style="margin: 0;">+<span id="LC1927" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    TyCon.  For example:</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1928" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1928

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<pre style="margin: 0;">+<span id="LC1928" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data family T1 :: Type -> Type -> Type</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1929" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1929

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<pre style="margin: 0;">+<span id="LC1929" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data instance T1 Int :: F Bool -> Type where ...</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1930" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1930

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<pre style="margin: 0;">+<span id="LC1930" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    The "master kind" for the representation TyCon R:T1Int comes</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1931" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1931

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<pre style="margin: 0;">+<span id="LC1931" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    from T1, not from the signature on the data instance.  It is as</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1932" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1932

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<pre style="margin: 0;">+<span id="LC1932" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    if we declared</span></span>

</pre>

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</td>

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1933

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<pre style="margin: 0;">+<span id="LC1933" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data R:T1Int :: Type -> Type where ...</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1934" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1934

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<pre style="margin: 0;">+<span id="LC1934" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     See Note [Liberalising data family return kinds] for an alternative</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1935" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1935

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<pre style="margin: 0;">+<span id="LC1935" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     plan.  But this plan is simple, and ensures that all instances</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1936" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1936

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<pre style="margin: 0;">+<span id="LC1936" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     are simple instantiations of the matster, without strange casts.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1937" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1937

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<pre style="margin: 0;">+<span id="LC1937" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1938" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1938

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<pre style="margin: 0;">+<span id="LC1938" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     An example with non-trivial instantiation:</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1939" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1939

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<pre style="margin: 0;">+<span id="LC1939" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data family T2 :: forall k. Type -> k</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1940" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1940

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<pre style="margin: 0;">+<span id="LC1940" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data instance T :: Type -> Type -> Type where ...</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1941" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1941

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<pre style="margin: 0;">+<span id="LC1941" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     Here 'k' gets instantiated with (Type -> Type), driven by</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1942" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1942

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<pre style="margin: 0;">+<span id="LC1942" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     the signature on the 'data instance'</span></span>

</pre>

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</td>

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1943

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<pre style="margin: 0;">+<span id="LC1943" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1944" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1944

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<pre style="margin: 0;">+<span id="LC1944" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     A newtype example:</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1945" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1945

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<pre style="margin: 0;">+<span id="LC1945" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1946" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1946

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<pre style="margin: 0;">+<span id="LC1946" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       data Color = Red | Blue</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1947" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1947

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<pre style="margin: 0;">+<span id="LC1947" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       type family Interpret (x :: Color) :: RuntimeRep where</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1948" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1948

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<pre style="margin: 0;">+<span id="LC1948" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         Interpret 'Red = 'IntRep</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1949" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1949

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<pre style="margin: 0;">+<span id="LC1949" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         Interpret 'Blue = 'WordRep</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1950" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1950

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<pre style="margin: 0;">+<span id="LC1950" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       data family Foo (x :: Color) :: TYPE (Interpret x)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1951" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1951

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<pre style="margin: 0;">+<span id="LC1951" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       newtype instance Foo 'Red :: TYPE IntRep where</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1952" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1952

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<pre style="margin: 0;">+<span id="LC1952" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         FooRedC :: Int# -> Foo 'Red</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1953" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1953

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<pre style="margin: 0;">+<span id="LC1953" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1954" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1954

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<pre style="margin: 0;">+<span id="LC1954" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Here we get that Foo 'Red :: TYPE (Interpret Red), and our</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1955" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1955

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<pre style="margin: 0;">+<span id="LC1955" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    representation newtype looks like</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1956" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1956

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<pre style="margin: 0;">+<span id="LC1956" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         newtype R:FooRed :: TYPE (Interpret Red) where</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1957" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1957

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<pre style="margin: 0;">+<span id="LC1957" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            FooRedC :: Int# -> R:FooRed</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1958" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1958

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<pre style="margin: 0;">+<span id="LC1958" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Remember: the master kind comes from the /family/ tycon.</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1959" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1959

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1959" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1960" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1960

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1960" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DF2 /After/ this instantiation, the return kind of the master kind</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1961" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1961

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1961" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    must obey the usual rules for data/newtype return kinds (DT4, DT5)</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1962" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1962

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1962" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    above.  Examples:</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1963" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1963

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1963" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data family T3 k :: k</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1964" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1964

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1964" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data instance T3 Type where ...          -- OK</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1965" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1965

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1965" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data instance T3 (Type->Type) where ...  -- OK</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1966" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1966

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1966" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data instance T3 (F Int) where ...       -- Not OK</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1967" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1967

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1967" class="line" lang="haskell"></span>

</pre>

</td>

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1968

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<pre style="margin: 0;">+<span id="LC1968" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DF3 Any kind signatures on the data/newtype instance are checked for</span></span>

</pre>

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</td>

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1969

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<pre style="margin: 0;">+<span id="LC1969" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    equality with the master kind (and hence may guide instantiation)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1970" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1970

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<pre style="margin: 0;">+<span id="LC1970" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    but are otherwise ignored. So in the T1 example above, we check</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1971" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1971

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<pre style="margin: 0;">+<span id="LC1971" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    that (F Int ~ Type) by unification; but otherwise ignore the</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1972" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1972

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<pre style="margin: 0;">+<span id="LC1972" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    user-supplied signature from the /family/ not the /instance/.</span></span>

</pre>

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</td>

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1973

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<pre style="margin: 0;">+<span id="LC1973" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1974" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1974

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<pre style="margin: 0;">+<span id="LC1974" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    We must be sure to instantiate any trailing invisible binders</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1975" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1975

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<pre style="margin: 0;">+<span id="LC1975" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    before doing this unification.  See the call to tcInstInvisibleBinders</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1976" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1976

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<pre style="margin: 0;">+<span id="LC1976" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    in tcDataFamInstHeader. For example:</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1977" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1977

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<pre style="margin: 0;">+<span id="LC1977" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       data family D :: forall k. k</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1978" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1978

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<pre style="margin: 0;">+<span id="LC1978" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       data instance D :: Type               -- forall k. k   <:  Type</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1979" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1979

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<pre style="margin: 0;">+<span id="LC1979" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       data instance D :: Type -> Type       -- forall k. k   <:  Type -> Type</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1980" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1980

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<pre style="margin: 0;">+<span id="LC1980" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">         -- NB: these do not overlap</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1981" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1981

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<pre style="margin: 0;">+<span id="LC1981" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    we must instantiate D before unifying with the signature in the</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1982" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1982

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<pre style="margin: 0;">+<span id="LC1982" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    data instance declaration</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1983" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1983

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<pre style="margin: 0;">+<span id="LC1983" class="line" lang="haskell"></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1984" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1984

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<pre style="margin: 0;">+<span id="LC1984" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DF4 We also (redundantly) check that any user-specified return kind</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1985" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1985

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<pre style="margin: 0;">+<span id="LC1985" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    signature in the data instance also obeys (4).  For example we</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1986" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1986

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<pre style="margin: 0;">+<span id="LC1986" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    reject</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1987" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1987

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<pre style="margin: 0;">+<span id="LC1987" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data family T1 :: Type -> Type -> Type</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1988" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1988

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<pre style="margin: 0;">+<span id="LC1988" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        data instance T1 Int :: Type -> F Int</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1989" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1989

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<pre style="margin: 0;">+<span id="LC1989" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    even if (F Int ~ Bool).  We could omit this check, because we</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1990" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1990

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<pre style="margin: 0;">+<span id="LC1990" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    use the master kind; but it seems more uniform to check it, again</span></span>

</pre>

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1991

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<pre style="margin: 0;">+<span id="LC1991" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    with checkDataKindSig.</span></span>

</pre>

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1992

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<pre style="margin: 0;">+<span id="LC1992" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1993" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1993

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<pre style="margin: 0;">+<span id="LC1993" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DF5 Data /family/ return kind restrictions. Consider</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1994" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1994

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<pre style="margin: 0;">+<span id="LC1994" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       data family D8 a :: F a</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1995" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1995

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<pre style="margin: 0;">+<span id="LC1995" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    where F is a type family.  No data/newtype instance can instantiate</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1996" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1996

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<pre style="margin: 0;">+<span id="LC1996" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    this so that it obeys the rules of (4) and (5).  So GHC proactively</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1997" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1997

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<pre style="margin: 0;">+<span id="LC1997" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    rejects the data /family/ declaration if it can never satisfy (DT4)/(DT5).</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1998" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1998

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<pre style="margin: 0;">+<span id="LC1998" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Remember that a data family supports both data and newtype instances.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1999" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1999

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<pre style="margin: 0;">+<span id="LC1999" class="line" lang="haskell"></span>

</pre>

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</td>

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2000

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<pre style="margin: 0;">+<span id="LC2000" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    More precisely, the return kind of a data family must be either</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2001" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2001

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<pre style="margin: 0;">+<span id="LC2001" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        * TYPE xyz (for some type xyz) or</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2002" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2002

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<pre style="margin: 0;">+<span id="LC2002" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        * a kind variable</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2003" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2003

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<pre style="margin: 0;">+<span id="LC2003" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    Only in these cases can a data/newtype instance possibly satisfy (4)/(5).</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2004" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2004

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<pre style="margin: 0;">+<span id="LC2004" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    This is checked by the call to checkDataKindSig in tcFamDecl1.  Examples:</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2005" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2005

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<pre style="margin: 0;">+<span id="LC2005" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2006" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2006

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<pre style="margin: 0;">+<span id="LC2006" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data family D1 :: Type              -- good</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2007" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2007

</td>

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<pre style="margin: 0;">+<span id="LC2007" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data family D2 :: Bool -> Type      -- good</span></span>

</pre>

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2008

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<pre style="margin: 0;">+<span id="LC2008" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data family D3 k :: k               -- good</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2009" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2009

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<pre style="margin: 0;">+<span id="LC2009" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data family D4 :: forall k -> k     -- good</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2010" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2010

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<pre style="margin: 0;">+<span id="LC2010" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data family D5 :: forall k. k -> k  -- good</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2011" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2011

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<pre style="margin: 0;">+<span id="LC2011" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data family D6 :: forall r. TYPE r  -- good</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2012" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2012

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<pre style="margin: 0;">+<span id="LC2012" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data family D7 :: Bool -> STAR      -- bad (see STAR from point 5)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2013" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2013

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<pre style="margin: 0;">+<span id="LC2013" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2014" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2014

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<pre style="margin: 0;">+<span id="LC2014" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DF6 Two return kinds for instances: If an instance has two return kinds,</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2015" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2015

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<pre style="margin: 0;">+<span id="LC2015" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    one from the family declaration and one from the instance declaration</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2016" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2016

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<pre style="margin: 0;">+<span id="LC2016" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (see point (2) above), they are unified. More accurately, we make sure</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2017" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2017

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<pre style="margin: 0;">+<span id="LC2017" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    that the kind of the applied data family is a subkind of the user-written</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2018" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2018

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<pre style="margin: 0;">+<span id="LC2018" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    kind. GHC.Tc.Gen.HsType.checkExpectedKind normally does this check for types, but</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2019" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2019

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<pre style="margin: 0;">+<span id="LC2019" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    that's overkill for our needs here. Instead, we just instantiate any</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2020

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<pre style="margin: 0;">+<span id="LC2020" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    invisible binders in the (instantiated) kind of the data family</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2021" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2021

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<pre style="margin: 0;">+<span id="LC2021" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (called lhs_kind in tcDataFamInstHeader) with tcInstInvisibleTyBinders</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2022" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2022

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<pre style="margin: 0;">+<span id="LC2022" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    and then unify the resulting kind with the kind written by the user.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2023" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2023

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<pre style="margin: 0;">+<span id="LC2023" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    This unification naturally produces a coercion, which we can drop, as</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2024" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2024

</td>

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<pre style="margin: 0;">+<span id="LC2024" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    the kind annotation on the instance is redundant (except perhaps for</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2025" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2025

</td>

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<pre style="margin: 0;">+<span id="LC2025" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    effects of unification).</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2026" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2026

</td>

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<pre style="margin: 0;">+<span id="LC2026" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2027" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2027

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2027" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2028" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2028

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2028" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2029" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2029

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2029" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    This all is Wrinkle (3) in Note [Implementation of UnliftedNewtypes].</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2030" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2030

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2030" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2031" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2031

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2031" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Liberalising data family return kinds]</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2032" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2032

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2032" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2033

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2033" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Could we allow this?</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2034" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2034

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2034" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   type family F a where { F Int = Type }</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2035" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2035

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2035" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data family T a :: F a</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2036" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2036

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2036" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data instance T Int where</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2037" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2037

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2037" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      MkT :: T Int</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2038" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2038

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2038" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2039" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2039

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2039" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In the 'data instance', T Int :: F Int, and F Int = Type, so all seems</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2040" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2040

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2040" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">well.  But there are lots of complications:</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2041" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2041

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2041" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2042" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2042

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2042" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The representation constructor R:TInt presumably has kind Type.</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2043" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2043

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2043" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  So the axiom connecting the two would have to look like</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2044" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2044

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2044" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       axTInt :: T Int ~ R:TInt |> sym axFInt</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2045" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2045

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2045" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  and that doesn't match expectation in DataFamInstTyCon</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2046" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2046

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2046" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  in AlgTyConFlav</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2047" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2047

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<pre style="margin: 0;">+<span id="LC2047" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2048" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2048

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<pre style="margin: 0;">+<span id="LC2048" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The wrapper can't have type</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2049" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2049

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<pre style="margin: 0;">+<span id="LC2049" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     $WMkT :: Int -> T Int</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2050" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2050

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<pre style="margin: 0;">+<span id="LC2050" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  because T Int has the wrong kind.  It would have to be</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2051" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2051

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<pre style="margin: 0;">+<span id="LC2051" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     $WMkT :: Int -> (T Int) |> axFInt</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2052

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2052" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2053" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2053

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2053" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The code for $WMkT would also be more complicated, needing</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2054" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2054

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<pre style="margin: 0;">+<span id="LC2054" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  two coherence coercions. Try it!</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2055" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2055

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2055" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2056" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2056

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<pre style="margin: 0;">+<span id="LC2056" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Code for pattern matching would be complicated in an</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2057" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2057

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<pre style="margin: 0;">+<span id="LC2057" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  exactly dual way.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2058" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2058

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2058" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2059" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2059

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<pre style="margin: 0;">+<span id="LC2059" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So yes, we could allow this, but we currently do not. That's</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2060" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2060

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<pre style="margin: 0;">+<span id="LC2060" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">why we have</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2061" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2061

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2061" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1792

</td>

<td class="diff-line-num new_line" data-linenumber="2062" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2062

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<pre style="margin: 0;"> <span id="LC2062" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Implementation of UnliftedNewtypes]</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1793" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1793

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<td class="diff-line-num new_line" data-linenumber="2063" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2063

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<pre style="margin: 0;"> <span id="LC2063" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1794" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1794

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<td class="diff-line-num new_line" data-linenumber="2064" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2064

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<pre style="margin: 0;"> <span id="LC2064" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Expected behavior of UnliftedNewtypes:</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1865" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2135" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1865,11 +2135,12 @@ Wrinkle: Consider (#17021, typecheck/should_fail/T17021)</td>

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<td class="diff-line-num old_line" data-linenumber="1865" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1865

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<td class="diff-line-num new_line" data-linenumber="2135" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2135

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<pre style="margin: 0;"> <span id="LC2135" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    newtype T :: TYPE (Id LiftedRep) where</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1866" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1866

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<td class="diff-line-num new_line" data-linenumber="2136" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2136

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<pre style="margin: 0;"> <span id="LC2136" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      MkT :: Int -> T</span></span>

</pre>

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1867

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<td class="diff-line-num new_line" data-linenumber="2137" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2137

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<pre style="margin: 0;"> <span id="LC2137" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1868" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1868

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<td class="diff-line-num new_line old" data-linenumber="2138" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1868" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  In the type of MkT, we must end with (Int |> TYPE (sym axId)) -> T, never Int -> (T |></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1869" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1869

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<td class="diff-line-num new_line old" data-linenumber="2138" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1869" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  TYPE axId); otherwise, the result type of the constructor wouldn't match the</span></span>

</pre>

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1870

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<td class="diff-line-num new_line old" data-linenumber="2138" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1870" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  datatype. However, type-checking the HsType T might reasonably result in</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1871" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1871

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<td class="diff-line-num new_line old" data-linenumber="2138" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1871" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  (T |> hole). We thus must ensure that this cast is dropped, forcing the</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1872" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1872

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<td class="diff-line-num new_line old" data-linenumber="2138" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1872" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  type-checker to add one to the Int instead.</span></span>

</pre>

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2138

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<pre style="margin: 0;">+<span id="LC2138" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  In the type of MkT, we must end with (Int |> TYPE (sym axId)) -> T,</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2139" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2139

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<pre style="margin: 0;">+<span id="LC2139" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  never Int -> (T |> TYPE axId); otherwise, the result type of the</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1873" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2140" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2140

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<pre style="margin: 0;">+<span id="LC2140" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  constructor wouldn't match the datatype. However, type-checking the</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1873" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2141" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2141

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<pre style="margin: 0;">+<span id="LC2141" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  HsType T might reasonably result in (T |> hole). We thus must ensure</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2142" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2142

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<pre style="margin: 0;">+<span id="LC2142" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  that this cast is dropped, forcing the type-checker to add one to</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2143" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2143

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<pre style="margin: 0;">+<span id="LC2143" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  the Int instead.</span></span>

</pre>

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1873

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2144

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<pre style="margin: 0;"> <span id="LC2144" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1874" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1874

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<td class="diff-line-num new_line" data-linenumber="2145" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2145

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<pre style="margin: 0;"> <span id="LC2145" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  Why is it always safe to drop the cast? This result type is type-checked by</span></span>

</pre>

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1875

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<td class="diff-line-num new_line" data-linenumber="2146" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2146

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<pre style="margin: 0;"> <span id="LC2146" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  tcHsOpenType, so its kind definitely looks like TYPE r, for some r. It is</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1881" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2152" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1881,7 +2152,7 @@ Wrinkle: Consider (#17021, typecheck/should_fail/T17021)</td>

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<pre style="margin: 0;"> <span id="LC2152" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that this is possible in the H98 case only for a data family, because</span></span>

</pre>

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1882

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<td class="diff-line-num new_line" data-linenumber="2153" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2153

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<pre style="margin: 0;"> <span id="LC2153" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the H98 syntax doesn't permit a kind signature on the newtype itself.</span></span>

</pre>

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1883

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2154

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<pre style="margin: 0;"> <span id="LC2154" class="line" lang="haskell"></span>

</pre>

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1884

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<pre style="margin: 0;">-<span id="LC1884" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There are also some changes for dea<span class="idiff left right">il</span>ng with families:</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1885" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2155" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2155

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<pre style="margin: 0;">+<span id="LC2155" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There are also some changes for dea<span class="idiff left right">li</span>ng with families:</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1885" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1885

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<td class="diff-line-num new_line" data-linenumber="2156" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2156

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<pre style="margin: 0;"> <span id="LC2156" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1886" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1886

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<td class="diff-line-num new_line" data-linenumber="2157" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2157

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<pre style="margin: 0;"> <span id="LC2157" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1. In tcFamDecl1, we suppress a tcIsLiftedTypeKind check if</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1887" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1887

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<td class="diff-line-num new_line" data-linenumber="2158" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2158

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<pre style="margin: 0;"> <span id="LC2158" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   UnliftedNewtypes is on. This allows us to write things like:</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2290" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2561" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2290,187 +2561,6 @@ Since the LHS of an associated type family default is always just variables,</td>

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2290

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<pre style="margin: 0;"> <span id="LC2561" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">it won't contain any tycons. Accordingly, the patterns used in the substitution</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2291" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2291

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<td class="diff-line-num new_line" data-linenumber="2562" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2562

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<pre style="margin: 0;"> <span id="LC2562" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">won't actually be knot-tied, even though we're in the knot. This is too</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2292" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2292

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<td class="diff-line-num new_line" data-linenumber="2563" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2563

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<pre style="margin: 0;"> <span id="LC2563" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">delicate for my taste, but it works.</span></span>

</pre>

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2293

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2293" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2294" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2294

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<pre style="margin: 0;">-<span id="LC2294" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Datatype return kinds]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2295" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2295

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2295" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2296" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2296

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2296" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There are several poorly lit corners around datatype/newtype return kinds.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2297" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2297

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2297" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This Note explains these. Within this note, always understand "instance"</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2298

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<pre style="margin: 0;">-<span id="LC2298" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">to mean data or newtype instance, and understand "family" to mean data</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2299

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<pre style="margin: 0;">-<span id="LC2299" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">family. No type families or classes here. Some examples:</span></span>

</pre>

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2300

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<pre style="margin: 0;">-<span id="LC2300" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2301" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2301

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<pre style="margin: 0;">-<span id="LC2301" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">data    T a :: <kind> where ...   -- See Point 4</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2302" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2302" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">newtype T a :: <kind> where ...   -- See Point 5</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2303" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2304" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">data family T a :: <kind>          -- See Point 6</span></span>

</pre>

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2305

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2305" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2306" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2306

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2306" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">data    instance T [a] :: <kind> where ...   -- See Point 4</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2307" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2307

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2307" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">newtype instance T [a] :: <kind> where ...   -- See Point 5</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2308" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2308

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2308" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2309" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2309

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2309" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">1. Where this applies: Only GADT syntax for data/newtype/instance declarations</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2310" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2310

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2310" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   can have declared return kinds. This Note does not apply to Haskell98</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2311" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2311

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<pre style="margin: 0;">-<span id="LC2311" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   syntax.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2312" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2312

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<pre style="margin: 0;">-<span id="LC2312" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2313" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2313

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<pre style="margin: 0;">-<span id="LC2313" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. Where these kinds come from: Return kinds are processed through several</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2314" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2314

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<pre style="margin: 0;">-<span id="LC2314" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   different code paths:</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2315" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2315

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<pre style="margin: 0;">-<span id="LC2315" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2316" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2316

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<pre style="margin: 0;">-<span id="LC2316" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Data/newtypes: The return kind is part of the TyCon kind, gotten either</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2317" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2317

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<pre style="margin: 0;">-<span id="LC2317" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     by checkInitialKind (standalone kind signature / CUSK) or</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2318" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2318

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<pre style="margin: 0;">-<span id="LC2318" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     inferInitialKind. It is extracted by bindTyClTyVars in tcTyClDecl1. It is</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2319" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2319

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<pre style="margin: 0;">-<span id="LC2319" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     then passed to tcDataDefn.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2320

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<pre style="margin: 0;">-<span id="LC2320" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2321" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2321

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<pre style="margin: 0;">-<span id="LC2321" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Families: The return kind is either written in a standalone signature</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2322" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2322

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<pre style="margin: 0;">-<span id="LC2322" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     or extracted from a family declaration in getInitialKind.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2323" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2323

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2323" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     If a family declaration is missing a result kind, it is assumed to be</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2324" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2324

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<pre style="margin: 0;">-<span id="LC2324" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     Type. This assumption is in getInitialKind for CUSKs or</span></span>

</pre>

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2325

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2325" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     get_fam_decl_initial_kind for non-signature & non-CUSK cases.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2326" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2326

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<pre style="margin: 0;">-<span id="LC2326" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2327" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2327

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2327" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Instances: The data family already has a known kind. The return kind</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2328" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2328

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2328" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     of an instance is then calculated by applying the data family tycon</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2329" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2329

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2329" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     to the patterns provided, as computed by the typeKind lhs_ty in the</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2330" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2330

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<pre style="margin: 0;">-<span id="LC2330" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     end of tcDataFamInstHeader. In the case of an instance written in GADT</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2331" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2331

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<pre style="margin: 0;">-<span id="LC2331" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     syntax, there are potentially *two* return kinds: the one computed from</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2332" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2332

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<pre style="margin: 0;">-<span id="LC2332" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     applying the data family tycon to the patterns, and the one given by</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2333" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2333

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<pre style="margin: 0;">-<span id="LC2333" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     the user. This second kind is checked by the tc_kind_sig function within</span></span>

</pre>

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2334

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<pre style="margin: 0;">-<span id="LC2334" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     tcDataFamInstHeader.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2335" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2335

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<pre style="margin: 0;">-<span id="LC2335" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2336" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2336

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<pre style="margin: 0;">-<span id="LC2336" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">3. Eta-expansion: Any forall-bound variables and function arguments in a result kind</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2337" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2337

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<pre style="margin: 0;">-<span id="LC2337" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   become parameters to the type. That is, when we say</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2338" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2338

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<pre style="margin: 0;">-<span id="LC2338" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2339" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2339

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<pre style="margin: 0;">-<span id="LC2339" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T a :: Type -> Type where ...</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2340" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2340

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<pre style="margin: 0;">-<span id="LC2340" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2341" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2341

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<pre style="margin: 0;">-<span id="LC2341" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   we really mean for T to have two parameters. The second parameter</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2342" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2342

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<pre style="margin: 0;">-<span id="LC2342" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   is produced by processing the return kind in etaExpandAlgTyCon,</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2343" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2343

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<pre style="margin: 0;">-<span id="LC2343" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   called in tcDataDefn for data/newtypes and in tcDataFamInstDecl</span></span>

</pre>

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2344

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<pre style="margin: 0;">-<span id="LC2344" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   for instances. This is true for data families as well, though their</span></span>

</pre>

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2345

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<pre style="margin: 0;">-<span id="LC2345" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   arity only matters for pretty-printing.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2346" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2346

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<pre style="margin: 0;">-<span id="LC2346" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2347

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<pre style="margin: 0;">-<span id="LC2347" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   See also Note [TyConBinders for the result kind signatures of a data type]</span></span>

</pre>

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2348

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2348" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   in GHC.Tc.Gen.HsType.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2349" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2349

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<pre style="margin: 0;">-<span id="LC2349" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2350" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2350

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<pre style="margin: 0;">-<span id="LC2350" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">4. Datatype return kind restriction: A data/data-instance return kind must end</span></span>

</pre>

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2351

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<pre style="margin: 0;">-<span id="LC2351" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   in a type that, after type-synonym expansion, yields `TYPE LiftedRep`. By</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2352" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2352

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<pre style="margin: 0;">-<span id="LC2352" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   "end in", we mean we strip any foralls and function arguments off before</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2353" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2353

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<pre style="margin: 0;">-<span id="LC2353" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   checking: this remaining part of the type is returned from etaExpandAlgTyCon.</span></span>

</pre>

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2354

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<pre style="margin: 0;">-<span id="LC2354" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2355" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2355

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<pre style="margin: 0;">-<span id="LC2355" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Examples:</span></span>

</pre>

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2356

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<pre style="margin: 0;">-<span id="LC2356" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T1 :: Type                          -- good</span></span>

</pre>

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2357

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<pre style="margin: 0;">-<span id="LC2357" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T2 :: Bool -> Type                  -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2358" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2358

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<pre style="margin: 0;">-<span id="LC2358" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T3 :: Bool -> forall k. Type        -- strange, but still accepted</span></span>

</pre>

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2359

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<pre style="margin: 0;">-<span id="LC2359" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T4 :: forall k. k -> Type           -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2360" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2360

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<pre style="margin: 0;">-<span id="LC2360" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T5 :: Bool                          -- bad</span></span>

</pre>

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2361

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<pre style="margin: 0;">-<span id="LC2361" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T6 :: Type -> Bool                  -- bad</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2362" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2362

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<pre style="margin: 0;">-<span id="LC2362" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2363" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2363

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<pre style="margin: 0;">-<span id="LC2363" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Exactly the same applies to data instance (but not data family)</span></span>

</pre>

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2364

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<pre style="margin: 0;">-<span id="LC2364" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   declarations.  Examples</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2365" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2365

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2365" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data instance D1 :: Type                 -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2366" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2366

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2366" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data instance D2 :: Boool -> Type        -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2367" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2367

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2367" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2368" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2368

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2368" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   We can "look through" type synonyms</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2369" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2369

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2369" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     type Star = Type</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2370" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2370

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2370" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T7 :: Bool -> Star                  -- good (synonym expansion ok)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2371" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2371

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2371" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     type Arrow = (->)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2372" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2372

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2372" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T8 :: Arrow Bool Type               -- good (ditto)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2373" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2373

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2373" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2374" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2374

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2374" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   But we specifically do *not* do type family reduction here.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2375" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2375

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2375" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     type family ARROW where</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2376" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2376

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2376" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       ARROW = (->)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2377

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2377" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T9 :: ARROW Bool Type               -- bad</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2378" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2378

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2378" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2379" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2379

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2379" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     type family F a where</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2380" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2380

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2380" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       F Int  = Bool</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2381" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2381

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2381" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       F Bool = Type</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2382" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2382

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2382" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data T10 :: Bool -> F Bool               -- bad</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2383" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2383

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2383" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2384" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2384

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2384" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   The /principle/ here is that in the TyCon for a data type or data instance,</span></span>

</pre>

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2385

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2385" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   we must be able to lay out all the type-variable binders, one by one, until</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2386" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2386

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2386" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   we reach (TYPE xx).  There is no place for a cast here.  We could add one,</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2387" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2387

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2387" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   but let's not!</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2388" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2388

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2388" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2389" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2389

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2389" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   This check is done in checkDataKindSig. For data declarations, this</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2390" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2390

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2390" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   call is in tcDataDefn; for data instances, this call is in tcDataFamInstDecl.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2391" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2391

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2391" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2392" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2392

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2392" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">4a  Because data instances in GADT syntax can have two return kinds (see</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2393" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2393

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2393" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    point (2) above), we must check both return kinds. The user-written return</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2394" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2394

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2394" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    kind is checked by the call to checkDataKindSig in tcDataFamInstDecl. Examples:</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2395" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2395

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2395" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2396" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2396

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2396" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data family D (a :: Nat) :: k     -- good (see Point 6)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2397" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2397

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2397" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2398" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2398

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2398" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data instance D 1 :: Type         -- good</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2399" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2399

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2399" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data instance D 2 :: F Bool       -- bad</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2400" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2400

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2400" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2401" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2401

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2401" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">5. Newtype return kind restriction: If -XUnliftedNewtypes is on, then</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2402" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2402

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2402" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   a newtype/newtype-instance return kind must end in TYPE xyz, for some</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2403" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2403

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2403" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   xyz (after type synonym expansion). The "xyz" may include type families,</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2404" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2404

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2404" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   but the TYPE part must be visible with expanding type families (only synonyms).</span></span>

</pre>

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2405

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2405" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   This kind is unified with the kind of the representation type (the type</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2406" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2406

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2406" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   of the one argument to the one constructor). See also steps (2) and (3)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2407" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2407

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2407" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   of Note [Implementation of UnliftedNewtypes].</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2408" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2408

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2408" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2409" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2409

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2409" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   If -XUnliftedNewtypes is not on, then newtypes are treated just like datatypes.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2410" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2410

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2410" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2411" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2411

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<pre style="margin: 0;">-<span id="LC2411" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   The checks are done in the same places as for datatypes.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2412" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2412

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<pre style="margin: 0;">-<span id="LC2412" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Examples (assume -XUnliftedNewtypes):</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2413" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2413

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<pre style="margin: 0;">-<span id="LC2413" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2414" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2414

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<pre style="margin: 0;">-<span id="LC2414" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     newtype N1 :: Type                       -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2415" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2415

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<pre style="margin: 0;">-<span id="LC2415" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     newtype N2 :: Bool -> Type               -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2416" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2416

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<pre style="margin: 0;">-<span id="LC2416" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     newtype N3 :: forall r. Bool -> TYPE r   -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2417" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2417

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2417" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2418" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2418

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<pre style="margin: 0;">-<span id="LC2418" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     type family F (t :: Type) :: RuntimeRep</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2419" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2419

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2419" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     newtype N4 :: forall t -> TYPE (F t)     -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2420" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2420

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2420" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2421" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2421

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2421" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     type family STAR where</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2422" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2422

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2422" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       STAR = Type</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2423" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2423

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2423" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     newtype N5 :: Bool -> STAR               -- bad</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2424" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2424

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2424" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2425" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2425" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">6. Family return kind restrictions: The return kind of a data family must</span></span>

</pre>

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2426

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<pre style="margin: 0;">-<span id="LC2426" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   be either TYPE xyz (for some xyz) or a kind variable. The idea is that</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2427" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2427

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<pre style="margin: 0;">-<span id="LC2427" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   instances may specialise the kind variable to fit one of the restrictions</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2428" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2428

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<pre style="margin: 0;">-<span id="LC2428" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   above. This is checked by the call to checkDataKindSig in tcFamDecl1.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2429" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2429

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<pre style="margin: 0;">-<span id="LC2429" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Examples:</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2430" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2430

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<pre style="margin: 0;">-<span id="LC2430" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2431" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2431

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<pre style="margin: 0;">-<span id="LC2431" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data family D1 :: Type              -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2432" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2432

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<pre style="margin: 0;">-<span id="LC2432" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data family D2 :: Bool -> Type      -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2433" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2433

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<pre style="margin: 0;">-<span id="LC2433" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data family D3 k :: k               -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2434" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2434

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<pre style="margin: 0;">-<span id="LC2434" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data family D4 :: forall k -> k     -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2435" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2435

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<pre style="margin: 0;">-<span id="LC2435" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data family D5 :: forall k. k -> k  -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2436" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2436

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<pre style="margin: 0;">-<span id="LC2436" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data family D6 :: forall r. TYPE r  -- good</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2437" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2437

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<pre style="margin: 0;">-<span id="LC2437" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data family D7 :: Bool -> STAR      -- bad (see STAR from point 5)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2438" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2438

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<pre style="margin: 0;">-<span id="LC2438" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2439" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2439

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<pre style="margin: 0;">-<span id="LC2439" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">7. Two return kinds for instances: If an instance has two return kinds,</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2440" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2440

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<pre style="margin: 0;">-<span id="LC2440" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   one from the family declaration and one from the instance declaration</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2441" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2441

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2441" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   (see point (2) above), they are unified. More accurately, we make sure</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2442" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2442

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2442" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   that the kind of the applied data family is a subkind of the user-written</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2443" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2443

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<pre style="margin: 0;">-<span id="LC2443" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   kind. GHC.Tc.Gen.HsType.checkExpectedKind normally does this check for types, but</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2444" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2444

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<pre style="margin: 0;">-<span id="LC2444" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   that's overkill for our needs here. Instead, we just instantiate any</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2445" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2445" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   invisible binders in the (instantiated) kind of the data family</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2446" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2446

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2446" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   (called lhs_kind in tcDataFamInstHeader) with tcInstInvisibleTyBinders</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2447" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2447

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2447" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   and then unify the resulting kind with the kind written by the user.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2448" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2448

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2448" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   This unification naturally produces a coercion, which we can drop, as</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2449" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2449

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2449" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   the kind annotation on the instance is redundant (except perhaps for</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2450" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2450

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2450" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   effects of unification).</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2451" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2451

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2451" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2452" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2452

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2452" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Example:</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2453" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2453

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2453" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2454" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2454

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2454" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data Color = Red | Blue</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2455" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2455

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2455" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      type family Interpret (x :: Color) :: RuntimeRep where</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2456" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2456

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2456" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        Interpret 'Red = 'IntRep</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2457" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2457

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2457" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        Interpret 'Blue = 'WordRep</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2458" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2458

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2458" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data family Foo (x :: Color) :: TYPE (Interpret x)</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2459" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2459

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2459" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      newtype instance Foo 'Red :: TYPE IntRep where</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2460" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2460

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2460" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        FooRedC :: Int# -> Foo 'Red</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2461" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2461

</td>

<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC2461" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2462" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2462

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2462" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Here we get that Foo 'Red :: TYPE (Interpret Red) and we have to</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2463" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2463

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2463" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   unify the kind with TYPE IntRep.</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2464" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2464

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2464" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="2465" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2465" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Example requiring subkinding:</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2466" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2467" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2467" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data family D :: forall k. k</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2468" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2468" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data instance D :: Type               -- forall k. k   <:  Type</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2469" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="2564" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2469" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      data instance D :: Type -> Type       -- forall k. k   <:  Type -> Type</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2470" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        -- NB: these do not overlap</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2471" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2472" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   This all is Wrinkle (3) in Note [Implementation of UnliftedNewtypes].</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2473" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2474" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC2564" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2565" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="2566" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC2566" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2500" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2590" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2500,8 +2590,7 @@ tcFamDecl1 parent (FamilyDecl { fdInfo = fam_info</td>

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<pre style="margin: 0;"> <span id="LC2590" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- When UnliftedNewtypes is enabled, we loosen this restriction</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="2591" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC2591" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- on the return kind. See Note [Implementation of UnliftedNewtypes], wrinkle (1).</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2502" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="2592" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC2592" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- See also Note [Datatype return kinds]</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="2593" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2503" class="line" lang="haskell">  <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">final_res_kind</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitPiTys</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2504" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="2593" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2504" class="line" lang="haskell">  <span class="p">;</span> <span class="n" style="color: #333;">checkDataKindSig</span> <span class="kt" style="color: #458; font-weight: 600;">DataFamilySort</span> <span class="n" style="color: #333;">final_res_kind</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2505" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2593" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC2593" class="line" lang="haskell">  <span class="p">;</span> <span class="n" style="color: #333;">checkDataKindSig</span> <span class="kt" style="color: #458; font-weight: 600;">DataFamilySort</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2594" class="line" lang="haskell">  <span class="p">;</span> <span class="n" style="color: #333;">tc_rep_name</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newTyConRepName</span> <span class="n" style="color: #333;">tc_name</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2506" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2506

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<td class="diff-line-num new_line" data-linenumber="2595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2595

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<pre style="margin: 0;"> <span id="LC2595" class="line" lang="haskell">  <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">inj</span>   <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Injective</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">replicate</span> <span class="p">(</span><span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">binders</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2507" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2507

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<td class="diff-line-num new_line" data-linenumber="2596" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2596

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<pre style="margin: 0;"> <span id="LC2596" class="line" lang="haskell">        <span class="n" style="color: #333;">tycon</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkFamilyTyCon</span> <span class="n" style="color: #333;">tc_name</span> <span class="n" style="color: #333;">binders</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2796" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2885" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2796,7 +2885,7 @@ tcTyFamInstEqn fam_tc mb_clsinfo</td>

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<td class="diff-line-num old_line" data-linenumber="2796" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2796

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<td class="diff-line-num new_line" data-linenumber="2885" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2885

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<pre style="margin: 0;"> <span id="LC2885" class="line" lang="haskell">                                      <span class="n" style="color: #333;">hs_pats</span> <span class="n" style="color: #333;">hs_rhs_ty</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2797" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2797

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<td class="diff-line-num new_line" data-linenumber="2886" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2886

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<pre style="margin: 0;"> <span id="LC2886" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Don't print results they may be knot-tied</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2798" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2798

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<td class="diff-line-num new_line" data-linenumber="2887" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2887

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<pre style="margin: 0;"> <span id="LC2887" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- (tcFamInstEqnGuts zonks to Type)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2799" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2799

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<td class="diff-line-num new_line old" data-linenumber="2888" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2799" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkCoAxBranch</span> <span class="n" style="color: #333;">qtvs</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;"><span class="idiff left">fam_tc</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">pats</span> <span class="n" style="color: #333;">rhs_ty</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2800" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2888" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2888

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<pre style="margin: 0;">+<span id="LC2888" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkCoAxBranch</span> <span class="n" style="color: #333;">qtvs</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">pats</span> <span class="n" style="color: #333;">rhs_ty</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2800" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2800

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<td class="diff-line-num new_line" data-linenumber="2889" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2889

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<pre style="margin: 0;"> <span id="LC2889" class="line" lang="haskell">                              <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span><span class="p">)</span> <span class="n" style="color: #333;">qtvs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2801" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2801

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<td class="diff-line-num new_line" data-linenumber="2890" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2890

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<pre style="margin: 0;"> <span id="LC2890" class="line" lang="haskell">                              <span class="n" style="color: #333;">loc</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2802" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2802

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<td class="diff-line-num new_line" data-linenumber="2891" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2891

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<pre style="margin: 0;"> <span id="LC2891" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3168" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3257" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3168,8 +3257,8 @@ tcConDecl rep_tycon tag_map tmpl_bndrs res_kind res_tmpl new_or_data</td>

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3168

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<td class="diff-line-num new_line" data-linenumber="3257" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3257

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<pre style="margin: 0;"> <span id="LC3257" class="line" lang="haskell">       <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3169" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3169

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<td class="diff-line-num new_line" data-linenumber="3258" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3258

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<pre style="margin: 0;"> <span id="LC3258" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3170" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3170

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<td class="diff-line-num new_line" data-linenumber="3259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3259

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<pre style="margin: 0;"> <span id="LC3259" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecl</span> <span class="n" style="color: #333;">rep_tycon</span> <span class="n" style="color: #333;">tag_map</span> <span class="n" style="color: #333;">tmpl_bndrs</span> <span class="n" style="color: #333;">_res_kind</span> <span class="n" style="color: #333;">res_tmpl</span> <span class="n" style="color: #333;">new_or_data</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3171" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3171

</td>

<td class="diff-line-num new_line old" data-linenumber="3260" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3171" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- NB: don't use res_kind here, as it's ill-scoped. Instead,<span class="idiff left right"> we get</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3172" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3172

</td>

<td class="diff-line-num new_line old" data-linenumber="3260" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3172" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- the res_kind by typechecking the result type.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3173" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3260" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3260

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<pre style="margin: 0;">+<span id="LC3260" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- NB: don't use res_kind here, as it's ill-scoped. Instead,</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3261" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3261" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">we get </span>the res_kind by typechecking the result type.</span></span>

</pre>

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3173

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<td class="diff-line-num new_line" data-linenumber="3262" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3262

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<pre style="margin: 0;"> <span id="LC3262" class="line" lang="haskell">          <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDeclGADT</span> <span class="p">{</span> <span class="n" style="color: #333;">con_g_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">implicit_tkv_nms</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3174" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3174

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<td class="diff-line-num new_line" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3263

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<pre style="margin: 0;"> <span id="LC3263" class="line" lang="haskell">                       <span class="p">,</span> <span class="n" style="color: #333;">con_names</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">names</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3175" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3175

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<td class="diff-line-num new_line" data-linenumber="3264" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3264

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<pre style="margin: 0;"> <span id="LC3264" class="line" lang="haskell">                       <span class="p">,</span> <span class="n" style="color: #333;">con_qvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">explicit_tkv_nms</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3186" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3275" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3186,16 +3275,11 @@ tcConDecl rep_tycon tag_map tmpl_bndrs _res_kind res_tmpl new_or_data</td>

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3275

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<pre style="margin: 0;"> <span id="LC3275" class="line" lang="haskell">              <span class="n" style="color: #333;">bindImplicitTKBndrs_Skol</span> <span class="n" style="color: #333;">implicit_tkv_nms</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3187" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="3276" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3276

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<pre style="margin: 0;"> <span id="LC3276" class="line" lang="haskell">              <span class="n" style="color: #333;">bindExplicitTKBndrs_Skol</span> <span class="n" style="color: #333;">explicit_tkv_nms</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3188" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="3277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC3277" class="line" lang="haskell">              <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">ctxt</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsMbContext</span> <span class="n" style="color: #333;">cxt</span></span>

</pre>

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3189

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<td class="diff-line-num new_line old" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3189" class="line" lang="haskell">                 <span class="p">;</span> <span class="n" style="color: #333;">casted_res_ty</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsOpenType</span> <span class="n" style="color: #333;">hs_res_ty</span></span>

</pre>

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3190

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<td class="diff-line-num new_line old" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3190" class="line" lang="haskell">                 <span class="p">;</span> <span class="n" style="color: #333;">res_ty</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">debugIsOn</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">discardCast</span> <span class="n" style="color: #333;">casted_res_ty</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3191" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3191

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<td class="diff-line-num new_line old" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3191" class="line" lang="haskell">                             <span class="kr" style="font-weight: 600;">else</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">splitCastTy_maybe</span> <span class="n" style="color: #333;">casted_res_ty</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3192" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3192

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<td class="diff-line-num new_line old" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3192" class="line" lang="haskell">                               <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">unlifted_nts</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">xoptM</span> <span class="kt" style="color: #458; font-weight: 600;">LangExt</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">UnliftedNewtypes</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3193" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3193

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<td class="diff-line-num new_line old" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3193" class="line" lang="haskell">                                                  <span class="kt" style="color: #458; font-weight: 600;">MASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">unlifted_nts</span> <span class="p">)</span></span>

</pre>

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3194

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<td class="diff-line-num new_line old" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3194" class="line" lang="haskell">                                                  <span class="kt" style="color: #458; font-weight: 600;">MASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">new_or_data</span> <span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">NewType</span> <span class="p">)</span></span>

</pre>

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3195

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<pre style="margin: 0;">-<span id="LC3195" class="line" lang="haskell">                                                  <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3196

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<pre style="margin: 0;">-<span id="LC3196" class="line" lang="haskell">                               <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">casted_res_ty</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC3278" class="line" lang="haskell">                 <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">res_ty</span><span class="p">,</span> <span class="n" style="color: #333;">res_kind</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInferLHsTypeKind</span> <span class="n" style="color: #333;">hs_res_ty</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3279" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3279

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<pre style="margin: 0;">+<span id="LC3279" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3197

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<td class="diff-line-num new_line" data-linenumber="3280" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3280

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<pre style="margin: 0;"> <span id="LC3280" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- See Note [Datatype return kinds]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3198" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3198

</td>

<td class="diff-line-num new_line old" data-linenumber="3281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3198" class="line" lang="haskell">                 <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">exp_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getArgExpKind</span> <span class="n" style="color: #333;">new_or_data</span> <span class="p">(</span><span class="n" style="color: #333;">typeKind</span> <span class="n" style="color: #333;">res_ty</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3281

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<pre style="margin: 0;">+<span id="LC3281" class="line" lang="haskell">                 <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">exp_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getArgExpKind</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3282" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3282

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<pre style="margin: 0;">+<span id="LC3282" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3199

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<td class="diff-line-num new_line" data-linenumber="3283" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3283

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<pre style="margin: 0;"> <span id="LC3283" class="line" lang="haskell">                 <span class="p">;</span> <span class="n" style="color: #333;">btys</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcConArgs</span> <span class="n" style="color: #333;">exp_kind</span> <span class="n" style="color: #333;">hs_args</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3200" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3200

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<td class="diff-line-num new_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3284

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<pre style="margin: 0;"> <span id="LC3284" class="line" lang="haskell">                 <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">arg_tys</span><span class="p">,</span> <span class="n" style="color: #333;">stricts</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unzip</span> <span class="n" style="color: #333;">btys</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3201" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3201

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<td class="diff-line-num new_line" data-linenumber="3285" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3285

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<pre style="margin: 0;"> <span id="LC3285" class="line" lang="haskell">                 <span class="p">;</span> <span class="n" style="color: #333;">field_lbls</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lookupConstructorFields</span> <span class="n" style="color: #333;">name</span></span>

</pre>

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<br>

</li>

<li id="e63425e031ffe9350ee6b1687e506aaea75d11e1">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#e63425e031ffe9350ee6b1687e506aaea75d11e1"><strong>compiler/GHC/Tc/TyCl/Instance.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="703" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="703" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -703,7 +703,6 @@ tcDataFamInstDecl mb_clsinfo tv_skol_env</td>

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<td class="diff-line-num old_line" data-linenumber="703" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

703

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<td class="diff-line-num new_line" data-linenumber="703" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

703

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<pre style="margin: 0;"> <span id="LC703" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="704" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

704

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<td class="diff-line-num new_line" data-linenumber="704" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

704

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<pre style="margin: 0;"> <span id="LC704" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Check the result kind; it may come from a user-written signature.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="705" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

705

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<td class="diff-line-num new_line" data-linenumber="705" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

705

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<pre style="margin: 0;"> <span id="LC705" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- See Note [Datatype return kinds] in GHC.Tc.TyCl point 4(a)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="706" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

706

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<td class="diff-line-num new_line old" data-linenumber="706" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC706" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">checkDataKindSig</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataInstanceSort</span> <span class="n" style="color: #333;">new_or_data</span><span class="p">)</span> <span class="n" style="color: #333;">final_res_kind</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="707" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

707

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<td class="diff-line-num new_line" data-linenumber="706" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

706

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<pre style="margin: 0;"> <span id="LC706" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">extra_pats</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyVarTy</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">binderVar</span><span class="p">)</span> <span class="n" style="color: #333;">extra_tcbs</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="708" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

708

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<td class="diff-line-num new_line" data-linenumber="707" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

707

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<pre style="margin: 0;"> <span id="LC707" class="line" lang="haskell">             <span class="n" style="color: #333;">all_pats</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pats</span> <span class="p">`</span><span class="n" style="color: #333;">chkAppend</span><span class="p">`</span> <span class="n" style="color: #333;">extra_pats</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="709" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

709

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<td class="diff-line-num new_line" data-linenumber="708" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

708

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<pre style="margin: 0;"> <span id="LC708" class="line" lang="haskell">             <span class="n" style="color: #333;">orig_res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">all_pats</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="712" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="711" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -712,10 +711,12 @@ tcDataFamInstDecl mb_clsinfo tv_skol_env</td>

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712

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<td class="diff-line-num new_line" data-linenumber="711" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

711

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<pre style="margin: 0;"> <span id="LC711" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcDataFamInstDecl"</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

713

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<td class="diff-line-num new_line" data-linenumber="712" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

712

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<pre style="margin: 0;"> <span id="LC712" class="line" lang="haskell">         <span class="n" style="color: #333;">vcat</span> <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Fam tycon:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fam_tc</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="714" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

714

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<td class="diff-line-num new_line" data-linenumber="713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

713

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<pre style="margin: 0;"> <span id="LC713" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Pats:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">pats</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

715

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<td class="diff-line-num new_line old" data-linenumber="714" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC715" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"visibli<span class="idiff left right">i</span>ties:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">tcbVisibilities</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">pats</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="716" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="714" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

714

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<pre style="margin: 0;">+<span id="LC714" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"visiblities:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">tcbVisibilities</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">pats</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="716" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

716

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<td class="diff-line-num new_line" data-linenumber="715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

715

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<pre style="margin: 0;"> <span id="LC715" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"all_pats:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">all_pats</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

717

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<td class="diff-line-num new_line" data-linenumber="716" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

716

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<pre style="margin: 0;"> <span id="LC716" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"ty_binders"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty_binders</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="718" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

718

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<td class="diff-line-num new_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

717

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<pre style="margin: 0;"> <span id="LC717" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"fam_tc_binders:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">tyConBinders</span> <span class="n" style="color: #333;">fam_tc</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="719" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="718" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

718

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<pre style="margin: 0;">+<span id="LC718" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"res_kind:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="719" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="719" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

719

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<pre style="margin: 0;">+<span id="LC719" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"final_res_kind:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">final_res_kind</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="719" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

719

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<td class="diff-line-num new_line" data-linenumber="720" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

720

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<pre style="margin: 0;"> <span id="LC720" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"eta_pats"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">eta_pats</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="720" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

720

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<td class="diff-line-num new_line" data-linenumber="721" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

721

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<pre style="margin: 0;"> <span id="LC721" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"eta_tcbs"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">eta_tcbs</span> <span class="p">]</span></span>

</pre>

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721

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<td class="diff-line-num new_line" data-linenumber="722" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

722

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<pre style="margin: 0;"> <span id="LC722" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="733" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="734" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -733,9 +734,9 @@ tcDataFamInstDecl mb_clsinfo tv_skol_env</td>

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733

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<td class="diff-line-num new_line" data-linenumber="734" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

734

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<pre style="margin: 0;"> <span id="LC734" class="line" lang="haskell">                     <span class="kt" style="color: #458; font-weight: 600;">NewType</span>  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">data_cons</span><span class="p">)</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="734" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

734

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<td class="diff-line-num new_line" data-linenumber="735" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

735

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<pre style="margin: 0;"> <span id="LC735" class="line" lang="haskell">                                 <span class="n" style="color: #333;">mkNewTyConRhs</span> <span class="n" style="color: #333;">rep_tc_name</span> <span class="n" style="color: #333;">rec_rep_tc</span> <span class="p">(</span><span class="n" style="color: #333;">head</span> <span class="n" style="color: #333;">data_cons</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="735" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

735

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<td class="diff-line-num new_line" data-linenumber="736" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

736

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<pre style="margin: 0;"> <span id="LC736" class="line" lang="haskell"></span>

</pre>

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736

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<td class="diff-line-num new_line old" data-linenumber="737" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC736" class="line" lang="haskell">              <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ax<span class="idiff left">iom</span></span><span class="idiff">  </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mkSingleCoAxiom</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Representational</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">axiom_name</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="737" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

737

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<pre style="margin: 0;">-<span id="LC737" class="line" lang="haskell">                    <span class="idiff left">             </span><span class="n" style="color: #333;"><span class="idiff">post_eta_qtvs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">eta_tvs</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">[]</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fam_tc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">eta_pats</span></span></span>

</pre>

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738

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<pre style="margin: 0;">-<span id="LC738" class="line" lang="haskell">                                 <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">mkTyConApp</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rep_tc</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">mkTyVarTys</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">post_eta_qtvs</span></span><span class="p"><span class="idiff right">))</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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737

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<pre style="margin: 0;">+<span id="LC737" class="line" lang="haskell">              <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ax<span class="idiff left">_rhs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mkTyConApp</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rep_tc</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">mkTyVarTys</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">post_eta_qtvs</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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738

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<pre style="margin: 0;">+<span id="LC738" class="line" lang="haskell">                    <span class="n" style="color: #333;"><span class="idiff left">axiom</span></span><span class="idiff">  </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mkSingleCoAxiom</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Representational</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">axiom_name</span></span></span>

</pre>

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739

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<pre style="margin: 0;">+<span id="LC739" class="line" lang="haskell">                                 <span class="n" style="color: #333;"><span class="idiff left">post_eta_qtvs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">eta_tvs</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">[]</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fam_tc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">eta_pats</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">ax_rhs</span></span></span>

</pre>

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739

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740

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<pre style="margin: 0;"> <span id="LC740" class="line" lang="haskell">                    <span class="n" style="color: #333;">parent</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DataFamInstTyCon</span> <span class="n" style="color: #333;">axiom</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">all_pats</span></span>

</pre>

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740

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<td class="diff-line-num new_line" data-linenumber="741" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

741

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<pre style="margin: 0;"> <span id="LC741" class="line" lang="haskell"></span>

</pre>

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741

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<td class="diff-line-num new_line" data-linenumber="742" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

742

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<pre style="margin: 0;"> <span id="LC742" class="line" lang="haskell">                      <span class="c1" style="color: #998; font-style: italic;">-- NB: Use the full ty_binders from the pats. See bullet toward</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="850" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="851" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -850,13 +851,17 @@ tcDataFamInstHeader</td>

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850

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851

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<pre style="margin: 0;"> <span id="LC851" class="line" lang="haskell"><span class="n" style="color: #333;">tcDataFamInstHeader</span> <span class="n" style="color: #333;">mb_clsinfo</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">imp_vars</span> <span class="n" style="color: #333;">mb_bndrs</span> <span class="n" style="color: #333;">fixity</span></span>

</pre>

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852

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<pre style="margin: 0;"> <span id="LC852" class="line" lang="haskell">                    <span class="n" style="color: #333;">hs_ctxt</span> <span class="n" style="color: #333;">hs_pats</span> <span class="n" style="color: #333;">m_ksig</span> <span class="n" style="color: #333;">hs_cons</span> <span class="n" style="color: #333;">new_or_data</span></span>

</pre>

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853

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<pre style="margin: 0;"> <span id="LC853" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcDataFamInstHeader {"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fam_tc</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">hs_pats</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC853" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">imp_tvs</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">exp_tvs</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">stupid_theta</span><span class="p">,</span> <span class="n" style="color: #333;">lhs_ty</span><span class="p">,</span> <span class="n" style="color: #333;">res_kind</span><span class="p">)))</span></span>

</pre>

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854

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<pre style="margin: 0;">+<span id="LC854" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">imp_tvs</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">exp_tvs</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">stupid_theta</span><span class="p">,</span> <span class="n" style="color: #333;">lhs_ty</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left">master_res_kind</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">instance_</span>res_kind</span><span class="p">)))</span></span>

</pre>

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854

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855

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<pre style="margin: 0;"> <span id="LC855" class="line" lang="haskell">            <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushTcLevelM_</span>                                <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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855

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<td class="diff-line-num new_line" data-linenumber="856" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

856

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<pre style="margin: 0;"> <span id="LC856" class="line" lang="haskell">               <span class="n" style="color: #333;">solveEqualities</span>                              <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="856" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

856

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<td class="diff-line-num new_line" data-linenumber="857" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

857

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<pre style="margin: 0;"> <span id="LC857" class="line" lang="haskell">               <span class="n" style="color: #333;">bindImplicitTKBndrs_Q_Skol</span> <span class="n" style="color: #333;">imp_vars</span>          <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="857" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

857

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<td class="diff-line-num new_line" data-linenumber="858" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

858

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<pre style="margin: 0;"> <span id="LC858" class="line" lang="haskell">               <span class="n" style="color: #333;">bindExplicitTKBndrs_Q_Skol</span> <span class="kt" style="color: #458; font-weight: 600;">AnyKind</span> <span class="n" style="color: #333;">exp_bndrs</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="858" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

858

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<td class="diff-line-num new_line" data-linenumber="859" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

859

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<pre style="margin: 0;"> <span id="LC859" class="line" lang="haskell">               <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">stupid_theta</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsContext</span> <span class="n" style="color: #333;">hs_ctxt</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="859" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

859

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<td class="diff-line-num new_line" data-linenumber="860" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

860

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<pre style="margin: 0;"> <span id="LC860" class="line" lang="haskell">                  <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">lhs_ty</span><span class="p">,</span> <span class="n" style="color: #333;">lhs_kind</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcFamTyPats</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">hs_pats</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="860" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="861" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

861

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<pre style="margin: 0;">+<span id="LC861" class="line" lang="haskell">                  <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">lhs_applied_ty</span><span class="p">,</span> <span class="n" style="color: #333;">lhs_applied_kind</span><span class="p">)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="862" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

862

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<pre style="margin: 0;">+<span id="LC862" class="line" lang="haskell">                      <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="n" style="color: #333;">lhs_ty</span> <span class="n" style="color: #333;">lhs_kind</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="860" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="863" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

863

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<pre style="margin: 0;">+<span id="LC863" class="line" lang="haskell">                      <span class="c1" style="color: #998; font-style: italic;">-- See Note [Data family/instance return kinds]</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="864" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

864

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<pre style="margin: 0;">+<span id="LC864" class="line" lang="haskell">                      <span class="c1" style="color: #998; font-style: italic;">-- in GHC.Tc.TyCl point (DF3)</span></span>

</pre>

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860

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<td class="diff-line-num new_line" data-linenumber="865" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

865

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<pre style="margin: 0;"> <span id="LC865" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="861" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

861

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<td class="diff-line-num new_line" data-linenumber="866" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

866

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<pre style="margin: 0;"> <span id="LC866" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- Ensure that the instance is consistent</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="862" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

862

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<td class="diff-line-num new_line" data-linenumber="867" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

867

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<pre style="margin: 0;"> <span id="LC867" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- with its parent class</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="868" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="873" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -868,21 +873,17 @@ tcDataFamInstHeader mb_clsinfo fam_tc imp_vars mb_bndrs fixity</td>

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868

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873

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<pre style="margin: 0;"> <span id="LC873" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- Add constraints from the data constructors</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="869" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

869

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<td class="diff-line-num new_line" data-linenumber="874" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

874

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<pre style="margin: 0;"> <span id="LC874" class="line" lang="haskell">                  <span class="p">;</span> <span class="n" style="color: #333;">kcConDecls</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">res_kind</span> <span class="n" style="color: #333;">hs_cons</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="870" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

870

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<td class="diff-line-num new_line" data-linenumber="875" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

875

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<pre style="margin: 0;"> <span id="LC875" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="871" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

871

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<td class="diff-line-num new_line old" data-linenumber="876" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC871" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- See Note [Datatype return kinds] in GHC.Tc.TyCl, point (7).</span></span>

</pre>

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872

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<td class="diff-line-num new_line old" data-linenumber="876" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC872" class="line" lang="haskell">                  <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">lhs_extra_args</span><span class="p">,</span> <span class="n" style="color: #333;">lhs_applied_kind</span><span class="p">)</span></span>

</pre>

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873

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<pre style="margin: 0;">-<span id="LC873" class="line" lang="haskell">                      <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="p">(</span><span class="n" style="color: #333;">invisibleTyBndrCount</span> <span class="n" style="color: #333;">lhs_kind</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC874" class="line" lang="haskell">                                                  <span class="n" style="color: #333;">lhs_kind</span></span>

</pre>

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875

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<pre style="margin: 0;">-<span id="LC875" class="line" lang="haskell">                  <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">lhs_applied_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lhs_ty</span> <span class="p">`</span><span class="n" style="color: #333;">mkTcAppTys</span><span class="p">`</span> <span class="n" style="color: #333;">lhs_extra_args</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC876" class="line" lang="haskell">                        <span class="n" style="color: #333;">hs_lhs</span>         <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nlHsTyConApp</span> <span class="n" style="color: #333;">fixity</span> <span class="p">(</span><span class="n" style="color: #333;">getName</span> <span class="n" style="color: #333;">fam_tc</span><span class="p">)</span> <span class="n" style="color: #333;">hs_pats</span></span>

</pre>

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876

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<pre style="margin: 0;">+<span id="LC876" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- Check that the result kind of the TyCon applied to its args</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC877" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- is compatible with the explicit signature (or Type, if there</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC878" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- is none)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC879" class="line" lang="haskell">                  <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">hs_lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nlHsTyConApp</span> <span class="n" style="color: #333;">fixity</span> <span class="p">(</span><span class="n" style="color: #333;">getName</span> <span class="n" style="color: #333;">fam_tc</span><span class="p">)</span> <span class="n" style="color: #333;">hs_pats</span></span>

</pre>

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877

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<pre style="margin: 0;"> <span id="LC880" class="line" lang="haskell">                  <span class="p">;</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unifyKind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">unLoc</span> <span class="n" style="color: #333;">hs_lhs</span><span class="p">))</span> <span class="n" style="color: #333;">lhs_applied_kind</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC878" class="line" lang="haskell">                    <span class="c1" style="color: #998; font-style: italic;">-- Check that the result kind of the TyCon applied to its args</span></span>

</pre>

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879

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<pre style="margin: 0;">-<span id="LC879" class="line" lang="haskell">                    <span class="c1" style="color: #998; font-style: italic;">-- is compatible with the explicit signature (or Type, if there</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC880" class="line" lang="haskell">                    <span class="c1" style="color: #998; font-style: italic;">-- is none)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC881" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC882" class="line" lang="haskell">                  <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcDataFamInstHeader"</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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883

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<pre style="margin: 0;"> <span id="LC883" class="line" lang="haskell">                    <span class="n" style="color: #333;">vcat</span> <span class="p">[</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fam_tc</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">m_ksig</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lhs_applied_kind</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">res_kind</span> <span class="p">]</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC884" class="line" lang="haskell">                  <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span> <span class="n" style="color: #333;">stupid_theta</span></span>

</pre>

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885

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<pre style="margin: 0;"> <span id="LC885" class="line" lang="haskell">                           <span class="p">,</span> <span class="n" style="color: #333;">lhs_applied_ty</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC886" class="line" lang="haskell">                           <span class="p">,</span> <span class="n" style="color: #333;">lhs_applied_kind</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC887" class="line" lang="haskell">                           <span class="p">,</span> <span class="n" style="color: #333;">res_kind</span> <span class="p">)</span> <span class="p">}</span></span>

</pre>

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887

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888

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<pre style="margin: 0;"> <span id="LC888" class="line" lang="haskell"></span>

</pre>

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888

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<td class="diff-line-num new_line" data-linenumber="889" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

889

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<pre style="margin: 0;"> <span id="LC889" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- See GHC.Tc.TyCl Note [Generalising in tcFamTyPatsGuts]</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="899" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="900" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -899,13 +900,17 @@ tcDataFamInstHeader mb_clsinfo fam_tc imp_vars mb_bndrs fixity</td>

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899

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900

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<pre style="margin: 0;"> <span id="LC900" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">ze</span><span class="p">,</span> <span class="n" style="color: #333;">qtvs</span><span class="p">)</span>   <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTyBndrs</span> <span class="n" style="color: #333;">qtvs</span></span>

</pre>

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900

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<td class="diff-line-num new_line" data-linenumber="901" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

901

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<pre style="margin: 0;"> <span id="LC901" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">lhs_ty</span>       <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcTypeToTypeX</span> <span class="n" style="color: #333;">ze</span> <span class="n" style="color: #333;">lhs_ty</span></span>

</pre>

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901

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<td class="diff-line-num new_line" data-linenumber="902" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

902

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<pre style="margin: 0;"> <span id="LC902" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">stupid_theta</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcTypesToTypesX</span> <span class="n" style="color: #333;">ze</span> <span class="n" style="color: #333;">stupid_theta</span></span>

</pre>

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902

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<td class="diff-line-num new_line old" data-linenumber="903" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC902" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">res_kind</span>     <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcTypeToTypeX</span> <span class="n" style="color: #333;">ze</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="903" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="903" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

903

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<pre style="margin: 0;">+<span id="LC903" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">master_res_kind</span>   <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcTypeToTypeX</span> <span class="n" style="color: #333;">ze</span> <span class="n" style="color: #333;">master_res_kind</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="904" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

904

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<pre style="margin: 0;">+<span id="LC904" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">instance_res_kind</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcTypeToTypeX</span> <span class="n" style="color: #333;">ze</span> <span class="n" style="color: #333;">instance_res_kind</span></span>

</pre>

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903

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<td class="diff-line-num new_line" data-linenumber="905" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

905

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<pre style="margin: 0;"> <span id="LC905" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="904" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

904

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<td class="diff-line-num new_line" data-linenumber="906" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

906

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<pre style="margin: 0;"> <span id="LC906" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- We check that res_kind is OK with checkDataKindSig in</span></span>

</pre>

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905

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<td class="diff-line-num new_line" data-linenumber="907" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

907

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<pre style="margin: 0;"> <span id="LC907" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- tcDataFamInstDecl, after eta-expansion.  We need to check that</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="906" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

906

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<td class="diff-line-num new_line" data-linenumber="908" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

908

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<pre style="margin: 0;"> <span id="LC908" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- it's ok because res_kind can come from a user-written kind signature.</span></span>

</pre>

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907

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<td class="diff-line-num new_line" data-linenumber="909" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

909

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<pre style="margin: 0;"> <span id="LC909" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- See Note [Datatype return kinds], point (4a)</span></span>

</pre>

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908

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<td class="diff-line-num new_line" data-linenumber="910" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

910

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<pre style="margin: 0;"> <span id="LC910" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="911" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

911

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<pre style="margin: 0;">+<span id="LC911" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">checkDataKindSig</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataInstanceSort</span> <span class="n" style="color: #333;">new_or_data</span><span class="p">)</span> <span class="n" style="color: #333;">master_res_kind</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="912" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

912

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<pre style="margin: 0;">+<span id="LC912" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">checkDataKindSig</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataInstanceSort</span> <span class="n" style="color: #333;">new_or_data</span><span class="p">)</span> <span class="n" style="color: #333;">instance_res_kind</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="913" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

913

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<pre style="margin: 0;">+<span id="LC913" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="909" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

909

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<td class="diff-line-num new_line" data-linenumber="914" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

914

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<pre style="margin: 0;"> <span id="LC914" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Check that type patterns match the class instance head</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="910" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

910

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<td class="diff-line-num new_line" data-linenumber="915" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

915

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<pre style="margin: 0;"> <span id="LC915" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- The call to splitTyConApp_maybe here is just an inlining of</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="911" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

911

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<td class="diff-line-num new_line" data-linenumber="916" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

916

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<pre style="margin: 0;"> <span id="LC916" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- the body of unravelFamInstPats.</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="913" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="918" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -913,7 +918,7 @@ tcDataFamInstHeader mb_clsinfo fam_tc imp_vars mb_bndrs fixity</td>

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913

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<td class="diff-line-num new_line" data-linenumber="918" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

918

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<pre style="margin: 0;"> <span id="LC918" class="line" lang="haskell">           <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">pats</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">pats</span></span>

</pre>

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914

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<td class="diff-line-num new_line" data-linenumber="919" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

919

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<pre style="margin: 0;"> <span id="LC919" class="line" lang="haskell">           <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"tcDataFamInstHeader"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lhs_ty</span><span class="p">)</span></span>

</pre>

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915

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<td class="diff-line-num new_line" data-linenumber="920" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

920

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<pre style="margin: 0;"> <span id="LC920" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="916" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

916

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<td class="diff-line-num new_line old" data-linenumber="921" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC916" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">qtvs</span><span class="p">,</span> <span class="n" style="color: #333;">pats</span><span class="p">,</span> <span class="n" style="color: #333;">res_kind</span><span class="p">,</span> <span class="n" style="color: #333;">stupid_theta</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="917" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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921

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<pre style="margin: 0;">+<span id="LC921" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">qtvs</span><span class="p">,</span> <span class="n" style="color: #333;">pats</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left right">master_</span>res_kind</span><span class="p">,</span> <span class="n" style="color: #333;">stupid_theta</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="917" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

917

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<td class="diff-line-num new_line" data-linenumber="922" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

922

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<pre style="margin: 0;"> <span id="LC922" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="918" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

918

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<td class="diff-line-num new_line" data-linenumber="923" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

923

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<pre style="margin: 0;"> <span id="LC923" class="line" lang="haskell">    <span class="n" style="color: #333;">fam_name</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConName</span> <span class="n" style="color: #333;">fam_tc</span></span>

</pre>

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919

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<td class="diff-line-num new_line" data-linenumber="924" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

924

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<pre style="margin: 0;"> <span id="LC924" class="line" lang="haskell">    <span class="n" style="color: #333;">data_ctxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DataKindCtxt</span> <span class="n" style="color: #333;">fam_name</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="972" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="977" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -972,7 +977,7 @@ however, so this Note aims to describe these subtleties:</td>

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972

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977

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<pre style="margin: 0;"> <span id="LC977" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The representation tycon Drep is parameterised over the free</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="973" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

973

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<td class="diff-line-num new_line" data-linenumber="978" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

978

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<pre style="margin: 0;"> <span id="LC978" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  variables of the pattern, in no particular order. So there is no</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="974" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

974

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<td class="diff-line-num new_line" data-linenumber="979" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

979

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<pre style="margin: 0;"> <span id="LC979" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  guarantee that 'p' and 'q' will come last in Drep's parameters, and</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="975" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

975

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<td class="diff-line-num new_line old" data-linenumber="980" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC975" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  in the right order.  So, if the /patterns/ of the family ins<span class="idiff left right">a</span>tance</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="976" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="980" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

980

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<pre style="margin: 0;">+<span id="LC980" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  in the right order.  So, if the /patterns/ of the family instance</span></span>

</pre>

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976

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<td class="diff-line-num new_line" data-linenumber="981" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

981

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<pre style="margin: 0;"> <span id="LC981" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  are eta-reducible, we re-order Drep's parameters to put the</span></span>

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<pre style="margin: 0;"> <span id="LC982" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  eta-reduced type variables last.</span></span>

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<pre style="margin: 0;"> <span id="LC983" class="line" lang="haskell"></span>

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</li>

<li id="59d42d45d27a766c3ef299d73c226697153b7f6e">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#59d42d45d27a766c3ef299d73c226697153b7f6e"><strong>compiler/GHC/Tc/Utils/Instantiate.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -16,7 +16,7 @@ module GHC.Tc.Utils.Instantiate (</td>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell">       <span class="nf" style="color: #900; font-weight: 600;">instCall</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">instDFunType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">instStupidTheta</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">instTyVarsWith</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell">       <span class="nf" style="color: #900; font-weight: 600;">newWanted</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">newWanteds</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC19" class="line" lang="haskell">       <span class="nf" style="color: #900; font-weight: 600;">tcInstInvisibleTyBinders</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcInstInvisibleTyBinder</span><span class="p">,</span></span>

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell">       <span class="nf" style="color: #900; font-weight: 600;">tcInstInvisibleTyBinders<span class="idiff left">N</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">tcInstInvisibleTyBinders</span></span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcInstInvisibleTyBinder</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell">       <span class="nf" style="color: #900; font-weight: 600;">newOverloadedLit</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkOverLit</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="365" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="365" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -365,13 +365,19 @@ instStupidTheta orig theta</td>

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<pre style="margin: 0;"> <span id="LC365" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>

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<pre style="margin: 0;"> <span id="LC366" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">********************************************************************* -}</span></span>

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<pre style="margin: 0;"> <span id="LC367" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC368" class="line" lang="haskell"><span class="cd">-- | Instantiates up to n invisible binders</span></span>

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<pre style="margin: 0;">-<span id="LC369" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Returns the instantiating types, and body kind</span></span>

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<pre style="margin: 0;">-<span id="LC370" class="line" lang="haskell"><span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">TcType</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC368" class="line" lang="haskell"><span class="cd">-- | Given ty::forall k1 k2. k, instantiate all the invisible forall-binders</span></span>

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<pre style="margin: 0;">+<span id="LC369" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   returning ty @kk1 @kk2 :: k[kk1/k1, kk2/k1]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC370" class="line" lang="haskell"><span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcType</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC371" class="line" lang="haskell"><span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="372" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

372

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<pre style="margin: 0;">+<span id="LC372" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">extra_args</span><span class="p">,</span> <span class="n" style="color: #333;">kind'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInstInvisibleTyBindersN</span> <span class="n" style="color: #333;">n_invis</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC373" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkAppTys</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">extra_args</span><span class="p">,</span> <span class="n" style="color: #333;">kind'</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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374

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<pre style="margin: 0;">+<span id="LC374" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC375" class="line" lang="haskell">    <span class="n" style="color: #333;">n_invis</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">invisibleTyBndrCount</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

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371

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376

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<pre style="margin: 0;"> <span id="LC376" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC372" class="line" lang="haskell"><span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC377" class="line" lang="haskell"><span class="n" style="color: #333;">tcInstInvisibleTyBindersN</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">TcType</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="378" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC378" class="line" lang="haskell"><span class="n" style="color: #333;">tcInstInvisibleTyBindersN</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">kind</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="379" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

379

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<pre style="margin: 0;"> <span id="LC379" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">kind</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="380" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC374" class="line" lang="haskell"><span class="n" style="color: #333;">tcInstInvisibleTyBinders</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="380" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC380" class="line" lang="haskell"><span class="n" style="color: #333;">tcInstInvisibleTyBinders<span class="idiff left right">N</span></span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

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375

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<td class="diff-line-num new_line" data-linenumber="381" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

381

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<pre style="margin: 0;"> <span id="LC381" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">empty_subst</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

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376

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<td class="diff-line-num new_line" data-linenumber="382" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

382

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<pre style="margin: 0;"> <span id="LC382" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="383" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC383" class="line" lang="haskell">    <span class="n" style="color: #333;">empty_subst</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkEmptyTCvSubst</span> <span class="p">(</span><span class="n" style="color: #333;">mkInScopeSet</span> <span class="p">(</span><span class="n" style="color: #333;">tyCoVarsOfType</span> <span class="n" style="color: #333;">ty</span><span class="p">))</span></span>

</pre>

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<br>

</li>

<li id="06c32582e3db8cd4d22527045923c480aab8dfbb">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#06c32582e3db8cd4d22527045923c480aab8dfbb"><strong>testsuite/tests/polykinds/T18300.hs</strong></a>

<hr>

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE GADTs, PolyKinds, DataKinds, TypeFamilies #-}</span></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">Foo</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Kind</span></span>

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">F</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RuntimeRep</span></span>

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">F</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">'LiftedRep</span></span>

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">T</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">F</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">T</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkT</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">T</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ASSERT error in HEAD</span></span></pre>

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</li>

<li id="1b7bd6a45b74d0d2c4315fb30e7b443cb75d769c">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#1b7bd6a45b74d0d2c4315fb30e7b443cb75d769c"><strong>testsuite/tests/polykinds/T18300.stderr</strong></a>

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1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T18300.hs:13:1: error:</span>

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3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Data instance has non-* return kind ‘TYPE (F Int)’</span>

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4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">    • In the data instance declaration for ‘T’</span></pre>

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<br>

</li>

<li id="37bb83d0a916288b2296ba25cdbbef228eed6484">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#37bb83d0a916288b2296ba25cdbbef228eed6484"><strong>testsuite/tests/polykinds/all.T</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="219" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="219" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -219,3 +219,4 @@ test('T16902', normal, compile_fail, [''])</td>

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219

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219

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<pre style="margin: 0;"> <span id="LC219" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">CuskFam</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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220

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<td class="diff-line-num new_line" data-linenumber="220" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

220

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<pre style="margin: 0;"> <span id="LC220" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17841</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="221" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

221

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<td class="diff-line-num new_line" data-linenumber="221" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

221

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<pre style="margin: 0;"> <span id="LC221" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17963</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="222" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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222

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<pre style="margin: 0;">+<span id="LC222" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18300</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span></pre>

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</li>

<li id="34fe7bf0e6fbf60effb28393399ba68666593909">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ce29bdc99994aed33fab2ef2ee3d695cb8ff133#34fe7bf0e6fbf60effb28393399ba68666593909"><strong>testsuite/tests/typecheck/should_compile/all.T</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="685" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="685" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -685,7 +685,7 @@ test('UnliftedNewtypesUnifySig', normal, compile, [''])</td>

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685

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685

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<pre style="margin: 0;"> <span id="LC685" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesForall</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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686

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<td class="diff-line-num new_line" data-linenumber="686" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

686

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<pre style="margin: 0;"> <span id="LC686" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnlifNewUnify</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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687

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<td class="diff-line-num new_line" data-linenumber="687" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

687

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<pre style="margin: 0;"> <span id="LC687" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesLPFamily</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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688

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<td class="diff-line-num new_line old" data-linenumber="688" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC688" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesDifficultUnification</span><span class="p">',</span> <span class="nv" style="color: #008080;"><span class="idiff left">when</span></span><span class="p"><span class="idiff">(</span></span><span class="nv" style="color: #008080;"><span class="idiff">compiler_debugged</span></span><span class="p"><span class="idiff">(),</span></span><span class="idiff"> </span><span class="nv" style="color: #008080;"><span class="idiff">expect_broken</span></span><span class="p"><span class="idiff">(</span></span><span class="mi" style="color: #099;"><span class="idiff">18300</span></span><span class="p"><span class="idiff right">))</span>,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="689" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="688" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

688

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<pre style="margin: 0;">+<span id="LC688" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesDifficultUnification</span><span class="p">',</span> <span class="nv" style="color: #008080;"><span class="idiff left right">normal</span></span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="689" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

689

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<td class="diff-line-num new_line" data-linenumber="689" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

689

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<pre style="margin: 0;"> <span id="LC689" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16832</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">ghci_script</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">T16832.script</span><span class="p">'])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="690" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

690

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<td class="diff-line-num new_line" data-linenumber="690" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

690

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<pre style="margin: 0;"> <span id="LC690" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16995</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="691" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

691

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<td class="diff-line-num new_line" data-linenumber="691" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

691

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<pre style="margin: 0;"> <span id="LC691" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17007</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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