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<h3>

 Marge Bot pushed to branch master

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/7a93435b991513b71174c807b4e99ad90f4e5058">7a93435b</a></strong>

<div>

<span>by Ryan Scott</span>

<i>at 2020-12-18T05:50:33-05:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Use HsOuterExplicit in instance sigs in deriving-generated code

Issue #18914 revealed that `GeneralizedNewtypeDeriving` would generate code

that mentions unbound type variables, which is dangerously fragile. The

problem (and fix) is described in the new `Wrinkle: Use HsOuterExplicit`

in `Note [GND and QuantifiedConstraints]`. The gist of it: make sure to

put the top-level `forall`s in `deriving`-generated instance signatures in an

`HsOuterExplicit` to ensure that they scope over the bodies of methods

correctly. A side effect of this process is that it will expand any type

synonyms in the instance signature, which will surface any `forall`s that

are hidden underneath type synonyms (such as in the test case for #18914).

While I was in town, I also performed some maintenance on `NewHsTypeX`, which

powers `GeneralizedNewtypeDeriving`:

* I renamed `NewHsTypeX` to `HsCoreTy`, which more accurately describes its

  intended purpose (#15706). I also made `HsCoreTy` a type synonym instead of

  a newtype, as making it a distinct data type wasn't buying us much.

* To make sure that mistakes similar to #18914 do not occur later, I added an

  additional validity check when renaming `HsCoreTy`s that complains if an

  `HsCoreTy`s contains an out-of-scope type variable. See the new

  `Note [Renaming HsCoreTys]` in `GHC.Rename.HsType` for the details.

Fixes #15706. Fixes #18914. Bumps the `haddock` submodule.

</pre>

</li>

</ul>

<h4>10 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#018be522bc4813b147a1525e4f96a7a493207d96">

compiler/GHC/Hs/Type.hs

</a>

</li>

<li class="file-stats">

<a href="#892acbb198a9095c917740d3c1297b56df4e3b7e">

compiler/GHC/Rename/HsType.hs

</a>

</li>

<li class="file-stats">

<a href="#3aa56839e36b2219f9ad54f5646ef3005da9c672">

compiler/GHC/Tc/Deriv/Generate.hs

</a>

</li>

<li class="file-stats">

<a href="#9355bef855426caf5f526925edf351b20f9a86c4">

compiler/GHC/Tc/Gen/HsType.hs

</a>

</li>

<li class="file-stats">

<a href="#eade747fa0a15693c67617629e286714fce958e4">

compiler/GHC/Tc/Gen/Sig.hs

</a>

</li>

<li class="file-stats">

<a href="#e63425e031ffe9350ee6b1687e506aaea75d11e1">

compiler/GHC/Tc/TyCl/Instance.hs

</a>

</li>

<li class="file-stats">

<a href="#d67e8c37b660b851784cafe36eb0327428012ff0">

testsuite/tests/deriving/should_compile/T14578.stderr

</a>

</li>

<li class="file-stats">

<a href="#6c3a9e0a20f8145c45cc4c63b44430dd29ba7555">

<span class="new-file">

+

testsuite/tests/deriving/should_compile/T18914.hs

</span>

</a>

</li>

<li class="file-stats">

<a href="#e7bc29da08da2be1b3bd264c751322dc3e8c1905">

testsuite/tests/deriving/should_compile/all.T

</a>

</li>

<li class="file-stats">

<a href="#46ddb8dda2edd2df4717a3285e83997fc812a347">

utils/haddock

</a>

</li>

</ul>

<h4>Changes:</h4>

<li id="018be522bc4813b147a1525e4f96a7a493207d96">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a93435b991513b71174c807b4e99ad90f4e5058#018be522bc4813b147a1525e4f96a7a493207d96"><strong>compiler/GHC/Hs/Type.hs</strong></a>

<hr>

<table class="code white" style="font-family: monospace; font-size: 90%;" bgcolor="#fff" width="100%" cellpadding="0" cellspacing="0">

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

<td class="diff-line-num unfold js-unfold old_line" data-linenumber="24" style="width: 35px; color: rgba(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="24" style="width: 35px; color: rgba(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">@@ -24,7 +24,7 @@ module GHC.Hs.Type (</td>

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<td class="diff-line-num old_line" data-linenumber="24" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

24

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<td class="diff-line-num new_line" data-linenumber="24" style="width: 35px; color: rgba(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="LC24" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">HsArrow</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">arrowToHsType</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="25" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

25

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<td class="diff-line-num new_line" data-linenumber="25" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

25

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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">hsLinear</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">hsUnrestricted</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isUnrestricted</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="26" style="width: 35px; color: rgba(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="LC26" class="line" lang="haskell"></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="27" style="width: 35px; color: rgba(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="27" style="width: 35px; color: rgba(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="LC27" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">HsType</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NewHsTypeX</span></span><span class="p"><span class="idiff">(</span></span><span class="o" style="font-weight: 600;"><span class="idiff">..</span></span><span class="p"><span class="idiff right">)</span>,</span> <span class="kt" style="color: #458; font-weight: 600;">LHsType</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">HsKind</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">LHsKind</span><span class="p">,</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="28" style="width: 35px; color: rgba(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="27" style="width: 35px; color: rgba(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="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">HsType</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">HsCoreTy</span></span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">LHsType</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">HsKind</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">LHsKind</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="28" style="width: 35px; color: rgba(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="28" style="width: 35px; color: rgba(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="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">HsForAllTelescope</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">HsTyVarBndr</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">LHsTyVarBndr</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="29" style="width: 35px; color: rgba(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="29" style="width: 35px; color: rgba(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="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">LHsQTyVars</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</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="30" style="width: 35px; color: rgba(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="30" style="width: 35px; color: rgba(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="LC30" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">HsOuterTyVarBndrs</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">HsOuterFamEqnTyVarBndrs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">HsOuterSigTyVarBndrs</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1040" style="width: 35px; color: rgba(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="1040" style="width: 35px; color: rgba(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">@@ -1040,12 +1040,6 @@ data HsType pass</td>

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<td class="diff-line-num old_line" data-linenumber="1040" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1040

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1040

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<pre style="margin: 0;"> <span id="LC1040" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1041" style="width: 35px; color: rgba(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="LC1041" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- For details on above see note [Api annotations] in GHC.Parser.Annotation</span></span>

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<pre style="margin: 0;"> <span id="LC1042" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1043" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- | HsCoreTy (XCoreTy pass) Type -- An escape hatch for tunnelling a *closed*</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1044" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1044

</td>

<td class="diff-line-num new_line old" data-linenumber="1043" style="width: 35px; color: rgba(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="LC1044" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">--                                -- Core Type through HsSyn.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1045" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1045

</td>

<td class="diff-line-num new_line old" data-linenumber="1043" style="width: 35px; color: rgba(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="LC1045" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">--     -- ^ - 'GHC.Parser.Annotation.AnnKeywordId' : None</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1046" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1046

</td>

<td class="diff-line-num new_line old" data-linenumber="1043" style="width: 35px; color: rgba(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="LC1046" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1047" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1047

</td>

<td class="diff-line-num new_line old" data-linenumber="1043" style="width: 35px; color: rgba(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="LC1047" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- For details on above see note [Api annotations] in GHC.Parser.Annotation</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1048" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1048

</td>

<td class="diff-line-num new_line old" data-linenumber="1043" style="width: 35px; color: rgba(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="LC1048" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1049" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1049

</td>

<td class="diff-line-num new_line" data-linenumber="1043" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1043

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<pre style="margin: 0;"> <span id="LC1043" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">HsExplicitListTy</span>       <span class="c1" style="color: #998; font-style: italic;">-- A promoted explicit list</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1050" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1050

</td>

<td class="diff-line-num new_line" data-linenumber="1044" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1044

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<pre style="margin: 0;"> <span id="LC1044" class="line" lang="haskell">        <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XExplicitListTy</span> <span class="n" style="color: #333;">pass</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1051" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1051

</td>

<td class="diff-line-num new_line" data-linenumber="1045" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1045

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<pre style="margin: 0;"> <span id="LC1045" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">PromotionFlag</span>      <span class="c1" style="color: #998; font-style: italic;">-- whether explicitly promoted, for pretty printer</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1078" style="width: 35px; color: rgba(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="1072" style="width: 35px; color: rgba(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">@@ -1078,16 +1072,13 @@ data HsType pass</td>

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<td class="diff-line-num old_line" data-linenumber="1078" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1078

</td>

<td class="diff-line-num new_line" data-linenumber="1072" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1072

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<pre style="margin: 0;"> <span id="LC1072" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">XHsType</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1079" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1079

</td>

<td class="diff-line-num new_line" data-linenumber="1073" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1073

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<pre style="margin: 0;"> <span id="LC1073" class="line" lang="haskell">      <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XXType</span> <span class="n" style="color: #333;">pass</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1080" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1080

</td>

<td class="diff-line-num new_line" data-linenumber="1074" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1074

</td>

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

<pre style="margin: 0;"> <span id="LC1074" 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="1081" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1081

</td>

<td class="diff-line-num new_line old" data-linenumber="1075" style="width: 35px; color: rgba(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="LC1081" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">NewHsTypeX</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1082

</td>

<td class="diff-line-num new_line old" data-linenumber="1075" style="width: 35px; color: rgba(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="LC1082" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NHsCoreTy</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="c1" style="color: #998; font-style: italic;">-- An escape hatch for tunnelling a *closed*</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1083" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1083

</td>

<td class="diff-line-num new_line old" data-linenumber="1075" style="width: 35px; color: rgba(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="LC1083" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- Core Type through HsSyn.</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1084" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1084

</td>

<td class="diff-line-num new_line old" data-linenumber="1075" style="width: 35px; color: rgba(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="LC1084" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- See also Note [Typechecking NHsCoreTys] in</span></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="1085" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1085

</td>

<td class="diff-line-num new_line old" data-linenumber="1075" style="width: 35px; color: rgba(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="LC1085" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- GHC.Tc.Gen.HsType.</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1086" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1086

</td>

<td class="diff-line-num new_line old" data-linenumber="1075" style="width: 35px; color: rgba(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="LC1086" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;">Data</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1087" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1087

</td>

<td class="diff-line-num new_line old" data-linenumber="1075" style="width: 35px; color: rgba(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="LC1087" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- ^ - 'GHC.Parser.Annotation.AnnKeywordId' : None</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1088" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1088

</td>

<td class="diff-line-num new_line old" data-linenumber="1075" style="width: 35px; color: rgba(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="LC1088" 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="1089" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1089

</td>

<td class="diff-line-num new_line old" data-linenumber="1075" style="width: 35px; color: rgba(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="LC1089" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">NewHsTypeX</span> <span class="kr" style="font-weight: 600;">where</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="1090" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1090

</td>

<td class="diff-line-num new_line old" data-linenumber="1075" style="width: 35px; color: rgba(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="LC1090" 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;">NHsCoreTy</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1091" style="width: 35px; color: rgba(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="1075" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1075

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<pre style="margin: 0;">+<span id="LC1075" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- An escape hatch for tunnelling a Core 'Type' through 'HsType'.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1091" style="width: 35px; color: rgba(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="1076" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1076

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<pre style="margin: 0;">+<span id="LC1076" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- For more details on how this works, see:</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1091" style="width: 35px; color: rgba(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="1077" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1077

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<pre style="margin: 0;">+<span id="LC1077" 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 new old_line" data-linenumber="1091" style="width: 35px; color: rgba(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="1078" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1078

</td>

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<pre style="margin: 0;">+<span id="LC1078" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- * @Note [Renaming HsCoreTys]@ in "GHC.Rename.HsType"</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1091" style="width: 35px; color: rgba(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="1079" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1079

</td>

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<pre style="margin: 0;">+<span id="LC1079" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</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="1091" style="width: 35px; color: rgba(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="1080" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1080

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<pre style="margin: 0;">+<span id="LC1080" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- * @Note [Typechecking HsCoreTys]@ in "GHC.Tc.Gen.HsType"</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="1091" style="width: 35px; color: rgba(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="1081" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1081

</td>

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<pre style="margin: 0;">+<span id="LC1081" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">HsCoreTy</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Type</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="1091" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1091

</td>

<td class="diff-line-num new_line" data-linenumber="1082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1082

</td>

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

<pre style="margin: 0;"> <span id="LC1082" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1092" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1092

</td>

<td class="diff-line-num new_line" data-linenumber="1083" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1083

</td>

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<pre style="margin: 0;"> <span id="LC1083" 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;">XForAllTy</span>        <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1093" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1093

</td>

<td class="diff-line-num new_line" data-linenumber="1084" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1084

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<pre style="margin: 0;"> <span id="LC1084" 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;">XQualTy</span>          <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1125" style="width: 35px; color: rgba(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="1116" style="width: 35px; color: rgba(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">@@ -1125,7 +1116,7 @@ type instance XTyLit           (GhcPass _) = NoExtField</td>

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<td class="diff-line-num old_line" data-linenumber="1125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1125

</td>

<td class="diff-line-num new_line" data-linenumber="1116" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1116

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<pre style="margin: 0;"> <span id="LC1116" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1126" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1126

</td>

<td class="diff-line-num new_line" data-linenumber="1117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1117

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<pre style="margin: 0;"> <span id="LC1117" 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;">XWildCardTy</span>      <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1127" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1127

</td>

<td class="diff-line-num new_line" data-linenumber="1118" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1118

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<pre style="margin: 0;"> <span id="LC1118" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1128" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1128

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<td class="diff-line-num new_line old" data-linenumber="1119" style="width: 35px; color: rgba(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="LC1128" 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;">XXType</span>         <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">NewHsTypeX</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1129" style="width: 35px; color: rgba(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="1119" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1119

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<pre style="margin: 0;">+<span id="LC1119" 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;">XXType</span>         <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">HsCoreTy</span></span></span>

</pre>

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1129

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<td class="diff-line-num new_line" data-linenumber="1120" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1120

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<pre style="margin: 0;"> <span id="LC1120" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1130" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1130

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1121

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<pre style="margin: 0;"> <span id="LC1121" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1131" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1131

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<td class="diff-line-num new_line" data-linenumber="1122" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1122

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<pre style="margin: 0;"> <span id="LC1122" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note [Literal source text] in GHC.Types.Basic for SourceText fields in</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2256" style="width: 35px; color: rgba(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="2247" style="width: 35px; color: rgba(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">@@ -2256,7 +2247,7 @@ hsTypeNeedsParens p = go_hs_ty</td>

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<td class="diff-line-num old_line" data-linenumber="2256" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2256

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<td class="diff-line-num new_line" data-linenumber="2247" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2247

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<pre style="margin: 0;"> <span id="LC2247" class="line" lang="haskell">    <span class="n" style="color: #333;">go_hs_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsOpTy</span><span class="p">{})</span>               <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">>=</span> <span class="n" style="color: #333;">opPrec</span></span>

</pre>

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2257

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<td class="diff-line-num new_line" data-linenumber="2248" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2248

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<pre style="margin: 0;"> <span id="LC2248" class="line" lang="haskell">    <span class="n" style="color: #333;">go_hs_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsParTy</span><span class="p">{})</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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2258

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<td class="diff-line-num new_line" data-linenumber="2249" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2249

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<pre style="margin: 0;"> <span id="LC2249" class="line" lang="haskell">    <span class="n" style="color: #333;">go_hs_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsDocTy</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">t</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="n" style="color: #333;">go_hs_ty</span> <span class="n" style="color: #333;">t</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2259

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<td class="diff-line-num new_line old" data-linenumber="2250" style="width: 35px; color: rgba(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="LC2259" class="line" lang="haskell">    <span class="n" style="color: #333;">go_hs_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">NHsCoreTy</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty</span></span><span class="p"><span class="idiff right">))</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_core_ty</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2260" style="width: 35px; color: rgba(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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2250

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<pre style="margin: 0;">+<span id="LC2250" class="line" lang="haskell">    <span class="n" style="color: #333;">go_hs_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="n" style="color: #333;"><span class="idiff left">ty</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff right">            </span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go_core_ty</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

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2260

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<td class="diff-line-num new_line" data-linenumber="2251" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2251

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<pre style="margin: 0;"> <span id="LC2251" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2261" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2261

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<td class="diff-line-num new_line" data-linenumber="2252" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2252

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<pre style="margin: 0;"> <span id="LC2252" class="line" lang="haskell">    <span class="n" style="color: #333;">go_core_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyVarTy</span><span class="p">{})</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="2262" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2262

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<td class="diff-line-num new_line" data-linenumber="2253" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2253

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<pre style="margin: 0;"> <span id="LC2253" class="line" lang="haskell">    <span class="n" style="color: #333;">go_core_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">AppTy</span><span class="p">{})</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">>=</span> <span class="n" style="color: #333;">appPrec</span></span>

</pre>

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<br>

</li>

<li id="892acbb198a9095c917740d3c1297b56df4e3b7e">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a93435b991513b71174c807b4e99ad90f4e5058#892acbb198a9095c917740d3c1297b56df4e3b7e"><strong>compiler/GHC/Rename/HsType.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="41" style="width: 35px; color: rgba(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="41" style="width: 35px; color: rgba(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">@@ -41,6 +41,7 @@ import GHC.Prelude</td>

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41

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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC42" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="err" style="color: #a61717; background-color: #e3d2d2;">{-#</span> <span class="nn" style="color: #555;">SOURCE</span> <span class="o" style="font-weight: 600;">#-</span><span class="p">}</span> <span class="kt" style="color: #458; font-weight: 600;">GHC</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Rename</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Splice</span><span class="p">(</span> <span class="n" style="color: #333;">rnSpliceType</span> <span class="p">)</span></span>

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43

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<td class="diff-line-num new_line" data-linenumber="43" style="width: 35px; color: rgba(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="LC43" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC44" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCo.FVs</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">tyCoVarsOfTypeList</span> <span class="p">)</span></span>

</pre>

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44

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<td class="diff-line-num new_line" data-linenumber="45" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

45

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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Session</span></span>

</pre>

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45

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46

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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Hs</span></span>

</pre>

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46

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<td class="diff-line-num new_line" data-linenumber="47" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

47

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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Rename.Env</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="50" style="width: 35px; color: rgba(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="51" style="width: 35px; color: rgba(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">@@ -50,6 +51,7 @@ import GHC.Rename.Utils  ( HsDocContext(..), inHsDocContext, withHsDocContext</td>

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50

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51

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

</pre>

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51

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52

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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Rename.Fixity</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">lookupFieldFixityRn</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lookupFixityRn</span></span>

</pre>

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52

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<td class="diff-line-num new_line" data-linenumber="53" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

53

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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell">                         <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lookupTyFixityRn</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="54" style="width: 35px; color: rgba(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="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Rename.Unbound</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">notInScopeErr</span> <span class="p">)</span></span>

</pre>

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53

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55

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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Monad</span></span>

</pre>

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54

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56

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<pre style="margin: 0;"> <span id="LC56" 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>

</pre>

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55

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57

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<pre style="margin: 0;"> <span id="LC57" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Names</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold 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">...</td>

<td class="diff-line-num unfold js-unfold 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">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -717,10 +719,20 @@ rnHsTyKi env (HsDocTy _ ty haddock_doc)</td>

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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="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="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;">fvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rnLHsTyKi</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">ty</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="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;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsDocTy</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">ty'</span> <span class="n" style="color: #333;">haddock_doc</span><span class="p">,</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="720" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

720

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<pre style="margin: 0;">-<span id="LC720" class="line" lang="haskell"><span class="n" style="color: #333;">rnHsTyKi</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NHsCoreTy</span> <span class="n" style="color: #333;">ty</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old old_line" 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">

721

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<pre style="margin: 0;">-<span id="LC721" 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;">XHsType</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NHsCoreTy</span> <span class="n" style="color: #333;">ty</span><span class="p">),</span> <span class="n" style="color: #333;">emptyFVs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="722" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

722

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<pre style="margin: 0;">-<span id="LC722" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- The emptyFVs probably isn't quite right</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="723" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

723

</td>

<td class="diff-line-num new_line old" data-linenumber="722" style="width: 35px; color: rgba(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="LC723" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- but I don't think it matters</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="724" style="width: 35px; color: rgba(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="722" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

722

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<pre style="margin: 0;">+<span id="LC722" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Renaming HsCoreTys]</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="724" style="width: 35px; color: rgba(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="723" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

723

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<pre style="margin: 0;">+<span id="LC723" class="line" lang="haskell"><span class="n" style="color: #333;">rnHsTyKi</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="724" style="width: 35px; color: rgba(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="724" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

724

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<pre style="margin: 0;">+<span id="LC724" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">mapM_</span> <span class="p">(</span><span class="n" style="color: #333;">check_in_scope</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">nameRdrName</span><span class="p">)</span> <span class="n" style="color: #333;">fvs_list</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="724" style="width: 35px; color: rgba(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="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">

725

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<pre style="margin: 0;">+<span id="LC725" class="line" lang="haskell">       <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="724" style="width: 35px; color: rgba(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="726" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

726

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<pre style="margin: 0;">+<span id="LC726" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</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="724" style="width: 35px; color: rgba(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="727" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

727

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<pre style="margin: 0;">+<span id="LC727" class="line" lang="haskell">    <span class="n" style="color: #333;">fvs_list</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">getName</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">tyCoVarsOfTypeList</span> <span class="n" style="color: #333;">ty</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="724" style="width: 35px; color: rgba(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="728" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

728

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<pre style="margin: 0;">+<span id="LC728" class="line" lang="haskell">    <span class="n" style="color: #333;">fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkFVs</span> <span class="n" style="color: #333;">fvs_list</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="724" style="width: 35px; color: rgba(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="729" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

729

</td>

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

<pre style="margin: 0;">+<span id="LC729" 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="724" style="width: 35px; color: rgba(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="730" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

730

</td>

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<pre style="margin: 0;">+<span id="LC730" class="line" lang="haskell">    <span class="n" style="color: #333;">check_in_scope</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RdrName</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RnM</span> <span class="nb" style="color: #0086b3;">()</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="724" style="width: 35px; color: rgba(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="731" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

731

</td>

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

<pre style="margin: 0;">+<span id="LC731" class="line" lang="haskell">    <span class="n" style="color: #333;">check_in_scope</span> <span class="n" style="color: #333;">rdr_name</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</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="724" style="width: 35px; color: rgba(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="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

732

</td>

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<pre style="margin: 0;">+<span id="LC732" class="line" lang="haskell">      <span class="n" style="color: #333;">mb_name</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lookupLocalOccRn_maybe</span> <span class="n" style="color: #333;">rdr_name</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="724" style="width: 35px; color: rgba(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="733" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

733

</td>

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

<pre style="margin: 0;">+<span id="LC733" class="line" lang="haskell">      <span class="n" style="color: #333;">when</span> <span class="p">(</span><span class="n" style="color: #333;">isNothing</span> <span class="n" style="color: #333;">mb_name</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="724" style="width: 35px; color: rgba(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="734" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

734

</td>

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

<pre style="margin: 0;">+<span id="LC734" class="line" lang="haskell">        <span class="n" style="color: #333;">addErr</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">withHsDocContext</span> <span class="p">(</span><span class="n" style="color: #333;">rtke_ctxt</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</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="724" style="width: 35px; color: rgba(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="735" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

735

</td>

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<pre style="margin: 0;">+<span id="LC735" class="line" lang="haskell">        <span class="n" style="color: #333;">notInScopeErr</span> <span class="n" style="color: #333;">rdr_name</span></span>

</pre>

</td>

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<td class="diff-line-num old_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

</td>

<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

</td>

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

<pre style="margin: 0;"> <span id="LC736" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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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

</td>

<td class="diff-line-num new_line" data-linenumber="737" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

737

</td>

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

<pre style="margin: 0;"> <span id="LC737" class="line" lang="haskell"><span class="n" style="color: #333;">rnHsTyKi</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">ty</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsExplicitListTy</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ip</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span></span>

</pre>

</td>

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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

</td>

<td class="diff-line-num new_line" data-linenumber="738" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

738

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<pre style="margin: 0;"> <span id="LC738" 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;">data_kinds</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;">DataKinds</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="744" style="width: 35px; color: rgba(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">@@ -744,6 +756,39 @@ rnHsArrow _env (HsLinearArrow u) = return (HsLinearArrow u, emptyFVs)</td>

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744

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756

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<pre style="margin: 0;"> <span id="LC756" class="line" lang="haskell"><span class="n" style="color: #333;">rnHsArrow</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsExplicitMult</span> <span class="n" style="color: #333;">u</span> <span class="n" style="color: #333;">p</span><span class="p">)</span></span>

</pre>

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745

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757

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<pre style="margin: 0;"> <span id="LC757" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="n" style="color: #333;">mult</span><span class="p">,</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsExplicitMult</span> <span class="n" style="color: #333;">u</span> <span class="n" style="color: #333;">mult</span><span class="p">,</span> <span class="n" style="color: #333;">fvs</span><span class="p">))</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">rnLHsTyKi</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">p</span></span>

</pre>

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746

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758

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<pre style="margin: 0;"> <span id="LC758" class="line" lang="haskell"></span>

</pre>

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759

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<pre style="margin: 0;">+<span id="LC759" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>

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760

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<pre style="margin: 0;">+<span id="LC760" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Renaming HsCoreTys]</span></span>

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761

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<pre style="margin: 0;">+<span id="LC761" 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="762" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

762

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<pre style="margin: 0;">+<span id="LC762" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">HsCoreTy is an escape hatch that allows embedding Core Types in HsTypes.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="763" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

763

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<pre style="margin: 0;">+<span id="LC763" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">As such, there's not much to be done in order to rename an HsCoreTy,</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="764" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

764

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<pre style="margin: 0;">+<span id="LC764" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">since it's already been renamed to some extent. However, in an attempt to</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="765" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

765

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<pre style="margin: 0;">+<span id="LC765" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">detect ill-formed HsCoreTys, the renamer checks to see if all free type</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="766" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

766

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<pre style="margin: 0;">+<span id="LC766" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">variables in an HsCoreTy are in scope. To see why this can matter, consider</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC767" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">this example from #18914:</span></span>

</pre>

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768

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<pre style="margin: 0;">+<span id="LC768" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC769" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  type T f = forall a. f a</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC770" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC771" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  class C f where</span></span>

</pre>

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772

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<pre style="margin: 0;">+<span id="LC772" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    m :: T f</span></span>

</pre>

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773

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<pre style="margin: 0;">+<span id="LC773" class="line" lang="haskell"></span>

</pre>

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774

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<pre style="margin: 0;">+<span id="LC774" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  newtype N f a = MkN (f a)</span></span>

</pre>

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775

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<pre style="margin: 0;">+<span id="LC775" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    deriving C</span></span>

</pre>

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</td>

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776

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<pre style="margin: 0;">+<span id="LC776" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="777" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

777

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<pre style="margin: 0;">+<span id="LC777" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Because of #18914, a previous GHC would generate the following code:</span></span>

</pre>

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</td>

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778

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<pre style="margin: 0;">+<span id="LC778" class="line" lang="haskell"></span>

</pre>

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</td>

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779

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<pre style="margin: 0;">+<span id="LC779" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  instance C f => C (N f) where</span></span>

</pre>

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780

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<pre style="margin: 0;">+<span id="LC780" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    m :: T (N f)</span></span>

</pre>

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781

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<pre style="margin: 0;">+<span id="LC781" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    m = coerce @(f a)   -- The type within @(...) is an HsCoreTy</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="782" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

782

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<pre style="margin: 0;">+<span id="LC782" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">               @(N f a) -- So is this</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="783" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

783

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<pre style="margin: 0;">+<span id="LC783" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">               (m @f)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="784" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

784

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<pre style="margin: 0;">+<span id="LC784" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="747" style="width: 35px; color: rgba(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="785" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

785

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<pre style="margin: 0;">+<span id="LC785" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There are two HsCoreTys in play—(f a) and (N f a)—both of which have</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="786" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

786

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<pre style="margin: 0;">+<span id="LC786" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`f` and `a` as free type variables. The `f` is in scope from the instance head,</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="787" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

787

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<pre style="margin: 0;">+<span id="LC787" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">but `a` is completely unbound, which is what led to #18914. To avoid this sort</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="788" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

788

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<pre style="margin: 0;">+<span id="LC788" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of mistake going forward, the renamer will now detect that `a` is unbound and</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="789" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

789

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<pre style="margin: 0;">+<span id="LC789" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">throw an error accordingly.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="747" style="width: 35px; color: rgba(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="790" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

790

</td>

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<pre style="margin: 0;">+<span id="LC790" 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="747" style="width: 35px; color: rgba(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="791" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

791

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<pre style="margin: 0;">+<span id="LC791" class="line" lang="haskell"></span>

</pre>

</td>

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747

</td>

<td class="diff-line-num new_line" data-linenumber="792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

792

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<pre style="margin: 0;"> <span id="LC792" 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_line" data-linenumber="748" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

748

</td>

<td class="diff-line-num new_line" data-linenumber="793" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

793

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<pre style="margin: 0;"> <span id="LC793" class="line" lang="haskell"><span class="n" style="color: #333;">rnTyVar</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RnTyKiEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RdrName</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RnM</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span></span>

</pre>

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749

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794

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<pre style="margin: 0;"> <span id="LC794" class="line" lang="haskell"><span class="n" style="color: #333;">rnTyVar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">rdr_name</span></span>

</pre>

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<br>

</li>

<li id="3aa56839e36b2219f9ad54f5646ef3005da9c672">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a93435b991513b71174c807b4e99ad90f4e5058#3aa56839e36b2219f9ad54f5646ef3005da9c672"><strong>compiler/GHC/Tc/Deriv/Generate.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1819" style="width: 35px; color: rgba(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="1819" style="width: 35px; color: rgba(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">@@ -1819,6 +1819,94 @@ a truly higher-rank type like so:</td>

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1819

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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;">Then the same situation will arise again. But at least it won't arise for the</span></span>

</pre>

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1820

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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;">common case of methods with ordinary, prenex-quantified types.</span></span>

</pre>

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1821

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1821

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<pre style="margin: 0;"> <span id="LC1821" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_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">

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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;">-----</span></span>

</pre>

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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;">-- Wrinkle: Use HsOuterExplicit</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;">-----</span></span>

</pre>

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<td class="diff-line-num new old_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">

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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>

</pre>

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<td class="diff-line-num new old_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">

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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;">One minor complication with the plan above is that we need to ensure that the</span></span>

</pre>

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<td class="diff-line-num new old_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">

</td>

<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 class="cm" style="color: #998; font-style: italic;">type variables from a method's instance signature properly scope over the body</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">of the method. For example, recall:</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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>

</pre>

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<td class="diff-line-num new old_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">

</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 class="cm" style="color: #998; font-style: italic;">  instance (C m, forall p q. Coercible p q => Coercible (m p) (m q)) =></span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">      C (T m) where</span></span>

</pre>

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<td class="diff-line-num new old_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">

</td>

<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 class="cm" style="color: #998; font-style: italic;">    join :: forall a. T m (T m a) -> T m a</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">    join = coerce @(  m   (m a) ->   m a)</span></span>

</pre>

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<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;">                  @(T m (T m a) -> T m a)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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;">                  join</span></span>

</pre>

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1836

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<pre style="margin: 0;">+<span id="LC1836" class="line" lang="haskell"></span>

</pre>

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<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;">In the example above, it is imperative that the `a` in the instance signature</span></span>

</pre>

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<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 class="cm" style="color: #998; font-style: italic;">for `join` scope over the body of `join` by way of ScopedTypeVariables.</span></span>

</pre>

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<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;">This might sound obvious, but note that in gen_Newtype_binds, which is</span></span>

</pre>

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<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;">responsible for generating the code above, the type in `join`'s instance</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 class="cm" style="color: #998; font-style: italic;">signature is given as a Core type, whereas gen_Newtype_binds will eventually</span></span>

</pre>

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<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;">produce HsBinds (i.e., source Haskell) that is renamed and typechecked. We</span></span>

</pre>

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<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;">must ensure that `a` is in scope over the body of `join` during renaming</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;">or else the generated code will be rejected.</span></span>

</pre>

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<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>

</pre>

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<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 class="cm" style="color: #998; font-style: italic;">In short, we need to convert the instance signature from a Core type to an</span></span>

</pre>

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<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;">HsType (i.e., a source Haskell type). Two possible options are:</span></span>

</pre>

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<td class="diff-line-num new old_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">

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<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>

</pre>

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<td class="diff-line-num new old_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">

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<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;">1. Convert the Core type entirely to an HsType (i.e., a source Haskell type).</span></span>

</pre>

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<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;">2. Embed the entire Core type using HsCoreTy.</span></span>

</pre>

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<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>

</pre>

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<td class="diff-line-num new old_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">

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<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;">Neither option is quite satisfactory:</span></span>

</pre>

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<td class="diff-line-num new old_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">

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<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>

</pre>

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<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 class="cm" style="color: #998; font-style: italic;">1. Converting a Core type to an HsType in full generality is surprisingly</span></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;">   complicated. Previous versions of GHCs did this, but it was the source of</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;">   numerous bugs (see #14579 and #16518, for instance).</span></span>

</pre>

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</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;">2. While HsCoreTy is much less complicated that option (1), it's not quite</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">   what we want. In order for `a` to be in scope over the body of `join` during</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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 class="cm" style="color: #998; font-style: italic;">   renaming, the `forall` must be contained in an HsOuterExplicit.</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">   (See Note [Lexically scoped type variables] in GHC.Hs.Type.) HsCoreTy</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">   bypasses HsOuterExplicit, so this won't work either.</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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>

</pre>

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<td class="diff-line-num new old_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">

</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;">As a compromise, we adopt a combination of the two options above:</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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

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<pre style="margin: 0;">+<span id="LC1864" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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

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<pre style="margin: 0;">+<span id="LC1865" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Split apart the top-level ForAllTys in the instance signature's Core type,</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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

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<pre style="margin: 0;">+<span id="LC1866" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Convert the top-level ForAllTys to an HsOuterExplicit, and</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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;">* Embed the remainder of the Core type in an HsCoreTy.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_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">

</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;">This retains most of the simplicity of option (2) while still ensuring that</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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 class="cm" style="color: #998; font-style: italic;">the type variables are correctly scoped.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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

</td>

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<pre style="margin: 0;">+<span id="LC1871" 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="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">

</td>

<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;">Note that splitting apart top-level ForAllTys will expand any type synonyms</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="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">

</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;">in the Core type itself. This ends up being important to fix a corner case</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="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">

</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;">observed in #18914. Consider this example:</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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

</td>

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<pre style="margin: 0;">+<span id="LC1875" class="line" lang="haskell"></span>

</pre>

</td>

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</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;">  type T f = forall a. f a</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>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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;">  class C f where</span></span>

</pre>

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</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;">    m :: T f</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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>

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<td class="diff-line-num new old_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">

</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;">  newtype N f a = MkN (f a)</span></span>

</pre>

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</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;">    deriving C</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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

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<pre style="margin: 0;">+<span id="LC1883" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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;">What code should `deriving C` generate? It will have roughly the following</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">shape:</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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

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<pre style="margin: 0;">+<span id="LC1886" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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

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<pre style="margin: 0;">+<span id="LC1887" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  instance C f => C (N f) where</span></span>

</pre>

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</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 class="cm" style="color: #998; font-style: italic;">    m :: T (N f)</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">    m = coerce @(...) (...) (m @f)</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>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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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<pre style="margin: 0;">+<span id="LC1891" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">At a minimum, we must instantiate `coerce` with `@(T f)` and `@(T (N f))`, but</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">with the `forall`s removed in order to make them monotypes. However, the</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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 class="cm" style="color: #998; font-style: italic;">`forall` is hidden underneath the `T` type synonym, so we must first expand `T`</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">before we can strip of the `forall`. Expanding `T`, we get</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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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<pre style="margin: 0;">+<span id="LC1895" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`coerce @(forall a. f a) @(forall a. N f a)`, and after omitting the `forall`s,</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">we get `coerce @(f a) @(N f a)`.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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

</td>

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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="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">

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

<pre style="margin: 0;">+<span id="LC1898" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We can't stop there, however, or else we would end up with this code:</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1899" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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 class="cm" style="color: #998; font-style: italic;">  instance C f => C (N f) where</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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;">    m :: T (N f)</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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;">    m = coerce @(f a) @(N f a) (m @f)</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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

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<pre style="margin: 0;">+<span id="LC1904" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Notice that the type variable `a` is completely unbound. In order to make sure</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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

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<pre style="margin: 0;">+<span id="LC1905" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">that `a` is in scope, we must /also/ expand the `T` in `m :: T (N f)` to get</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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;">`m :: forall a. N f a`. Fortunately, we will do just that in the plan outlined</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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 class="cm" style="color: #998; font-style: italic;">above, since when we split off the top-level ForAllTys in the instance</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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;">signature, we must first expand the T type synonym.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_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">

</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

</td>

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<pre style="margin: 0;">+<span id="LC1909" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1822" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1822

</td>

<td class="diff-line-num new_line" data-linenumber="1910" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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;">Note [GND and ambiguity]</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1823" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1823

</td>

<td class="diff-line-num new_line" data-linenumber="1911" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1911

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<pre style="margin: 0;"> <span id="LC1911" 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="1824" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1824

</td>

<td class="diff-line-num new_line" data-linenumber="1912" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1912

</td>

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<pre style="margin: 0;"> <span id="LC1912" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We make an effort to make the code generated through GND be robust w.r.t.</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1891" style="width: 35px; color: rgba(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="1979" style="width: 35px; color: rgba(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">@@ -1891,13 +1979,30 @@ gen_Newtype_binds loc cls inst_tvs inst_tys rhs_ty</td>

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<td class="diff-line-num old_line" data-linenumber="1891" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1891

</td>

<td class="diff-line-num new_line" data-linenumber="1979" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1979

</td>

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<pre style="margin: 0;"> <span id="LC1979" class="line" lang="haskell">        <span class="p">,</span> <span class="c1" style="color: #998; font-style: italic;">-- The derived instance signature, e.g.,</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1892" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1892

</td>

<td class="diff-line-num new_line" data-linenumber="1980" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1980

</td>

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<pre style="margin: 0;"> <span id="LC1980" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="1893" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1893

</td>

<td class="diff-line-num new_line" data-linenumber="1981" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1981

</td>

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

<pre style="margin: 0;"> <span id="LC1981" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">--   op :: forall c. a -> [T x] -> c -> 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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1982" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">--</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1983" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- Make sure that `forall c` is in an HsOuterExplicit so that it</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1984" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- scopes over the body of `op`. See "Wrinkle: Use HsOuterExplicit" in</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1985" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- Note [GND and QuantifiedConstraints].</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1894" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1894

</td>

<td class="diff-line-num new_line" data-linenumber="1986" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1986

</td>

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

<pre style="margin: 0;"> <span id="LC1986" class="line" lang="haskell">          <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">ClassOpSig</span> <span class="n" style="color: #333;">noExtField</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="p">[</span><span class="n" style="color: #333;">loc_meth_RDR</span><span class="p">]</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="1895" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1895

</td>

<td class="diff-line-num new_line old" data-linenumber="1987" style="width: 35px; color: rgba(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="LC1895" class="line" lang="haskell">                <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkHsImplicitSigType</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">nlHsCoreTy</span> <span class="n" style="color: #333;">to_ty</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1987" class="line" lang="haskell">                <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkHsExplicitSigType</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1988" class="line" lang="haskell">                            <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">mk_hs_tvb</span> <span class="n" style="color: #333;">to_tvbs</span><span class="p">)</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1989" class="line" lang="haskell">                            <span class="p">(</span><span class="n" style="color: #333;">nlHsCoreTy</span> <span class="n" style="color: #333;">to_rho</span><span class="p">)</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1896" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1896

</td>

<td class="diff-line-num new_line" data-linenumber="1990" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1990

</td>

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

<pre style="margin: 0;"> <span id="LC1990" class="line" lang="haskell">        <span class="p">)</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1897" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1897

</td>

<td class="diff-line-num new_line" data-linenumber="1991" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1991

</td>

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

<pre style="margin: 0;"> <span id="LC1991" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1898" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1898

</td>

<td class="diff-line-num new_line" data-linenumber="1992" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1992

</td>

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

<pre style="margin: 0;"> <span id="LC1992" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">from_ty</span> <span class="n" style="color: #333;">to_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkCoerceClassMethEqn</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">inst_tvs</span> <span class="n" style="color: #333;">inst_tys</span> <span class="n" style="color: #333;">rhs_ty</span> <span class="n" style="color: #333;">meth_id</span></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="1899" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1899

</td>

<td class="diff-line-num new_line old" data-linenumber="1993" style="width: 35px; color: rgba(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="LC1899" class="line" lang="haskell">        <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">from_tau</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcSplitSigmaTy</span> <span class="n" style="color: #333;">from_ty</span></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="1900" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1900

</td>

<td class="diff-line-num new_line old" data-linenumber="1993" style="width: 35px; color: rgba(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="LC1900" class="line" lang="haskell">        <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">to_tau</span><span class="p">)</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcSplitSigmaTy</span> <span class="n" style="color: #333;">to_ty</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1993" class="line" lang="haskell">        <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">from_tau</span><span class="p">)</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcSplitSigmaTy</span> <span class="n" style="color: #333;">from_ty</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1994" class="line" lang="haskell">        <span class="p">(</span><span class="n" style="color: #333;">to_tvbs</span><span class="p">,</span> <span class="n" style="color: #333;">to_rho</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcSplitForAllInvisTVBinders</span> <span class="n" style="color: #333;">to_ty</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="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">

</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

</td>

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<pre style="margin: 0;">+<span id="LC1995" class="line" lang="haskell">        <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">to_tau</span><span class="p">)</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcSplitPhiTy</span> <span class="n" style="color: #333;">to_rho</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1996" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- The use of tcSplitForAllInvisTVBinders above expands type synonyms,</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1997" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- which is important to ensure correct type variable scoping.</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1998" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- See "Wrinkle: Use HsOuterExplicit" in</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC1999" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Note [GND and QuantifiedConstraints].</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="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">

</td>

<td class="diff-line-num new new_line" data-linenumber="2000" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2000

</td>

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

<pre style="margin: 0;">+<span id="LC2000" 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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC2001" class="line" lang="haskell">        <span class="n" style="color: #333;">mk_hs_tvb</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">VarBndr</span> <span class="kt" style="color: #458; font-weight: 600;">TyVar</span> <span class="n" style="color: #333;">flag</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsTyVarBndr</span> <span class="n" style="color: #333;">flag</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC2002" class="line" lang="haskell">        <span class="n" style="color: #333;">mk_hs_tvb</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Bndr</span> <span class="n" style="color: #333;">tv</span> <span class="n" style="color: #333;">flag</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noLoc</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">KindedTyVar</span> <span class="n" style="color: #333;">noExtField</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC2003" class="line" lang="haskell">                                                       <span class="n" style="color: #333;">flag</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC2004" class="line" lang="haskell">                                                       <span class="p">(</span><span class="n" style="color: #333;">noLoc</span> <span class="p">(</span><span class="n" style="color: #333;">getRdrName</span> <span class="n" style="color: #333;">tv</span><span class="p">))</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="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">

</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

</td>

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

<pre style="margin: 0;">+<span id="LC2005" class="line" lang="haskell">                                                       <span class="p">(</span><span class="n" style="color: #333;">nlHsCoreTy</span> <span class="p">(</span><span class="n" style="color: #333;">tyVarKind</span> <span class="n" style="color: #333;">tv</span><span class="p">))</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1901" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1901

</td>

<td class="diff-line-num new_line" data-linenumber="2006" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2006

</td>

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

<pre style="margin: 0;"> <span id="LC2006" 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="1902" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1902

</td>

<td class="diff-line-num new_line" data-linenumber="2007" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2007

</td>

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

<pre style="margin: 0;"> <span id="LC2007" class="line" lang="haskell">        <span class="n" style="color: #333;">meth_RDR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getRdrName</span> <span class="n" style="color: #333;">meth_id</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1903" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1903

</td>

<td class="diff-line-num new_line" data-linenumber="2008" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2008

</td>

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

<pre style="margin: 0;"> <span id="LC2008" class="line" lang="haskell">        <span class="n" style="color: #333;">loc_meth_RDR</span> <span class="o" style="font-weight: 600;">=</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;">meth_RDR</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="1950" style="width: 35px; color: rgba(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="2055" style="width: 35px; color: rgba(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">@@ -1950,8 +2055,8 @@ nlHsAppType e s = noLoc (HsAppType noExtField e hs_ty)</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1950" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1950

</td>

<td class="diff-line-num new_line" data-linenumber="2055" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2055

</td>

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

<pre style="margin: 0;"> <span id="LC2055" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1951" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1951

</td>

<td class="diff-line-num new_line" data-linenumber="2056" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2056

</td>

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

<pre style="margin: 0;"> <span id="LC2056" class="line" lang="haskell">    <span class="n" style="color: #333;">hs_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkHsWildCardBndrs</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">parenthesizeHsType</span> <span class="n" style="color: #333;">appPrec</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">nlHsCoreTy</span> <span class="n" style="color: #333;">s</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1952" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1952

</td>

<td class="diff-line-num new_line" data-linenumber="2057" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2057

</td>

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

<pre style="margin: 0;"> <span id="LC2057" 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="1953" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1953

</td>

<td class="diff-line-num new_line old" data-linenumber="2058" style="width: 35px; color: rgba(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="LC1953" class="line" lang="haskell"><span class="n" style="color: #333;">nlHsCoreTy</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Type</span></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;">GhcPs</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1954" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1954

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<td class="diff-line-num new_line old" data-linenumber="2058" style="width: 35px; color: rgba(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="LC1954" class="line" lang="haskell"><span class="n" style="color: #333;">nlHsCoreTy</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noLoc</span> <span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">XHsType</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">NHsCoreTy</span></span></span>

</pre>

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<td class="diff-line-num new old_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">

</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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<pre style="margin: 0;">+<span id="LC2058" class="line" lang="haskell"><span class="n" style="color: #333;">nlHsCoreTy</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">HsCoreTy</span></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;">GhcPs</span></span>

</pre>

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<td class="diff-line-num new old_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">

</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="n" style="color: #333;">nlHsCoreTy</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noLoc</span> <span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">XHsType</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1955" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1955

</td>

<td class="diff-line-num new_line" data-linenumber="2060" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2060

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<pre style="margin: 0;"> <span id="LC2060" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1956" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1956

</td>

<td class="diff-line-num new_line" data-linenumber="2061" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2061

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<pre style="margin: 0;"> <span id="LC2061" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoerceClassMethEqn</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Class</span>   <span class="c1" style="color: #998; font-style: italic;">-- the class being derived</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1957" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1957

</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="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;">-- the tvs in the instance head (this includes</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2079" style="width: 35px; color: rgba(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="2184" style="width: 35px; color: rgba(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">@@ -2079,15 +2184,15 @@ genAuxBindSpecDup loc original_rdr_name dup_spec</td>

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<td class="diff-line-num old_line" data-linenumber="2079" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2079

</td>

<td class="diff-line-num new_line" data-linenumber="2184" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2184

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<pre style="margin: 0;"> <span id="LC2184" class="line" lang="haskell"><span class="n" style="color: #333;">genAuxBindSpecSig</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">AuxBindSpec</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsSigWcType</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2080" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2080

</td>

<td class="diff-line-num new_line" data-linenumber="2185" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2185

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<pre style="margin: 0;"> <span id="LC2185" class="line" lang="haskell"><span class="n" style="color: #333;">genAuxBindSpecSig</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">spec</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">spec</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="2081" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2081

</td>

<td class="diff-line-num new_line" data-linenumber="2186" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2186

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<pre style="margin: 0;"> <span id="LC2186" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">DerivCon2Tag</span> <span class="n" style="color: #333;">tycon</span> <span class="kr" style="font-weight: 600;">_</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2082

</td>

<td class="diff-line-num new_line old" data-linenumber="2187" style="width: 35px; color: rgba(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="LC2082" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mk_sig</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="o" style="font-weight: 600;">$</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">NHsCoreTy</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">$</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2083" style="width: 35px; color: rgba(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="2187" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2187

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<pre style="margin: 0;">+<span id="LC2187" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mk_sig</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">XHsType</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="2083" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2083

</td>

<td class="diff-line-num new_line" data-linenumber="2188" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2188

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<pre style="margin: 0;"> <span id="LC2188" class="line" lang="haskell">       <span class="n" style="color: #333;">mkSpecSigmaTy</span> <span class="p">(</span><span class="n" style="color: #333;">tyConTyVars</span> <span class="n" style="color: #333;">tycon</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">tyConStupidTheta</span> <span class="n" style="color: #333;">tycon</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_line" data-linenumber="2084" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2084

</td>

<td class="diff-line-num new_line" data-linenumber="2189" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2189

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<pre style="margin: 0;"> <span id="LC2189" class="line" lang="haskell">       <span class="n" style="color: #333;">mkParentType</span> <span class="n" style="color: #333;">tycon</span> <span class="p">`</span><span class="n" style="color: #333;">mkVisFunTyMany</span><span class="p">`</span> <span class="n" style="color: #333;">intPrimTy</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2085" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2085

</td>

<td class="diff-line-num new_line" data-linenumber="2190" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2190

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<pre style="margin: 0;"> <span id="LC2190" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">DerivTag2Con</span> <span class="n" style="color: #333;">tycon</span> <span class="kr" style="font-weight: 600;">_</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2086" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2086

</td>

<td class="diff-line-num new_line" data-linenumber="2191" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2191

</td>

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<pre style="margin: 0;"> <span id="LC2191" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mk_sig</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="o" style="font-weight: 600;">$</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="2087" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2087

</td>

<td class="diff-line-num new_line old" data-linenumber="2192" style="width: 35px; color: rgba(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="LC2087" class="line" lang="haskell">       <span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NHsCoreTy</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">mkSpecForAllTys</span> <span class="p">(</span><span class="n" style="color: #333;">tyConTyVars</span> <span class="n" style="color: #333;">tycon</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="2088" style="width: 35px; color: rgba(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="2192" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2192

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<pre style="margin: 0;">+<span id="LC2192" class="line" lang="haskell">       <span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkSpecForAllTys</span> <span class="p">(</span><span class="n" style="color: #333;">tyConTyVars</span> <span class="n" style="color: #333;">tycon</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2088" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2088

</td>

<td class="diff-line-num new_line" data-linenumber="2193" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2193

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<pre style="margin: 0;"> <span id="LC2193" class="line" lang="haskell">       <span class="n" style="color: #333;">intTy</span> <span class="p">`</span><span class="n" style="color: #333;">mkVisFunTyMany</span><span class="p">`</span> <span class="n" style="color: #333;">mkParentType</span> <span class="n" style="color: #333;">tycon</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2089" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2089

</td>

<td class="diff-line-num new_line" data-linenumber="2194" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2194

</td>

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

<pre style="margin: 0;"> <span id="LC2194" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">DerivMaxTag</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</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="2090" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2090

</td>

<td class="diff-line-num new_line old" data-linenumber="2195" style="width: 35px; color: rgba(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="LC2090" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mk_sig</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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">NHsCoreTy</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">intTy</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="2091" style="width: 35px; color: rgba(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="2195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2195

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<pre style="margin: 0;">+<span id="LC2195" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mk_sig</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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="n" style="color: #333;"><span class="idiff left right">intTy</span></span><span class="p">))</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2091" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2091

</td>

<td class="diff-line-num new_line" data-linenumber="2196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2196

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

<pre style="margin: 0;"> <span id="LC2196" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">DerivDataDataType</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2092" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2092

</td>

<td class="diff-line-num new_line" data-linenumber="2197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2197

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<pre style="margin: 0;"> <span id="LC2197" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mk_sig</span> <span class="p">(</span><span class="n" style="color: #333;">nlHsTyVar</span> <span class="n" style="color: #333;">dataType_RDR</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="2093" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2093

</td>

<td class="diff-line-num new_line" data-linenumber="2198" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2198

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<pre style="margin: 0;"> <span id="LC2198" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">DerivDataConstr</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span></span>

</pre>

</td>

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<br>

</li>

<li id="9355bef855426caf5f526925edf351b20f9a86c4">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a93435b991513b71174c807b4e99ad90f4e5058#9355bef855426caf5f526925edf351b20f9a86c4"><strong>compiler/GHC/Tc/Gen/HsType.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="947" style="width: 35px; color: rgba(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="947" style="width: 35px; color: rgba(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">@@ -947,8 +947,8 @@ tc_infer_hs_type mode (HsSpliceTy _ (HsSpliced _ _ (HsSplicedTy ty)))</td>

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<td class="diff-line-num old_line" data-linenumber="947" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

947

</td>

<td class="diff-line-num new_line" data-linenumber="947" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

947

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

<pre style="margin: 0;"> <span id="LC947" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="948" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

948

</td>

<td class="diff-line-num new_line" data-linenumber="948" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

948

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<pre style="margin: 0;"> <span id="LC948" class="line" lang="haskell"><span class="n" style="color: #333;">tc_infer_hs_type</span> <span class="n" style="color: #333;">mode</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsDocTy</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ty</span> <span class="kr" style="font-weight: 600;">_</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="n" style="color: #333;">mode</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="949" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

949

</td>

<td class="diff-line-num new_line" data-linenumber="949" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

949

</td>

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

<pre style="margin: 0;"> <span id="LC949" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="950" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

950

</td>

<td class="diff-line-num new_line old" data-linenumber="950" style="width: 35px; color: rgba(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="LC950" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Typechecking <span class="idiff left right">N</span>HsCoreTys]</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="951" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

951

</td>

<td class="diff-line-num new_line old" data-linenumber="950" style="width: 35px; color: rgba(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="LC951" class="line" lang="haskell"><span class="n" style="color: #333;">tc_infer_hs_type</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">NHsCoreTy</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty</span></span><span class="p"><span class="idiff right">)</span>)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="952" style="width: 35px; color: rgba(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="950" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

950

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<pre style="margin: 0;">+<span id="LC950" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Typechecking HsCoreTys]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC951" class="line" lang="haskell"><span class="n" style="color: #333;">tc_infer_hs_type</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="n" style="color: #333;"><span class="idiff left right">ty</span></span><span class="p">)</span></span>

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952

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<pre style="margin: 0;"> <span id="LC952" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getLclEnv</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC953" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Raw uniques since we go from NameEnv to TvSubstEnv.</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC954" class="line" lang="haskell">       <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">subst_prs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Unique</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TcTyVar</span><span class="p">)]</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">@@ -972,21 +972,21 @@ tc_infer_hs_type mode other_ty</td>

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<pre style="margin: 0;"> <span id="LC972" 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;">kv</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC973" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC974" 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_line old" 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">

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<pre style="margin: 0;">-<span id="LC975" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Typechecking <span class="idiff left right">N</span>HsCoreTys]</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC976" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<span class="idiff left right">~</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="977" style="width: 35px; color: rgba(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="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">

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<pre style="margin: 0;">-<span id="LC977" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">N</span>HsCoreTy is an escape hatch that allows embedding Core Types in HsTypes.</span></span>

</pre>

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<td class="diff-line-num new_line old" 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">

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<pre style="margin: 0;">-<span id="LC978" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">As such, there's not much to be done in order to typecheck an <span class="idiff left right">N</span>HsCoreTy,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC975" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Typechecking HsCoreTys]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC976" 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 old_line" data-linenumber="979" style="width: 35px; color: rgba(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="977" style="width: 35px; color: rgba(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="LC977" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">HsCoreTy is an escape hatch that allows embedding Core Types in HsTypes.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC978" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">As such, there's not much to be done in order to typecheck an HsCoreTy,</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC979" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">since it's already been typechecked to some extent. There is one thing that</span></span>

</pre>

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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;">we must do, however: we must substitute the type variables from the tcl_env.</span></span>

</pre>

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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;">To see why, consider GeneralizedNewtypeDeriving, which is one of the main</span></span>

</pre>

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982

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<td class="diff-line-num new_line old" data-linenumber="982" style="width: 35px; color: rgba(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="LC982" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">clients of <span class="idiff left right">N</span>HsCoreTy (example adapted from #14579):</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="983" style="width: 35px; color: rgba(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="982" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

982

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<pre style="margin: 0;">+<span id="LC982" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">clients of HsCoreTy (example adapted from #14579):</span></span>

</pre>

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983

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983

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<pre style="margin: 0;"> <span id="LC983" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="984" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

984

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984

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<pre style="margin: 0;"> <span id="LC984" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  newtype T a = MkT a deriving newtype Eq</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="985" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

985

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985

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<pre style="margin: 0;"> <span id="LC985" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="986" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

986

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986

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<pre style="margin: 0;"> <span id="LC986" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This will produce an InstInfo GhcPs that looks roughly like this:</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="987" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

987

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987

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<pre style="margin: 0;"> <span id="LC987" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="988" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

988

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988

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<pre style="margin: 0;"> <span id="LC988" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  instance forall a_1. Eq a_1 => Eq (T a_1) where</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="989" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

989

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<pre style="margin: 0;">-<span id="LC989" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (==) = coerce @(  a_1 ->   a_1 -> Bool) -- The type within @(...) is an <span class="idiff left right">N</span>HsCoreTy</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="990" style="width: 35px; color: rgba(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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989

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<pre style="margin: 0;">+<span id="LC989" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (==) = coerce @(  a_1 ->   a_1 -> Bool) -- The type within @(...) is an HsCoreTy</span></span>

</pre>

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990

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990

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<pre style="margin: 0;"> <span id="LC990" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                  @(T a_1 -> T a_1 -> Bool) -- So is this</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="991" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

991

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991

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<pre style="margin: 0;"> <span id="LC991" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">                  (==)</span></span>

</pre>

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992

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992

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<pre style="margin: 0;"> <span id="LC992" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1002" style="width: 35px; color: rgba(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="1002" style="width: 35px; color: rgba(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">@@ -1002,9 +1002,9 @@ environment (tcl_env) with [a_1 :-> a_2]. This gives us:</td>

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1002

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1002

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<pre style="margin: 0;"> <span id="LC1002" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1003" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1003

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1003

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<pre style="margin: 0;"> <span id="LC1003" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">To ensure that the body of this instance is well scoped, every occurrence of</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1004" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1004

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1004

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<pre style="margin: 0;"> <span id="LC1004" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the `a` type variable should refer to a_2, the new skolem. However, the</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1005" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1005

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<td class="diff-line-num new_line old" data-linenumber="1005" style="width: 35px; color: rgba(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="LC1005" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">N</span>HsCoreTys mention a_1, not a_2. Luckily, the tcl_env provides exactly the</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1006" style="width: 35px; color: rgba(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="1005" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1005

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<pre style="margin: 0;">+<span id="LC1005" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">HsCoreTys mention a_1, not a_2. Luckily, the tcl_env provides exactly the</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1006" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1006

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1006

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<pre style="margin: 0;"> <span id="LC1006" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">substitution we need ([a_1 :-> a_2]) to fix up the scoping. We apply this</span></span>

</pre>

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1007

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<pre style="margin: 0;">-<span id="LC1007" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">substitution to each <span class="idiff left right">N</span>HsCoreTy and all is well:</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1008" style="width: 35px; color: rgba(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="1007" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1007

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<pre style="margin: 0;">+<span id="LC1007" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">substitution to each HsCoreTy and all is well:</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1008" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1008

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1008

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<pre style="margin: 0;"> <span id="LC1008" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1009" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1009

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1009

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<pre style="margin: 0;"> <span id="LC1009" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  instance forall a_2. Eq a_2 => Eq (T a_2) where</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1010" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1010

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<td class="diff-line-num new_line" data-linenumber="1010" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1010

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<pre style="margin: 0;"> <span id="LC1010" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (==) = coerce @(  a_2 ->   a_2 -> Bool)</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1206" style="width: 35px; color: rgba(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="1206" style="width: 35px; color: rgba(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">@@ -1206,7 +1206,7 @@ tc_hs_type mode ty@(HsAppTy {})            ek = tc_infer_hs_type_ek mode ty ek</td>

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<td class="diff-line-num old_line" data-linenumber="1206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1206

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<td class="diff-line-num new_line" data-linenumber="1206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1206

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<pre style="margin: 0;"> <span id="LC1206" class="line" lang="haskell"><span class="n" style="color: #333;">tc_hs_type</span> <span class="n" style="color: #333;">mode</span> <span class="n" style="color: #333;">ty</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsAppKindTy</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;">tc_infer_hs_type_ek</span> <span class="n" style="color: #333;">mode</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">ek</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1207

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1207

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<pre style="margin: 0;"> <span id="LC1207" class="line" lang="haskell"><span class="n" style="color: #333;">tc_hs_type</span> <span class="n" style="color: #333;">mode</span> <span class="n" style="color: #333;">ty</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsOpTy</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;">tc_infer_hs_type_ek</span> <span class="n" style="color: #333;">mode</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">ek</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1208

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<td class="diff-line-num new_line" data-linenumber="1208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1208

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<pre style="margin: 0;"> <span id="LC1208" class="line" lang="haskell"><span class="n" style="color: #333;">tc_hs_type</span> <span class="n" style="color: #333;">mode</span> <span class="n" style="color: #333;">ty</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsKindSig</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;">tc_infer_hs_type_ek</span> <span class="n" style="color: #333;">mode</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">ek</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1209

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<td class="diff-line-num new_line old" data-linenumber="1209" style="width: 35px; color: rgba(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="LC1209" class="line" lang="haskell"><span class="n" style="color: #333;">tc_hs_type</span> <span class="n" style="color: #333;">mode</span> <span class="n" style="color: #333;">ty</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">NHsCoreTy</span></span><span class="p"><span class="idiff right">{}))</span></span> <span class="n" style="color: #333;">ek</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tc_infer_hs_type_ek</span> <span class="n" style="color: #333;">mode</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">ek</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1210" style="width: 35px; color: rgba(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="1209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1209

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<pre style="margin: 0;">+<span id="LC1209" class="line" lang="haskell"><span class="n" style="color: #333;">tc_hs_type</span> <span class="n" style="color: #333;">mode</span> <span class="n" style="color: #333;">ty</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="p"><span class="idiff left">{})</span></span><span class="idiff right">           </span> <span class="n" style="color: #333;">ek</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tc_infer_hs_type_ek</span> <span class="n" style="color: #333;">mode</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">ek</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1210" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1210

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<td class="diff-line-num new_line" data-linenumber="1210" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1210

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<pre style="margin: 0;"> <span id="LC1210" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1211

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1211

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<pre style="margin: 0;"> <span id="LC1211" 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="1212" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1212

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1212

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<pre style="margin: 0;"> <span id="LC1212" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Variable Specificity and Forall Visibility]</span></span>

</pre>

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<br>

</li>

<li id="eade747fa0a15693c67617629e286714fce958e4">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a93435b991513b71174c807b4e99ad90f4e5058#eade747fa0a15693c67617629e286714fce958e4"><strong>compiler/GHC/Tc/Gen/Sig.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="291" style="width: 35px; color: rgba(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="291" style="width: 35px; color: rgba(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">@@ -291,7 +291,7 @@ no_anon_wc_ty lty = go lty</td>

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<td class="diff-line-num old_line" data-linenumber="291" style="width: 35px; color: rgba(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="LC291" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">HsTyLit</span><span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

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<td class="diff-line-num 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">

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<pre style="margin: 0;"> <span id="LC292" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">HsTyVar</span><span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

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<pre style="margin: 0;"> <span id="LC293" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">HsStarTy</span><span class="p">{}</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

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<td class="diff-line-num new_line old" data-linenumber="294" style="width: 35px; color: rgba(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="LC294" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">XHsType</span><span class="idiff left"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">NHsCoreTy</span></span><span class="p"><span class="idiff">{})</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">True</span></span><span class="idiff">      </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- Core type</span>, which does not have any wildcard</span></span>

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<pre style="margin: 0;">+<span id="LC294" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">XHsType</span><span class="p"><span class="idiff left">{}</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">True</span></span><span class="idiff">       </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- HsCoreTy</span>, which does not have any wildcard</span></span>

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<pre style="margin: 0;"> <span id="LC295" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC296" class="line" lang="haskell">    <span class="n" style="color: #333;">gos</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">all</span> <span class="n" style="color: #333;">go</span></span>

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<pre style="margin: 0;"> <span id="LC297" class="line" lang="haskell"></span>

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<li id="e63425e031ffe9350ee6b1687e506aaea75d11e1">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a93435b991513b71174c807b4e99ad90f4e5058#e63425e031ffe9350ee6b1687e506aaea75d11e1"><strong>compiler/GHC/Tc/TyCl/Instance.hs</strong></a>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2082" style="width: 35px; color: rgba(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="LC2082" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC2083" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_vta</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsExpr</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span></span>

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<pre style="margin: 0;"> <span id="LC2084" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_vta</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noLoc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsAppType</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">fun</span> <span class="p">(</span><span class="n" style="color: #333;">mkEmptyWildCardBndrs</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">nlHsParTy</span></span>

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2085

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<pre style="margin: 0;">-<span id="LC2085" class="line" lang="haskell">                                                <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">noLoc</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="o" style="font-weight: 600;"><span class="idiff left">$</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">NHsCoreTy</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">ty</span><span class="p">))</span></span>

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<pre style="margin: 0;">+<span id="LC2085" class="line" lang="haskell">                                                <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">noLoc</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">XHsType</span> <span class="n" style="color: #333;">ty</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC2086" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- NB: use visible type application</span></span>

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<pre style="margin: 0;"> <span id="LC2087" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- See Note [Default methods in instances]</span></span>

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<pre style="margin: 0;"> <span id="LC2088" class="line" lang="haskell"></span>

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<li id="d67e8c37b660b851784cafe36eb0327428012ff0">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a93435b991513b71174c807b4e99ad90f4e5058#d67e8c37b660b851784cafe36eb0327428012ff0"><strong>testsuite/tests/deriving/should_compile/T14578.stderr</strong></a>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="9" style="width: 35px; color: rgba(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">@@ -9,9 +9,8 @@ Derived class instances:</td>

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="plaintext">    GHC.Base.sconcat ::</span>

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="plaintext">      GHC.Base.NonEmpty (T14578.Wat f g a) -> T14578.Wat f g a</span>

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="plaintext">    GHC.Base.stimes ::</span>

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<pre style="margin: 0;">-<span id="LC12" class="line" lang="plaintext">      forall b.</span>

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<pre style="margin: 0;">-<span id="LC13" class="line" lang="plaintext">      GHC.Real.Integral b =></span>

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<pre style="margin: 0;">-<span id="LC14" class="line" lang="plaintext">      b -> T14578.Wat f g a -> T14578.Wat f g a</span>

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="plaintext">      forall (b :: *).</span>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="plaintext">      GHC.Real.Integral b => b -> T14578.Wat f g a -> T14578.Wat f g a</span>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="plaintext">    (GHC.Base.<>)</span>

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<pre style="margin: 0;"> <span id="LC15" class="line" lang="plaintext">      = GHC.Prim.coerce</span>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="plaintext">          @(T14578.App (Data.Functor.Compose.Compose f g) a</span>

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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">@@ -38,8 +37,10 @@ Derived class instances:</td>

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<pre style="margin: 0;"> <span id="LC37" class="line" lang="plaintext">  instance GHC.Base.Functor f =></span>

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<pre style="margin: 0;"> <span id="LC38" class="line" lang="plaintext">           GHC.Base.Functor (T14578.App f) where</span>

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<pre style="margin: 0;"> <span id="LC39" class="line" lang="plaintext">    GHC.Base.fmap ::</span>

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<pre style="margin: 0;">-<span id="LC41" class="line" lang="plaintext">      forall a b. (a -> b) -> T14578.App f a -> T14578.App f b</span>

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<pre style="margin: 0;">-<span id="LC42" class="line" lang="plaintext">    (GHC.Base.<$) :: forall a b. a -> T14578.App f b -> T14578.App f a</span>

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<pre style="margin: 0;">+<span id="LC40" class="line" lang="plaintext">      forall (a :: *) (b :: *).</span>

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<pre style="margin: 0;">+<span id="LC41" class="line" lang="plaintext">      (a -> b) -> T14578.App f a -> T14578.App f b</span>

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<pre style="margin: 0;">+<span id="LC42" class="line" lang="plaintext">    (GHC.Base.<$) ::</span>

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<pre style="margin: 0;">+<span id="LC43" class="line" lang="plaintext">      forall (a :: *) (b :: *). a -> T14578.App f b -> T14578.App f a</span>

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<pre style="margin: 0;"> <span id="LC44" class="line" lang="plaintext">    GHC.Base.fmap</span>

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<pre style="margin: 0;"> <span id="LC45" class="line" lang="plaintext">      = GHC.Prim.coerce</span>

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<pre style="margin: 0;"> <span id="LC46" class="line" lang="plaintext">          @((a -> b) -> f a -> f b)</span>

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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">@@ -51,17 +52,19 @@ Derived class instances:</td>

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<pre style="margin: 0;"> <span id="LC52" class="line" lang="plaintext">  </span>

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<pre style="margin: 0;"> <span id="LC53" class="line" lang="plaintext">  instance GHC.Base.Applicative f =></span>

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<pre style="margin: 0;"> <span id="LC54" class="line" lang="plaintext">           GHC.Base.Applicative (T14578.App f) where</span>

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<pre style="margin: 0;">-<span id="LC54" class="line" lang="plaintext">    GHC.Base.pure :: forall <span class="idiff left right">a</span>. a -> T14578.App f a</span>

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<pre style="margin: 0;">+<span id="LC55" class="line" lang="plaintext">    GHC.Base.pure :: forall <span class="idiff left right">(a :: *)</span>. a -> T14578.App f a</span>

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<pre style="margin: 0;"> <span id="LC56" class="line" lang="plaintext">    (GHC.Base.<*>) ::</span>

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<pre style="margin: 0;">-<span id="LC56" class="line" lang="plaintext">      forall <span class="idiff left right">a b</span>.</span>

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<pre style="margin: 0;">+<span id="LC57" class="line" lang="plaintext">      forall <span class="idiff left right">(a :: *) (b :: *)</span>.</span>

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<pre style="margin: 0;"> <span id="LC58" class="line" lang="plaintext">      T14578.App f (a -> b) -> T14578.App f a -> T14578.App f b</span>

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<pre style="margin: 0;"> <span id="LC59" class="line" lang="plaintext">    GHC.Base.liftA2 ::</span>

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<pre style="margin: 0;">-<span id="LC59" class="line" lang="plaintext">      forall <span class="idiff left right">a b c</span>.</span>

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<pre style="margin: 0;">+<span id="LC60" class="line" lang="plaintext">      forall <span class="idiff left right">(a :: *) (b :: *) (c :: *)</span>.</span>

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<pre style="margin: 0;"> <span id="LC61" class="line" lang="plaintext">      (a -> b -> c) -> T14578.App f a -> T14578.App f b -> T14578.App f c</span>

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<pre style="margin: 0;"> <span id="LC62" class="line" lang="plaintext">    (GHC.Base.*>) ::</span>

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<pre style="margin: 0;">-<span id="LC62" class="line" lang="plaintext">      forall a b. T14578.App f a -> T14578.App f b -> T14578.App f b</span>

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<pre style="margin: 0;">+<span id="LC63" class="line" lang="plaintext">      forall (a :: *) (b :: *).</span>

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<pre style="margin: 0;">+<span id="LC64" class="line" lang="plaintext">      T14578.App f a -> T14578.App f b -> T14578.App f b</span>

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<pre style="margin: 0;"> <span id="LC65" class="line" lang="plaintext">    (GHC.Base.<*) ::</span>

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<pre style="margin: 0;">-<span id="LC64" class="line" lang="plaintext">      forall a b. T14578.App f a -> T14578.App f b -> T14578.App f a</span>

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<pre style="margin: 0;">+<span id="LC66" class="line" lang="plaintext">      forall (a :: *) (b :: *).</span>

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<pre style="margin: 0;">+<span id="LC67" class="line" lang="plaintext">      T14578.App f a -> T14578.App f b -> T14578.App f a</span>

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<pre style="margin: 0;"> <span id="LC68" class="line" lang="plaintext">    GHC.Base.pure</span>

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<pre style="margin: 0;"> <span id="LC69" class="line" lang="plaintext">      = GHC.Prim.coerce</span>

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<pre style="margin: 0;"> <span id="LC70" class="line" lang="plaintext">          @(a -> f a) @(a -> T14578.App f a) (GHC.Base.pure @f)</span>

</pre>

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</li>

<li id="6c3a9e0a20f8145c45cc4c63b44430dd29ba7555">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a93435b991513b71174c807b4e99ad90f4e5058#6c3a9e0a20f8145c45cc4c63b44430dd29ba7555"><strong>testsuite/tests/deriving/should_compile/T18914.hs</strong></a>

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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 GeneralizedNewtypeDeriving #-}</span></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE RankNTypes #-}</span></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;">T18914</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>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">T</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">a</span></span>

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">class</span> <span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="n" style="color: #333;">f</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell">  <span class="n" style="color: #333;">m1</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">T</span> <span class="n" style="color: #333;">f</span></span>

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell">  <span class="n" style="color: #333;">m2</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">a</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;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">N</span> <span class="n" style="color: #333;">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;">MkN</span> <span class="p">(</span><span class="n" style="color: #333;">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 class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;">C</span></span></pre>

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<li id="e7bc29da08da2be1b3bd264c751322dc3e8c1905">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a93435b991513b71174c807b4e99ad90f4e5058#e7bc29da08da2be1b3bd264c751322dc3e8c1905"><strong>testsuite/tests/deriving/should_compile/all.T</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">@@ -127,3 +127,4 @@ test('T17339', normal, compile,</td>

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<td class="diff-line-num old_line" data-linenumber="127" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

127

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<td class="diff-line-num new_line" data-linenumber="127" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

127

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<pre style="margin: 0;"> <span id="LC127" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17880</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="128" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

128

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<td class="diff-line-num new_line" data-linenumber="128" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

128

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<pre style="margin: 0;"> <span id="LC128" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18055</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="129" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

129

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<td class="diff-line-num new_line" data-linenumber="129" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

129

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<pre style="margin: 0;"> <span id="LC129" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18321</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 new old_line" data-linenumber="130" style="width: 35px; color: rgba(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="130" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

130

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<pre style="margin: 0;">+<span id="LC130" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18914</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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<br>

</li>

<li id="46ddb8dda2edd2df4717a3285e83997fc812a347">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a93435b991513b71174c807b4e99ad90f4e5058#46ddb8dda2edd2df4717a3285e83997fc812a347"><strong>utils/haddock</strong></a>

<hr>

<table class="code white" style="font-family: monospace; font-size: 90%;" bgcolor="#fff" width="100%" cellpadding="0" cellspacing="0">

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

1

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<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(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;">-Subproject commit <span class="idiff left right">059acb11d6134ee0d896bcf73c870958557a3909</span></pre>

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<td class="diff-line-num new old_line" data-linenumber="2" style="width: 35px; color: rgba(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="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1

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<pre style="margin: 0;">+Subproject commit <span class="idiff left right">c3b276d94e207717731512d1e1f8b59b729b653a</span></pre>

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