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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/eb9bdaef6024558696e1e50b12d7fefb70483a9f">eb9bdaef</a></strong>

<div>

<span>by Simon Peyton Jones</span>

<i>at 2020-08-19T18:48:14-04:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add right-to-left rule for pattern bindings

Fix #18323 by adding a few lines of code to handle non-recursive

pattern bindings.  see GHC.Tc.Gen.Bind

Note [Special case for non-recursive pattern bindings]

Alas, this confused the pattern-match overlap checker; see #18323.

Note that this patch only affects pattern bindings like that

for (x,y) in this program

  combine :: (forall a . [a] -> a) -> [forall a. a -> a]

          -> ((forall a . [a] -> a), [forall a. a -> a])

  breaks = let (x,y) = combine head ids

           in x y True

We need ImpredicativeTypes for those [forall a. a->a] types to be

valid. And with ImpredicativeTypes the old, unprincipled "allow

unification variables to unify with a polytype" story actually

works quite well. So this test compiles fine (if delicatedly) with

old GHCs; but not with QuickLook unless we add this patch

</pre>

</li>

</ul>

<h4>14 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#65ca06d51797ebf672a62bde6c00bcb9444e1425">

compiler/GHC/Hs/Binds.hs

</a>

</li>

<li class="file-stats">

<a href="#65e2067fbb7377818b6cadff0531f44029499948">

compiler/GHC/HsToCore/Binds.hs

</a>

</li>

<li class="file-stats">

<a href="#6bdd5abc649727f2a802bc96ce5c276de19d3726">

compiler/GHC/HsToCore/Expr.hs

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</li>

<li class="file-stats">

<a href="#83f745d921da7adb739e81f83e1c07e723e4a789">

compiler/GHC/Tc/Gen/Bind.hs

</a>

</li>

<li class="file-stats">

<a href="#3377164bfe9a1f1a8cfd588703ae1e0ea1e91cf9">

compiler/GHC/Tc/Gen/Match.hs

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</li>

<li class="file-stats">

<a href="#b28f2a9a42f420338f6ed7df6d45db22d24f195b">

compiler/GHC/Tc/Gen/Match.hs-boot

</a>

</li>

<li class="file-stats">

<a href="#6a120b0673f8920127d8fffdaa16f01b90cc92d7">

compiler/GHC/Tc/Utils/Zonk.hs

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<li class="file-stats">

<a href="#84db639cfe8dd70e30a3ffcf189d3928af34b9c7">

<span class="new-file">

+

testsuite/tests/typecheck/should_compile/T18323.hs

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<li class="file-stats">

<a href="#34fe7bf0e6fbf60effb28393399ba68666593909">

testsuite/tests/typecheck/should_compile/all.T

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<li class="file-stats">

<a href="#2d39b93f115a9e0a15702aaad1c45608b03bb12d">

testsuite/tests/typecheck/should_fail/T8570.stderr

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</li>

<li class="file-stats">

<a href="#1c8d7b6a16fb7869940093e489cb1b646193ee97">

testsuite/tests/typecheck/should_fail/tcfail004.stderr

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<li class="file-stats">

<a href="#376d5b6b4c545329c0c56dec7a169a896c093b98">

testsuite/tests/typecheck/should_fail/tcfail005.stderr

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</li>

<li class="file-stats">

<a href="#f9cc9e584e23c3c84a116f84baa271441097be15">

testsuite/tests/typecheck/should_fail/tcfail012.stderr

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</li>

<li class="file-stats">

<a href="#c78abed5d33b2a4e1d37e3fb40f816c68920929b">

testsuite/tests/warnings/should_fail/CaretDiagnostics1.stderr

</a>

</li>

</ul>

<h4>Changes:</h4>

<li id="65ca06d51797ebf672a62bde6c00bcb9444e1425">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#65ca06d51797ebf672a62bde6c00bcb9444e1425"><strong>compiler/GHC/Hs/Binds.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="317" style="width: 35px; color: rgba(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="317" style="width: 35px; color: rgba(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">@@ -317,18 +317,13 @@ data HsBindLR idL idR</td>

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<pre style="margin: 0;"> <span id="LC317" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC318" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">XHsBindsLR</span> <span class="o" style="font-weight: 600;">!</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">XXHsBindsLR</span> <span class="n" style="color: #333;">idL</span> <span class="n" style="color: #333;">idR</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC319" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="320" style="width: 35px; color: rgba(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="LC320" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">NPatBindTc</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NPatBindTc</span> <span class="p">{</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC321" class="line" lang="haskell">     <span class="n" style="color: #333;">pat_fvs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NameSet</span><span class="p">,</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ Free variables</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="322" style="width: 35px; color: rgba(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="320" style="width: 35px; color: rgba(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="LC322" class="line" lang="haskell">     <span class="n" style="color: #333;">pat_rhs_ty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span>  <span class="c1" style="color: #998; font-style: italic;">-- ^ Type of the GRHSs</span></span>

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<pre style="margin: 0;">-<span id="LC323" class="line" lang="haskell">     <span class="p">}</span> <span class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;">Data</span></span>

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<pre style="margin: 0;">-<span id="LC324" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC320" 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;">XFunBind</span>    <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pL</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>

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<pre style="margin: 0;"> <span id="LC321" 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;">XFunBind</span>    <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pL</span><span class="p">)</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;">NameSet</span>    <span class="c1" style="color: #998; font-style: italic;">-- Free variables</span></span>

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<td class="diff-line-num old_line" data-linenumber="327" style="width: 35px; color: rgba(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="LC322" 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;">XFunBind</span>    <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pL</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HsWrapper</span>  <span class="c1" style="color: #998; font-style: italic;">-- See comments on FunBind.fun_ext</span></span>

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<pre style="margin: 0;"> <span id="LC324" 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;">XPatBind</span>    <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pR</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 new_line" data-linenumber="325" style="width: 35px; color: rgba(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="LC325" 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;">XPatBind</span>    <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pR</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NameSet</span> <span class="c1" style="color: #998; font-style: italic;">-- Free variables</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="326" style="width: 35px; color: rgba(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="LC331" 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;">XPatBind</span>    <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pR</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">NPatBindTc</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="332" style="width: 35px; color: rgba(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="LC326" 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;">XPatBind</span>    <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pR</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">Type</span></span><span class="idiff">    </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- Type of the GRHSs</span></span></span>

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<pre style="margin: 0;"> <span id="LC327" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="328" style="width: 35px; color: rgba(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="LC328" 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;">XVarBind</span>    <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pL</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pR</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 new_line" data-linenumber="329" style="width: 35px; color: rgba(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="LC329" 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;">XAbsBinds</span>   <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pL</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="n" style="color: #333;">pR</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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<br>

</li>

<li id="65e2067fbb7377818b6cadff0531f44029499948">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#65e2067fbb7377818b6cadff0531f44029499948"><strong>compiler/GHC/HsToCore/Binds.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="182" style="width: 35px; color: rgba(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="182" style="width: 35px; color: rgba(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">@@ -182,7 +182,7 @@ dsHsBind dflags b@(FunBind { fun_id = L loc fun</td>

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<pre style="margin: 0;"> <span id="LC182" class="line" lang="haskell">          <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">force_var</span><span class="p">,</span> <span class="p">[</span><span class="n" style="color: #333;">core_binds</span><span class="p">])</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC183" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC184" class="line" lang="haskell"><span class="n" style="color: #333;">dsHsBind</span> <span class="n" style="color: #333;">dflags</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatBind</span> <span class="p">{</span> <span class="n" style="color: #333;">pat_lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pat</span><span class="p">,</span> <span class="n" style="color: #333;">pat_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</span></span>

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<pre style="margin: 0;">-<span id="LC185" class="line" lang="haskell">                         <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NPatBindTc</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">ty</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC185" class="line" lang="haskell">                         <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

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

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<pre style="margin: 0;"> <span id="LC186" class="line" lang="haskell">                         <span class="p">,</span> <span class="n" style="color: #333;">pat_ticks</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">rhs_tick</span><span class="p">,</span> <span class="n" style="color: #333;">var_ticks</span><span class="p">)</span> <span class="p">})</span></span>

</pre>

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

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<pre style="margin: 0;"> <span id="LC187" 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;">rhss_deltas</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">checkGRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">PatBindGuards</span> <span class="n" style="color: #333;">grhss</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC188" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">body_expr</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">dsGuarded</span> <span class="n" style="color: #333;">grhss</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">rhss_deltas</span></span>

</pre>

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<li id="6bdd5abc649727f2a802bc96ce5c276de19d3726">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#6bdd5abc649727f2a802bc96ce5c276de19d3726"><strong>compiler/GHC/HsToCore/Expr.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="212" style="width: 35px; color: rgba(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="212" style="width: 35px; color: rgba(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">@@ -212,7 +212,7 @@ dsUnliftedBind (FunBind { fun_id = L l fun</td>

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<pre style="margin: 0;"> <span id="LC212" 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;">bindNonRec</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">rhs'</span> <span class="n" style="color: #333;">body</span><span class="p">)</span> <span class="p">}</span></span>

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213

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213

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<pre style="margin: 0;"> <span id="LC213" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC214" class="line" lang="haskell"><span class="n" style="color: #333;">dsUnliftedBind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatBind</span> <span class="p">{</span><span class="n" style="color: #333;">pat_lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pat</span><span class="p">,</span> <span class="n" style="color: #333;">pat_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</span></span>

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<pre style="margin: 0;">-<span id="LC215" class="line" lang="haskell">                        <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NPatBindTc</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">ty</span> <span class="p">})</span> <span class="n" style="color: #333;">body</span></span>

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<pre style="margin: 0;">+<span id="LC215" class="line" lang="haskell">                        <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ty</span> <span class="p">})</span> <span class="n" style="color: #333;">body</span></span>

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<pre style="margin: 0;"> <span id="LC216" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span>     <span class="c1" style="color: #998; font-style: italic;">-- let C x# y# = rhs in body</span></span>

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<pre style="margin: 0;"> <span id="LC217" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- ==> case rhs of C x# y# -> body</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC218" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">match_deltas</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">checkGRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">PatBindGuards</span> <span class="n" style="color: #333;">grhss</span></span>

</pre>

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<li id="83f745d921da7adb739e81f83e1c07e723e4a789">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#83f745d921da7adb739e81f83e1c07e723e4a789"><strong>compiler/GHC/Tc/Gen/Bind.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1274" style="width: 35px; color: rgba(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="1274" style="width: 35px; color: rgba(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">@@ -1274,20 +1274,15 @@ tcMonoBinds :: RecFlag  -- Whether the binding is recursive for typechecking pur</td>

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<pre style="margin: 0;"> <span id="LC1274" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcSigFun</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LetBndrSpec</span></span>

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<pre style="margin: 0;"> <span id="LC1275" 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;">LHsBind</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">]</span></span>

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<td class="diff-line-num old_line" data-linenumber="1276" style="width: 35px; color: rgba(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="1276" style="width: 35px; color: rgba(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="LC1276" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsBinds</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">MonoBindInfo</span><span class="p">])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1277" style="width: 35px; color: rgba(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="1277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1277

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<pre style="margin: 0;">+<span id="LC1277" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1277" style="width: 35px; color: rgba(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="1278" style="width: 35px; color: rgba(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="LC1278" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- SPECIAL CASE 1: see Note [Inference for non-recursive function bindings]</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1279" class="line" lang="haskell"><span class="n" style="color: #333;">tcMonoBinds</span> <span class="n" style="color: #333;">is_rec</span> <span class="n" style="color: #333;">sig_fn</span> <span class="n" style="color: #333;">no_gen</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1280" class="line" lang="haskell">           <span class="p">[</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">b_loc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">FunBind</span> <span class="p">{</span> <span class="n" style="color: #333;">fun_id</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;">nm_loc</span> <span class="n" style="color: #333;">name</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1279" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1279

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<td class="diff-line-num new_line" data-linenumber="1281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1281

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<pre style="margin: 0;"> <span id="LC1281" class="line" lang="haskell">                              <span class="p">,</span> <span class="n" style="color: #333;">fun_matches</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">matches</span> <span class="p">})]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1280" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1280

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<td class="diff-line-num new_line" data-linenumber="1282" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1282

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<pre style="margin: 0;"> <span id="LC1282" class="line" lang="haskell">                             <span class="c1" style="color: #998; font-style: italic;">-- Single function binding,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1281

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<td class="diff-line-num new_line" data-linenumber="1283" style="width: 35px; color: rgba(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="LC1283" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">NonRecursive</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">is_rec</span>   <span class="c1" style="color: #998; font-style: italic;">-- ...binder isn't mentioned in RHS</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1282" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1282

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<td class="diff-line-num new_line" data-linenumber="1284" style="width: 35px; color: rgba(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="LC1284" class="line" lang="haskell">  <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">sig_fn</span> <span class="n" style="color: #333;">name</span>   <span class="c1" style="color: #998; font-style: italic;">-- ...with no type signature</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1283" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1283

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<td class="diff-line-num new_line old" data-linenumber="1285" style="width: 35px; color: rgba(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="LC1283" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span>     <span class="c1" style="color: #998; font-style: italic;">-- Note [Single function non-recursive binding special-case]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1284" style="width: 35px; color: rgba(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="1285" style="width: 35px; color: rgba(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="LC1284" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1285" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1285

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<td class="diff-line-num new_line old" data-linenumber="1285" style="width: 35px; color: rgba(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="LC1285" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- In this very special case we infer the type of the</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1286" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1286

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<td class="diff-line-num new_line old" data-linenumber="1285" style="width: 35px; color: rgba(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="LC1286" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- right hand side first (it may have a higher-rank type)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1287" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1287

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<td class="diff-line-num new_line old" data-linenumber="1285" style="width: 35px; color: rgba(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="LC1287" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- and *then* make the monomorphic Id for the LHS</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1288" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1288

</td>

<td class="diff-line-num new_line old" data-linenumber="1285" style="width: 35px; color: rgba(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="LC1288" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- e.g.         f = \(x::forall a. a->a) -> <body></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1289" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1289

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<td class="diff-line-num new_line old" data-linenumber="1285" style="width: 35px; color: rgba(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="LC1289" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--      We want to infer a higher-rank type for f</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1290" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1290

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<td class="diff-line-num new_line old" data-linenumber="1285" style="width: 35px; color: rgba(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="LC1290" class="line" lang="haskell">    <span class="n" style="color: #333;">setSrcSpan</span> <span class="n" style="color: #333;">b_loc</span>    <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1291" style="width: 35px; color: rgba(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="1285" style="width: 35px; color: rgba(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="LC1285" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setSrcSpan</span> <span class="n" style="color: #333;">b_loc</span>    <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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1291

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<td class="diff-line-num new_line" data-linenumber="1286" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1286

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<pre style="margin: 0;"> <span id="LC1286" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span> <span class="p">((</span><span class="n" style="color: #333;">co_fn</span><span class="p">,</span> <span class="n" style="color: #333;">matches'</span><span class="p">),</span> <span class="n" style="color: #333;">rhs_ty</span><span class="p">)</span></span>

</pre>

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1292

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1287

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<pre style="margin: 0;"> <span id="LC1287" class="line" lang="haskell">            <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInfer</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;">exp_ty</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1293" style="width: 35px; color: rgba(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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1288

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<pre style="margin: 0;"> <span id="LC1288" class="line" lang="haskell">               <span class="n" style="color: #333;">tcExtendBinderStack</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TcIdBndr_ExpType</span> <span class="n" style="color: #333;">name</span> <span class="n" style="color: #333;">exp_ty</span> <span class="kt" style="color: #458; font-weight: 600;">NotTopLevel</span><span class="p">]</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1305" style="width: 35px; color: rgba(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="1300" style="width: 35px; color: rgba(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">@@ -1305,6 +1300,29 @@ tcMonoBinds is_rec sig_fn no_gen</td>

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1305

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<td class="diff-line-num new_line" data-linenumber="1300" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1300

</td>

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<pre style="margin: 0;"> <span id="LC1300" class="line" lang="haskell">                       <span class="p">,</span> <span class="n" style="color: #333;">mbi_sig</span>       <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</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="1306" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1306

</td>

<td class="diff-line-num new_line" data-linenumber="1301" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1301

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<pre style="margin: 0;"> <span id="LC1301" class="line" lang="haskell">                       <span class="p">,</span> <span class="n" style="color: #333;">mbi_mono_id</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mono_id</span> <span class="p">}])</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="1307" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1307

</td>

<td class="diff-line-num new_line" data-linenumber="1302" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1302

</td>

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

<pre style="margin: 0;"> <span id="LC1302" 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="1308" style="width: 35px; color: rgba(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="1303" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1303

</td>

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

<pre style="margin: 0;">+<span id="LC1303" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- SPECIAL CASE 2: see Note [Inference for non-recursive pattern bindings]</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="1308" style="width: 35px; color: rgba(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="1304" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1304

</td>

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

<pre style="margin: 0;">+<span id="LC1304" class="line" lang="haskell"><span class="n" style="color: #333;">tcMonoBinds</span> <span class="n" style="color: #333;">is_rec</span> <span class="n" style="color: #333;">sig_fn</span> <span class="n" style="color: #333;">no_gen</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="1308" style="width: 35px; color: rgba(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="1305" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1305

</td>

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

<pre style="margin: 0;">+<span id="LC1305" class="line" lang="haskell">           <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">b_loc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatBind</span> <span class="p">{</span> <span class="n" style="color: #333;">pat_lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pat</span><span class="p">,</span> <span class="n" style="color: #333;">pat_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</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="1308" style="width: 35px; color: rgba(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="1306" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1306

</td>

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

<pre style="margin: 0;">+<span id="LC1306" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">NonRecursive</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">is_rec</span>   <span class="c1" style="color: #998; font-style: italic;">-- ...binder isn't mentioned in RHS</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="1308" style="width: 35px; color: rgba(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="1307" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1307

</td>

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

<pre style="margin: 0;">+<span id="LC1307" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">all</span> <span class="p">(</span><span class="n" style="color: #333;">isNothing</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">sig_fn</span><span class="p">)</span> <span class="n" style="color: #333;">bndrs</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="1308" style="width: 35px; color: rgba(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="1308" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1308

</td>

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

<pre style="margin: 0;">+<span id="LC1308" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">patMonoBindsCtxt</span> <span class="n" style="color: #333;">pat</span> <span class="n" style="color: #333;">grhss</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="1308" style="width: 35px; color: rgba(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="1309" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1309

</td>

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

<pre style="margin: 0;">+<span id="LC1309" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">grhss'</span><span class="p">,</span> <span class="n" style="color: #333;">pat_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInfer</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;">exp_ty</span> <span class="o" style="font-weight: 600;">-></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="1308" style="width: 35px; color: rgba(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="1310" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1310

</td>

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

<pre style="margin: 0;">+<span id="LC1310" class="line" lang="haskell">                             <span class="n" style="color: #333;">tcGRHSsPat</span> <span class="n" style="color: #333;">grhss</span> <span class="n" style="color: #333;">exp_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="1308" style="width: 35px; color: rgba(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="1311" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1311

</td>

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

<pre style="margin: 0;">+<span id="LC1311" 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="1308" style="width: 35px; color: rgba(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="1312" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1312

</td>

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

<pre style="margin: 0;">+<span id="LC1312" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">exp_pat_ty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Scaled</span> <span class="kt" style="color: #458; font-weight: 600;">ExpSigmaType</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="1308" style="width: 35px; color: rgba(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="1313" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1313

</td>

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

<pre style="margin: 0;">+<span id="LC1313" class="line" lang="haskell">             <span class="n" style="color: #333;">exp_pat_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unrestricted</span> <span class="p">(</span><span class="n" style="color: #333;">mkCheckExpType</span> <span class="n" style="color: #333;">pat_ty</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="1308" style="width: 35px; color: rgba(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="1314" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1314

</td>

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

<pre style="margin: 0;">+<span id="LC1314" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">pat'</span><span class="p">,</span> <span class="n" style="color: #333;">mbis</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcLetPat</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span><span class="p">)</span> <span class="n" style="color: #333;">no_gen</span> <span class="n" style="color: #333;">pat</span> <span class="n" style="color: #333;">exp_pat_ty</span> <span class="o" style="font-weight: 600;">$</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="1308" style="width: 35px; color: rgba(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="1315" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1315

</td>

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

<pre style="margin: 0;">+<span id="LC1315" class="line" lang="haskell">                         <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">lookupMBI</span> <span class="n" style="color: #333;">bndrs</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="1308" style="width: 35px; color: rgba(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="1316" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1316

</td>

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

<pre style="margin: 0;">+<span id="LC1316" class="line" lang="haskell"></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1317" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1317

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<pre style="margin: 0;">+<span id="LC1317" 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;">unitBag</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">b_loc</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1308" style="width: 35px; color: rgba(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="1318" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1318

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<pre style="margin: 0;">+<span id="LC1318" class="line" lang="haskell">                     <span class="kt" style="color: #458; font-weight: 600;">PatBind</span> <span class="p">{</span> <span class="n" style="color: #333;">pat_lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pat'</span><span class="p">,</span> <span class="n" style="color: #333;">pat_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss'</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1308" style="width: 35px; color: rgba(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="1319" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1319

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<pre style="margin: 0;">+<span id="LC1319" class="line" lang="haskell">                             <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pat_ty</span><span class="p">,</span> <span class="n" style="color: #333;">pat_ticks</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1308" style="width: 35px; color: rgba(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="1320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1320

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<pre style="margin: 0;">+<span id="LC1320" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1308" style="width: 35px; color: rgba(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="1321" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1321

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<pre style="margin: 0;">+<span id="LC1321" class="line" lang="haskell">                <span class="p">,</span> <span class="n" style="color: #333;">mbis</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="1308" style="width: 35px; color: rgba(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="1322" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1322

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<pre style="margin: 0;">+<span id="LC1322" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1308" style="width: 35px; color: rgba(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="1323" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1323

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<pre style="margin: 0;">+<span id="LC1323" class="line" lang="haskell">    <span class="n" style="color: #333;">bndrs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">collectPatBinders</span> <span class="n" style="color: #333;">pat</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1308" style="width: 35px; color: rgba(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="1324" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1324

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<pre style="margin: 0;">+<span id="LC1324" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1308" style="width: 35px; color: rgba(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="1325" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1325

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<pre style="margin: 0;">+<span id="LC1325" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- GENERAL CASE</span></span>

</pre>

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1308

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<td class="diff-line-num new_line" data-linenumber="1326" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1326

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<pre style="margin: 0;"> <span id="LC1326" class="line" lang="haskell"><span class="n" style="color: #333;">tcMonoBinds</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">sig_fn</span> <span class="n" style="color: #333;">no_gen</span> <span class="n" style="color: #333;">binds</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1309" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1309

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<td class="diff-line-num new_line" data-linenumber="1327" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1327

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<pre style="margin: 0;"> <span id="LC1327" 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;">tc_binds</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapM</span> <span class="p">(</span><span class="n" style="color: #333;">wrapLocM</span> <span class="p">(</span><span class="n" style="color: #333;">tcLhs</span> <span class="n" style="color: #333;">sig_fn</span> <span class="n" style="color: #333;">no_gen</span><span class="p">))</span> <span class="n" style="color: #333;">binds</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1310" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1310

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<td class="diff-line-num new_line" data-linenumber="1328" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1328

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<pre style="margin: 0;"> <span id="LC1328" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1327" style="width: 35px; color: rgba(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="1345" style="width: 35px; color: rgba(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">@@ -1327,6 +1345,66 @@ tcMonoBinds _ sig_fn no_gen binds</td>

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<td class="diff-line-num old_line" data-linenumber="1327" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1327

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<td class="diff-line-num new_line" data-linenumber="1345" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1345

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<pre style="margin: 0;"> <span id="LC1345" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1328" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1328

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<td class="diff-line-num new_line" data-linenumber="1346" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1346

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<pre style="margin: 0;"> <span id="LC1346" 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;">listToBag</span> <span class="n" style="color: #333;">binds'</span><span class="p">,</span> <span class="n" style="color: #333;">mono_infos</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1329" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1329

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<td class="diff-line-num new_line" data-linenumber="1347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1347

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

<pre style="margin: 0;"> <span id="LC1347" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1348" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1348

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<pre style="margin: 0;">+<span id="LC1348" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Special case for non-recursive function bindings]</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1349" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1349

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<pre style="margin: 0;">+<span id="LC1349" 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 new_line" data-linenumber="1350" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1350

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<pre style="margin: 0;">+<span id="LC1350" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In the special case of</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1351" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1351

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<pre style="margin: 0;">+<span id="LC1351" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* A non-recursive FunBind</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1352" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1352

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<pre style="margin: 0;">+<span id="LC1352" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* With no type signature</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1353" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1353

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<pre style="margin: 0;">+<span id="LC1353" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we infer the type of the right hand side first (it may have a</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1354" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1354

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<pre style="margin: 0;">+<span id="LC1354" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">higher-rank type) and *then* make the monomorphic Id for the LHS e.g.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1355" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1355

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<pre style="margin: 0;">+<span id="LC1355" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   f = \(x::forall a. a->a) -> <body></span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1356" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1356

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<pre style="margin: 0;">+<span id="LC1356" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1357" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1357

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<pre style="margin: 0;">+<span id="LC1357" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We want to infer a higher-rank type for f</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1358" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1358

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<pre style="margin: 0;">+<span id="LC1358" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1359" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1359

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<pre style="margin: 0;">+<span id="LC1359" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Special case for non-recursive pattern bindings]</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1360" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1360

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<pre style="margin: 0;">+<span id="LC1360" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1361" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1361

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<pre style="margin: 0;">+<span id="LC1361" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In the special case of</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1362" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1362

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<pre style="margin: 0;">+<span id="LC1362" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* A pattern binding</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1363" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1363

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<pre style="margin: 0;">+<span id="LC1363" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* With no type signature for any of the binders</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1364" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1364

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<pre style="margin: 0;">+<span id="LC1364" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we can /infer/ the type of the RHS, and /check/ the pattern</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1365" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1365

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<pre style="margin: 0;">+<span id="LC1365" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">against that type.  For example (#18323)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1366" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1366

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<pre style="margin: 0;">+<span id="LC1366" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="1367" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1367

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<pre style="margin: 0;">+<span id="LC1367" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  ids :: [forall a. a -> a]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1368" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1368

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<pre style="margin: 0;">+<span id="LC1368" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  combine :: (forall a . [a] -> a) -> [forall a. a -> a]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1369" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1369

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<pre style="margin: 0;">+<span id="LC1369" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">          -> ((forall a . [a] -> a), [forall a. a -> a])</span></span>

</pre>

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1370

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<pre style="margin: 0;">+<span id="LC1370" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1371" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1371

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<pre style="margin: 0;">+<span id="LC1371" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  (x,y) = combine head ids</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1372" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1372

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<pre style="margin: 0;">+<span id="LC1372" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1373" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1373

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<pre style="margin: 0;">+<span id="LC1373" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">with -XImpredicativeTypes we can infer a good type for</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1374" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1374

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<pre style="margin: 0;">+<span id="LC1374" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(combine head ids), and use that to tell us the polymorphic</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1375" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1375

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<pre style="margin: 0;">+<span id="LC1375" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">types of x and y.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1376" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1376

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<pre style="margin: 0;">+<span id="LC1376" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1377

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<pre style="margin: 0;">+<span id="LC1377" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We don't need to check -XImpredicativeTypes beucase without it</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1378" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1378

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<pre style="margin: 0;">+<span id="LC1378" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">these types like [forall a. a->a] are illegal anyway, so this</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1379" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1379

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<pre style="margin: 0;">+<span id="LC1379" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">special case code only really has an effect if -XImpredicativeTypes</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1380" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1380

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<pre style="margin: 0;">+<span id="LC1380" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is on.  Small exception:</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1381" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1381

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<pre style="margin: 0;">+<span id="LC1381" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  (x) = e</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1382" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1382

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<pre style="margin: 0;">+<span id="LC1382" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is currently treated as a pattern binding so, even absent</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1383" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1383

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<pre style="margin: 0;">+<span id="LC1383" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-XImpredicativeTypes, we will get a small improvement in behaviour.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1384" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1384

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<pre style="margin: 0;">+<span id="LC1384" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But I don't think it's worth an extension flag.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1385" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1385

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<pre style="margin: 0;">+<span id="LC1385" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1386" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1386

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<pre style="margin: 0;">+<span id="LC1386" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Why do we require no type signatures on /any/ of the binders?</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1387" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1387

</td>

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<pre style="margin: 0;">+<span id="LC1387" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1388" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1388

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<pre style="margin: 0;">+<span id="LC1388" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   x :: forall a. a->a</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1389" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1389

</td>

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<pre style="margin: 0;">+<span id="LC1389" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   y :: forall a. a->a</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1390" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1390

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<pre style="margin: 0;">+<span id="LC1390" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   (x,y) = (id,id)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1391" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1391

</td>

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

<pre style="margin: 0;">+<span id="LC1391" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1392" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1392

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<pre style="margin: 0;">+<span id="LC1392" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Here we should /check/ the RHS with expected type</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1393" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1393

</td>

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<pre style="margin: 0;">+<span id="LC1393" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  (forall a. a->a, forall a. a->a).</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1394" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1394

</td>

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

<pre style="margin: 0;">+<span id="LC1394" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1395" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1395

</td>

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<pre style="margin: 0;">+<span id="LC1395" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">If we have no signatures, we can the approach of this Note</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1396" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1396

</td>

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

<pre style="margin: 0;">+<span id="LC1396" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">to /infer/ the type of the RHS.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1397" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1397

</td>

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

<pre style="margin: 0;">+<span id="LC1397" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1398" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1398

</td>

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<pre style="margin: 0;">+<span id="LC1398" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But what if we have some signatures, but not all? Say this:</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1399" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1399

</td>

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<pre style="margin: 0;">+<span id="LC1399" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  p :: forall a. a->a</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1400" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1400

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<pre style="margin: 0;">+<span id="LC1400" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  (p,q) = (id,  (\(x::forall b. b->b). x True))</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1401" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1401

</td>

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

<pre style="margin: 0;">+<span id="LC1401" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1402" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1402

</td>

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

<pre style="margin: 0;">+<span id="LC1402" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Here we want to push p's signature inwards, i.e. /checking/, to</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1330" style="width: 35px; color: rgba(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="1403" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1403

</td>

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

<pre style="margin: 0;">+<span id="LC1403" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">correctly elaborate 'id'. But we want to /infer/ q's higher rank</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="1330" style="width: 35px; color: rgba(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="1404" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1404

</td>

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

<pre style="margin: 0;">+<span id="LC1404" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">type.  There seems to be no way to do this.  So currently we only</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="1330" style="width: 35px; color: rgba(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="1405" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1405

</td>

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

<pre style="margin: 0;">+<span id="LC1405" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">switch to inference when we have no signature for any of the binders.</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="1330" style="width: 35px; color: rgba(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="1406" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1406

</td>

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

<pre style="margin: 0;">+<span id="LC1406" class="line" lang="haskell"><span class="cm" 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="1330" style="width: 35px; color: rgba(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="1407" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1407

</td>

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

<pre style="margin: 0;">+<span id="LC1407" 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="1330" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1330

</td>

<td class="diff-line-num new_line" data-linenumber="1408" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1408

</td>

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

<pre style="margin: 0;"> <span id="LC1408" 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="1331" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1331

</td>

<td class="diff-line-num new_line" data-linenumber="1409" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1409

</td>

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

<pre style="margin: 0;"> <span id="LC1409" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1332" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1332

</td>

<td class="diff-line-num new_line" data-linenumber="1410" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1410

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<pre style="margin: 0;"> <span id="LC1410" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- tcLhs typechecks the LHS of the bindings, to construct the environment in which</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1394" style="width: 35px; color: rgba(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="1472" style="width: 35px; color: rgba(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">@@ -1394,7 +1472,7 @@ tcLhs sig_fn no_gen (PatBind { pat_lhs = pat, pat_rhs = grhss })</td>

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<td class="diff-line-num old_line" data-linenumber="1394" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1394

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<td class="diff-line-num new_line" data-linenumber="1472" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1472

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<pre style="margin: 0;"> <span id="LC1472" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- The above inferred type get an unrestricted multiplicity. It may be</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1395" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1395

</td>

<td class="diff-line-num new_line" data-linenumber="1473" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1473

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<pre style="margin: 0;"> <span id="LC1473" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- worth it to try and find a finer-grained multiplicity here</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1396" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1396

</td>

<td class="diff-line-num new_line" data-linenumber="1474" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1474

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<pre style="margin: 0;"> <span id="LC1474" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- if examples warrant it.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1397" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1397

</td>

<td class="diff-line-num new_line old" data-linenumber="1475" style="width: 35px; color: rgba(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="LC1397" class="line" lang="haskell">               <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">lookup<span class="idiff left right">_info</span></span> <span class="n" style="color: #333;">nosig_names</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1398" style="width: 35px; color: rgba(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="1475" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1475

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<pre style="margin: 0;">+<span id="LC1475" class="line" lang="haskell">               <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">lookup<span class="idiff left right">MBI</span></span> <span class="n" style="color: #333;">nosig_names</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1398" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1398

</td>

<td class="diff-line-num new_line" data-linenumber="1476" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1476

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

<pre style="margin: 0;"> <span id="LC1476" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1399" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1399

</td>

<td class="diff-line-num new_line" data-linenumber="1477" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1477

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<pre style="margin: 0;"> <span id="LC1477" class="line" lang="haskell">        <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">mbis</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sig_mbis</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">nosig_mbis</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1400" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1400

</td>

<td class="diff-line-num new_line" data-linenumber="1478" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1478

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

<pre style="margin: 0;"> <span id="LC1478" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1412" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1412,19 +1490,19 @@ tcLhs sig_fn no_gen (PatBind { pat_lhs = pat, pat_rhs = grhss })</td>

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<td class="diff-line-num old_line" data-linenumber="1412" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1412

</td>

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

1490

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<pre style="margin: 0;"> <span id="LC1490" class="line" lang="haskell">                      <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcIdSig</span> <span class="n" style="color: #333;">sig</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Right</span> <span class="p">(</span><span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">sig</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1413" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1413

</td>

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

1491

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<pre style="margin: 0;"> <span id="LC1491" class="line" lang="haskell">                      <span class="kr" style="font-weight: 600;">_</span>                  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Left</span> <span class="n" style="color: #333;">name</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1414" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1414

</td>

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

1492

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

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1415" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1415

</td>

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

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<pre style="margin: 0;">-<span id="LC1415" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- After typechecking the pattern, look up the binder</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1416" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1416

</td>

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

</td>

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<pre style="margin: 0;">-<span id="LC1416" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- names that lack a signature, which the pattern has brought</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1417" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1417

</td>

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

</td>

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<pre style="margin: 0;">-<span id="LC1417" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- into scope.</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1418" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1418

</td>

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

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<pre style="margin: 0;">-<span id="LC1418" class="line" lang="haskell">    <span class="n" style="color: #333;">lookup_info</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">MonoBindInfo</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1419" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1419

</td>

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

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<pre style="margin: 0;">-<span id="LC1419" class="line" lang="haskell">    <span class="n" style="color: #333;">lookup_info</span> <span class="n" style="color: #333;">name</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1420" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1420

</td>

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

</td>

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

<pre style="margin: 0;">-<span id="LC1420" 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;">mono_id</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcLookupId</span> <span class="n" style="color: #333;">name</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="1421" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1421

</td>

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

</td>

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

<pre style="margin: 0;">-<span id="LC1421" 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;">MBI</span> <span class="p">{</span> <span class="n" style="color: #333;">mbi_poly_name</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">name</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="1422" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1422

</td>

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

</td>

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

<pre style="margin: 0;">-<span id="LC1422" class="line" lang="haskell">                         <span class="p">,</span> <span class="n" style="color: #333;">mbi_sig</span>       <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</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="1423" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1423

</td>

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

</td>

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

<pre style="margin: 0;">-<span id="LC1423" class="line" lang="haskell">                         <span class="p">,</span> <span class="n" style="color: #333;">mbi_mono_id</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mono_id</span> <span class="p">})</span> <span class="p">}</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="1424" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1424

</td>

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

</td>

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

<pre style="margin: 0;">-<span id="LC1424" 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="1425" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1425

</td>

<td class="diff-line-num new_line" data-linenumber="1493" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1493

</td>

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

<pre style="margin: 0;"> <span id="LC1493" class="line" lang="haskell"><span class="n" style="color: #333;">tcLhs</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">other_bind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"tcLhs"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">other_bind</span><span class="p">)</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="1426" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1426

</td>

<td class="diff-line-num new_line" data-linenumber="1494" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1494

</td>

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

<pre style="margin: 0;"> <span id="LC1494" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- AbsBind, VarBind impossible</span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1427" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1427

</td>

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

1495

</td>

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

<pre style="margin: 0;"> <span id="LC1495" 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="1428" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

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

1496

</td>

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

<pre style="margin: 0;">+<span id="LC1496" class="line" lang="haskell"><span class="n" style="color: #333;">lookupMBI</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">MonoBindInfo</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="1428" style="width: 35px; color: rgba(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="1497" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1497

</td>

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

<pre style="margin: 0;">+<span id="LC1497" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- After typechecking the pattern, look up the binder</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="1428" style="width: 35px; color: rgba(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="1498" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1498

</td>

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

<pre style="margin: 0;">+<span id="LC1498" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- names that lack a signature, which the pattern has brought</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="1428" style="width: 35px; color: rgba(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="1499" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1499

</td>

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

<pre style="margin: 0;">+<span id="LC1499" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- into scope.</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="1428" style="width: 35px; color: rgba(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="1500" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1500

</td>

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

<pre style="margin: 0;">+<span id="LC1500" class="line" lang="haskell"><span class="n" style="color: #333;">lookupMBI</span> <span class="n" style="color: #333;">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="1428" style="width: 35px; color: rgba(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="1501" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1501

</td>

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

<pre style="margin: 0;">+<span id="LC1501" 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;">mono_id</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcLookupId</span> <span class="n" style="color: #333;">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="1428" style="width: 35px; color: rgba(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="1502" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1502

</td>

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

<pre style="margin: 0;">+<span id="LC1502" 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;">MBI</span> <span class="p">{</span> <span class="n" style="color: #333;">mbi_poly_name</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">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="1428" style="width: 35px; color: rgba(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="1503" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1503

</td>

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

<pre style="margin: 0;">+<span id="LC1503" class="line" lang="haskell">                     <span class="p">,</span> <span class="n" style="color: #333;">mbi_sig</span>       <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</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="1428" style="width: 35px; color: rgba(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="1504" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1504

</td>

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

<pre style="margin: 0;">+<span id="LC1504" class="line" lang="haskell">                     <span class="p">,</span> <span class="n" style="color: #333;">mbi_mono_id</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mono_id</span> <span class="p">})</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="1428" style="width: 35px; color: rgba(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="1505" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1505

</td>

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

<pre style="margin: 0;">+<span id="LC1505" 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="1428" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1428

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<pre style="margin: 0;"> <span id="LC1506" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-------------------</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1507" class="line" lang="haskell"><span class="n" style="color: #333;">tcLhsSigId</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LetBndrSpec</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TcIdSigInfo</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="kt" style="color: #458; font-weight: 600;">MonoBindInfo</span></span>

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1508

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<pre style="margin: 0;"> <span id="LC1508" class="line" lang="haskell"><span class="n" style="color: #333;">tcLhsSigId</span> <span class="n" style="color: #333;">no_gen</span> <span class="p">(</span><span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">sig</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1467" style="width: 35px; color: rgba(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="1545" style="width: 35px; color: rgba(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">@@ -1467,15 +1545,9 @@ tcRhs (TcPatBind infos pat' grhss pat_ty)</td>

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<pre style="margin: 0;"> <span id="LC1545" class="line" lang="haskell">    <span class="n" style="color: #333;">tcExtendIdBinderStackForRhs</span> <span class="n" style="color: #333;">infos</span>        <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1468" style="width: 35px; color: rgba(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="LC1546" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcRhs: pat bind"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">pat'</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">pat_ty</span><span class="p">)</span></span>

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1469

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<pre style="margin: 0;"> <span id="LC1547" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">grhss'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">patMonoBindsCtxt</span> <span class="n" style="color: #333;">pat'</span> <span class="n" style="color: #333;">grhss</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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1470

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<pre style="margin: 0;">-<span id="LC1470" class="line" lang="haskell">                    <span class="n" style="color: #333;">tcScalingUsage</span> <span class="kt" style="color: #458; font-weight: 600;">Many</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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1471

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<pre style="margin: 0;">-<span id="LC1471" class="line" lang="haskell">                    <span class="c1" style="color: #998; font-style: italic;">-- Like in tcMatchesFun, this scaling happens because all</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1472" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1472

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<pre style="margin: 0;">-<span id="LC1472" class="line" lang="haskell">                    <span class="c1" style="color: #998; font-style: italic;">-- let bindings are unrestricted. A difference, here, is</span></span>

</pre>

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1473

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<pre style="margin: 0;">-<span id="LC1473" class="line" lang="haskell">                    <span class="c1" style="color: #998; font-style: italic;">-- that when this is not the case, any more, we will have to</span></span>

</pre>

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1474

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<td class="diff-line-num new_line old" data-linenumber="1548" style="width: 35px; color: rgba(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="LC1474" class="line" lang="haskell">                    <span class="c1" style="color: #998; font-style: italic;">-- make sure that the pattern is strict, otherwise this will</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1475" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1475

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<td class="diff-line-num new_line old" data-linenumber="1548" style="width: 35px; color: rgba(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="LC1475" class="line" lang="haskell">                    <span class="c1" style="color: #998; font-style: italic;">-- be desugar to incorrect code.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1476" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1476

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<pre style="margin: 0;">-<span id="LC1476" class="line" lang="haskell">                    <span class="n" style="color: #333;">tcGRHSsPat</span> <span class="n" style="color: #333;">grhss</span> <span class="n" style="color: #333;">pat_ty</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1477" style="width: 35px; color: rgba(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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1548

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<pre style="margin: 0;">+<span id="LC1548" class="line" lang="haskell">                    <span class="n" style="color: #333;">tcGRHSsPat</span> <span class="n" style="color: #333;">grhss</span> <span class="p">(</span><span class="n" style="color: #333;">mkCheckExpType</span> <span class="n" style="color: #333;">pat_ty</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1549" 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;">PatBind</span> <span class="p">{</span> <span class="n" style="color: #333;">pat_lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pat'</span><span class="p">,</span> <span class="n" style="color: #333;">pat_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss'</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1478" class="line" lang="haskell">                           <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NPatBindTc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">emptyNameSet</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">pat_ty</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1550" class="line" lang="haskell">                           <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pat_ty</span></span>

</pre>

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1479

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1551

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<pre style="margin: 0;"> <span id="LC1551" class="line" lang="haskell">                           <span class="p">,</span> <span class="n" style="color: #333;">pat_ticks</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="p">}</span> <span class="p">)}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1480" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1480

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1552

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<pre style="margin: 0;"> <span id="LC1552" class="line" lang="haskell"></span>

</pre>

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1481

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1553

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<pre style="margin: 0;"> <span id="LC1553" class="line" lang="haskell"><span class="n" style="color: #333;">tcExtendTyVarEnvForRhs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">TcIdSigInst</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</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;">TcM</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<br>

</li>

<li id="3377164bfe9a1f1a8cfd588703ae1e0ea1e91cf9">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#3377164bfe9a1f1a8cfd588703ae1e0ea1e91cf9"><strong>compiler/GHC/Tc/Gen/Match.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="157" style="width: 35px; color: rgba(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="157" style="width: 35px; color: rgba(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">@@ -157,10 +157,17 @@ tcMatchLambda herald match_ctxt match res_ty</td>

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157

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157

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<pre style="margin: 0;"> <span id="LC157" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC158" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- @tcGRHSsPat@ typechecks @[GRHSs]@ that occur in a @PatMonoBind@.</span></span>

</pre>

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159

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<pre style="margin: 0;"> <span id="LC159" class="line" lang="haskell"></span>

</pre>

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160

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<pre style="margin: 0;">-<span id="LC160" class="line" lang="haskell"><span class="n" style="color: #333;">tcGRHSsPat</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">GRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="p">(</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="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Tc</span>RhoType</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC160" class="line" lang="haskell"><span class="n" style="color: #333;">tcGRHSsPat</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">GRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="p">(</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="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Exp</span>RhoType</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC161" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC162" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Used for pattern bindings</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC163" class="line" lang="haskell"><span class="n" style="color: #333;">tcGRHSsPat</span> <span class="n" style="color: #333;">grhss</span> <span class="n" style="color: #333;">res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcGRHSs</span> <span class="n" style="color: #333;">match_ctxt</span> <span class="n" style="color: #333;">grhss</span> <span class="p">(</span><span class="n" style="color: #333;">mkCheckExpType</span> <span class="n" style="color: #333;">res_ty</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC163" class="line" lang="haskell"><span class="n" style="color: #333;">tcGRHSsPat</span> <span class="n" style="color: #333;">grhss</span> <span class="n" style="color: #333;">res_ty</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC164" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcScalingUsage</span> <span class="kt" style="color: #458; font-weight: 600;">Many</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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

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<pre style="margin: 0;">+<span id="LC165" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- Like in tcMatchesFun, this scaling happens because all</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC166" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- let bindings are unrestricted. A difference, here, is</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC167" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- that when this is not the case, any more, we will have to</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC168" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- make sure that the pattern is strict, otherwise this will</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="164" style="width: 35px; color: rgba(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="169" style="width: 35px; color: rgba(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="LC169" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- desugar to incorrect code.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell">    <span class="n" style="color: #333;">tcGRHSs</span> <span class="n" style="color: #333;">match_ctxt</span> <span class="n" style="color: #333;">grhss</span> <span class="n" style="color: #333;">res_ty</span></span>

</pre>

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164

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171

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<pre style="margin: 0;"> <span id="LC171" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="165" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

165

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<pre style="margin: 0;"> <span id="LC172" class="line" lang="haskell">    <span class="n" style="color: #333;">match_ctxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MC</span> <span class="p">{</span> <span class="n" style="color: #333;">mc_what</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PatBindRhs</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC173" class="line" lang="haskell">                      <span class="n" style="color: #333;">mc_body</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcBody</span> <span class="p">}</span></span>

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<br>

</li>

<li id="b28f2a9a42f420338f6ed7df6d45db22d24f195b">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#b28f2a9a42f420338f6ed7df6d45db22d24f195b"><strong>compiler/GHC/Tc/Gen/Match.hs-boot</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2" style="width: 35px; color: rgba(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="2" style="width: 35px; color: rgba(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">@@ -2,13 +2,13 @@ module GHC.Tc.Gen.Match where</td>

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2

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<pre style="margin: 0;"> <span id="LC2" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Hs</span>           <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">GRHSs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MatchGroup</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="p">)</span></span>

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3

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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Types.Evidence</span>  <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">HsWrapper</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Name</span>   <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="p">)</span></span>

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5

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<td class="diff-line-num new_line old" data-linenumber="5" style="width: 35px; color: rgba(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="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.TcType</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">ExpSigmaType</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Tc</span>RhoType</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="5" style="width: 35px; color: rgba(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="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.TcType</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">ExpSigmaType</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Exp</span>RhoType</span> <span class="p">)</span></span>

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6

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Types</span>     <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

7

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<td class="diff-line-num new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

7

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<pre style="margin: 0;"> <span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.SrcLoc</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

8

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<td class="diff-line-num new_line" data-linenumber="8" style="width: 35px; color: rgba(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="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Hs.Extension</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_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">

9

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<td class="diff-line-num 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">

9

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

10

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="n" style="color: #333;">tcGRHSsPat</span>    <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">GRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="p">(</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="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC11" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Tc</span>RhoType</span></span>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">Exp</span>RhoType</span></span>

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"><span class="n" style="color: #333;">tcMatchesFun</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span></span>

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<br>

</li>

<li id="6a120b0673f8920127d8fffdaa16f01b90cc92d7">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#6a120b0673f8920127d8fffdaa16f01b90cc92d7"><strong>compiler/GHC/Tc/Utils/Zonk.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -533,12 +533,12 @@ zonk_lbind env = wrapLocM (zonk_bind env)</td>

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<pre style="margin: 0;"> <span id="LC533" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC534" class="line" lang="haskell"><span class="n" style="color: #333;">zonk_bind</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ZonkEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HsBind</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsBind</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC535" class="line" lang="haskell"><span class="n" style="color: #333;">zonk_bind</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">bind</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatBind</span> <span class="p">{</span> <span class="n" style="color: #333;">pat_lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pat</span><span class="p">,</span> <span class="n" style="color: #333;">pat_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">grhss</span></span>

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<pre style="margin: 0;">-<span id="LC536" class="line" lang="haskell">                            <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NPatBindTc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fvs</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="LC536" class="line" lang="haskell">                            <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ty</span><span class="p">})</span></span>

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537

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537

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<pre style="margin: 0;"> <span id="LC537" 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;">_env</span><span class="p">,</span> <span class="n" style="color: #333;">new_pat</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkPat</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">pat</span>            <span class="c1" style="color: #998; font-style: italic;">-- Env already extended</span></span>

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<td class="diff-line-num old_line" data-linenumber="538" style="width: 35px; color: rgba(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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538

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<pre style="margin: 0;"> <span id="LC538" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">new_grhss</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkGRHSs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">zonkLExpr</span> <span class="n" style="color: #333;">grhss</span></span>

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539

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<pre style="margin: 0;"> <span id="LC539" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">new_ty</span>    <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcTypeToTypeX</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">ty</span></span>

</pre>

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540

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<pre style="margin: 0;"> <span id="LC540" 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;">bind</span> <span class="p">{</span> <span class="n" style="color: #333;">pat_lhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_pat</span><span class="p">,</span> <span class="n" style="color: #333;">pat_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_grhss</span></span>

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541

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<pre style="margin: 0;">-<span id="LC541" class="line" lang="haskell">                       <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NPatBindTc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fvs</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">new_ty</span> <span class="p">})</span> <span class="p">}</span></span>

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<pre style="margin: 0;">+<span id="LC541" class="line" lang="haskell">                       <span class="p">,</span> <span class="n" style="color: #333;">pat_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_ty</span> <span class="p">})</span> <span class="p">}</span></span>

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542

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542

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<pre style="margin: 0;"> <span id="LC542" class="line" lang="haskell"></span>

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543

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<pre style="margin: 0;"> <span id="LC543" class="line" lang="haskell"><span class="n" style="color: #333;">zonk_bind</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VarBind</span> <span class="p">{</span> <span class="n" style="color: #333;">var_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span></span>

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544

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<pre style="margin: 0;"> <span id="LC544" class="line" lang="haskell">                       <span class="p">,</span> <span class="n" style="color: #333;">var_id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">var</span><span class="p">,</span> <span class="n" style="color: #333;">var_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">expr</span> <span class="p">})</span></span>

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<br>

</li>

<li id="84db639cfe8dd70e30a3ffcf189d3928af34b9c7">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#84db639cfe8dd70e30a3ffcf189d3928af34b9c7"><strong>testsuite/tests/typecheck/should_compile/T18323.hs</strong></a>

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1

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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 ImpredicativeTypes #-}</span></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Tests SPECIAL CASE 2 in GHC.Tc.Gen.Bind.tcMonoBinds</span></span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Special case for non-recursive pattern bindings]</span></span>

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5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Doesn't have any useful effect until we have</span></span>

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7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ImpredicativeTypes, but does no harm either</span></span>

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8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T18323</span> <span class="kr" style="font-weight: 600;">where</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="n" style="color: #333;">ids</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</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;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span><span class="p">]</span></span>

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12

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="n" style="color: #333;">ids</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="n" style="color: #333;">id</span><span class="p">]</span></span>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="n" style="color: #333;">combine</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</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="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="p">[</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;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span><span class="p">]</span></span>

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="p">((</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="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span><span class="p">),</span> <span class="p">[</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;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span><span class="p">])</span></span>

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17

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="n" style="color: #333;">combine</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">,</span><span class="n" style="color: #333;">y</span><span class="p">)</span></span>

</pre>

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18

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This works</span></span>

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="n" style="color: #333;">works</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">combine</span> <span class="n" style="color: #333;">head</span> <span class="n" style="color: #333;">ids</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">in</span> <span class="p">(</span><span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">t</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">snd</span> <span class="n" style="color: #333;">t</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- But this does not typecheck, and it could</span></span>

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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="n" style="color: #333;">breaks</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">,</span><span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">combine</span> <span class="n" style="color: #333;">head</span> <span class="n" style="color: #333;">ids</span></span>

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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell">         <span class="kr" style="font-weight: 600;">in</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

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26

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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- And nor does this, but it could too</span></span>

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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"><span class="n" style="color: #333;">breaks2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">t</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">combine</span> <span class="n" style="color: #333;">head</span> <span class="n" style="color: #333;">ids</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell">          <span class="kr" style="font-weight: 600;">in</span> <span class="p">(</span><span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">t</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">snd</span> <span class="n" style="color: #333;">t</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span></pre>

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</li>

<li id="34fe7bf0e6fbf60effb28393399ba68666593909">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#34fe7bf0e6fbf60effb28393399ba68666593909"><strong>testsuite/tests/typecheck/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">@@ -720,3 +720,5 @@ test('T17775-viewpats-d', normal, compile_fail, [''])</td>

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<pre style="margin: 0;"> <span id="LC720" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18118</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">multimod_compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">T18118</span><span class="p">',</span> <span class="p">'</span><span class="s1" style="color: #d14;">-v0</span><span class="p">'])</span></span>

</pre>

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721

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721

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<pre style="margin: 0;"> <span id="LC721" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18412</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="722" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

722

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722

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<pre style="margin: 0;"> <span id="LC722" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18470</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="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">

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<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="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18323</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="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">

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<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="perl"></span></pre>

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<br>

</li>

<li id="2d39b93f115a9e0a15702aaad1c45608b03bb12d">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#2d39b93f115a9e0a15702aaad1c45608b03bb12d"><strong>testsuite/tests/typecheck/should_fail/T8570.stderr</strong></a>

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1

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

1

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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2

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<td class="diff-line-num new_line old" data-linenumber="2" style="width: 35px; color: rgba(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="LC2" class="line" lang="plaintext">T8570.hs:6:18:</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3

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<td class="diff-line-num new_line old" data-linenumber="2" style="width: 35px; color: rgba(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="LC3" class="line" lang="plaintext">    Constructor ‘Image’ does not have field ‘filepath’</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4

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<td class="diff-line-num new_line old" data-linenumber="2" style="width: 35px; color: rgba(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="LC4" class="line" lang="plaintext">    In the pattern: Image {filepath = x}</span>

</pre>

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

5

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<td class="diff-line-num new_line old" data-linenumber="2" style="width: 35px; color: rgba(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="LC5" class="line" lang="plaintext">    In a pattern binding: Image {filepath = x} = logo</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

6

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<pre style="margin: 0;">-<span id="LC6" class="line" lang="plaintext">    In the expression: let Image {filepath = x} = logo in x</span></pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(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="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">

2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T8570.hs:6:11: error:</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(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="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Couldn't match expected type ‘Image’ with actual type ‘Field’</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(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="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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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="LC4" class="line" lang="plaintext">    • In the pattern: Image {filepath = x}</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(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="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

5

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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="LC5" class="line" lang="plaintext">      In a pattern binding: Image {filepath = x} = logo</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(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="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

6

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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="LC6" class="line" lang="plaintext">      In the expression: let Image {filepath = x} = logo in x</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(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="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(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="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

8

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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="LC8" class="line" lang="plaintext">T8570.hs:6:18: error:</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(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="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

9

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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="LC9" class="line" lang="plaintext">    • Constructor ‘Image’ does not have field ‘filepath’</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(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="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

10

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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="LC10" class="line" lang="plaintext">    • In the pattern: Image {filepath = x}</span>

</pre>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext">      In a pattern binding: Image {filepath = x} = logo</span>

</pre>

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="plaintext">      In the expression: let Image {filepath = x} = logo in x</span></pre>

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<br>

</li>

<li id="1c8d7b6a16fb7869940093e489cb1b646193ee97">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#1c8d7b6a16fb7869940093e489cb1b646193ee97"><strong>testsuite/tests/typecheck/should_fail/tcfail004.stderr</strong></a>

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1

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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC2" class="line" lang="plaintext">tcfail004.hs:3:<span class="idiff left right">9</span>: error:</span>

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">    • Couldn't match expected type: (a<span class="idiff left right">, b</span>)</span>

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<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">                  with actual type: (a<span class="idiff left right">0, b0, c0</span>)</span>

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<pre style="margin: 0;">-<span id="LC5" class="line" lang="plaintext">    • In the <span class="idiff left right">expression: (1, 2, 3</span>)</span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">tcfail004.hs:3:<span class="idiff left right">1</span>: error:</span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Couldn't match expected type: (a<span class="idiff left right">0, b0, c0</span>)</span>

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4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">                  with actual type: (a<span class="idiff left right">, b</span>)</span>

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5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">    • In the <span class="idiff left right">pattern: (f, g</span>)</span>

</pre>

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="plaintext">      In a pattern binding: (f, g) = (1, 2, 3)</span></pre>

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<pre style="margin: 0;">-<span id="LC7" class="line" lang="plaintext">    • Relevant bindings include</span>

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<pre style="margin: 0;">-<span id="LC8" class="line" lang="plaintext">        f :: a (bound at tcfail004.hs:3:2)</span>

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9

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<pre style="margin: 0;">-<span id="LC9" class="line" lang="plaintext">        g :: b (bound at tcfail004.hs:3:4)</span></pre>

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<br>

</li>

<li id="376d5b6b4c545329c0c56dec7a169a896c093b98">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#376d5b6b4c545329c0c56dec7a169a896c093b98"><strong>testsuite/tests/typecheck/should_fail/tcfail005.stderr</strong></a>

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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC2" class="line" lang="plaintext">tcfail005.hs:3:<span class="idiff left right">9</span>: error:</span>

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">    • Couldn't match expected type: <span class="idiff left right">[a]</span></span>

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<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">                  with actual type: <span class="idiff left right">(a0, Char)</span></span>

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<pre style="margin: 0;">-<span id="LC5" class="line" lang="plaintext">    • In the <span class="idiff left right">expression: (1, 'a')</span></span>

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<td class="diff-line-num new new_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">

2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">tcfail005.hs:3:<span class="idiff left right">2</span>: error:</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="6" style="width: 35px; color: rgba(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="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Couldn't match expected type: <span class="idiff left right">(a0, Char)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="6" style="width: 35px; color: rgba(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="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">                  with actual type: <span class="idiff left right">[a]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="6" style="width: 35px; color: rgba(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="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">    • In the <span class="idiff left right">pattern: h : i</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

6

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<td class="diff-line-num new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

6

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="plaintext">      In a pattern binding: (h : i) = (1, 'a')</span></pre>

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7

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<td class="diff-line-num new_line old" data-linenumber="7" style="width: 35px; color: rgba(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="LC7" class="line" lang="plaintext">    • Relevant bindings include</span>

</pre>

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8

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<td class="diff-line-num new_line old" data-linenumber="7" style="width: 35px; color: rgba(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="LC8" class="line" lang="plaintext">        h :: a (bound at tcfail005.hs:3:2)</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

9

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<td class="diff-line-num new_line old" data-linenumber="7" style="width: 35px; color: rgba(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="LC9" class="line" lang="plaintext">        i :: [a] (bound at tcfail005.hs:3:4)</span></pre>

</td>

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<br>

</li>

<li id="f9cc9e584e23c3c84a116f84baa271441097be15">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#f9cc9e584e23c3c84a116f84baa271441097be15"><strong>testsuite/tests/typecheck/should_fail/tcfail012.stderr</strong></a>

<hr>

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

1

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

1

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

<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2

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<td class="diff-line-num new_line old" data-linenumber="2" style="width: 35px; color: rgba(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="LC2" class="line" lang="plaintext">tcfail012.hs:3:<span class="idiff left right">8</span>: error:</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">    • Couldn't match expected type ‘<span class="idiff left right">Bool’ with actual type ‘[a0]</span>’</span>

</pre>

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4

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<td class="diff-line-num new_line old" data-linenumber="2" style="width: 35px; color: rgba(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="LC4" class="line" lang="plaintext">    • In the <span class="idiff left right">expression: []</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="5" style="width: 35px; color: rgba(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="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">

2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">tcfail012.hs:3:<span class="idiff left right">1</span>: error:</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="5" style="width: 35px; color: rgba(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="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Couldn't match expected type ‘<span class="idiff left right">[a0]’ with actual type ‘Bool</span>’</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="5" style="width: 35px; color: rgba(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="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">    • In the <span class="idiff left right">pattern: True</span></span>

</pre>

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

5

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

5

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<pre style="margin: 0;"> <span id="LC5" class="line" lang="plaintext">      In a pattern binding: True = []</span></pre>

</td>

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</table>

<br>

</li>

<li id="c78abed5d33b2a4e1d37e3fb40f816c68920929b">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eb9bdaef6024558696e1e50b12d7fefb70483a9f#c78abed5d33b2a4e1d37e3fb40f816c68920929b"><strong>testsuite/tests/warnings/should_fail/CaretDiagnostics1.stderr</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 unfold js-unfold old_line" data-linenumber="59" style="width: 35px; color: rgba(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="59" style="width: 35px; color: rgba(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">@@ -59,7 +59,7 @@ CaretDiagnostics1.hs:13:7-11: error:</td>

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59

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<td class="diff-line-num new_line" data-linenumber="59" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

59

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<pre style="margin: 0;"> <span id="LC59" class="line" lang="plaintext">   |       ^^^^^</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="60" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

60

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<td class="diff-line-num new_line" data-linenumber="60" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

60

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<pre style="margin: 0;"> <span id="LC60" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="61" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

61

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<td class="diff-line-num new_line" data-linenumber="61" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

61

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<pre style="margin: 0;"> <span id="LC61" class="line" lang="plaintext">CaretDiagnostics1.hs:(13,16)-(14,13): error:</span>

</pre>

</td>

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62

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<pre style="margin: 0;">-<span id="LC62" class="line" lang="plaintext">    • Couldn't match expected type ‘Char -> <span class="idiff left right">p</span>0’ with actual type ‘()’</span>

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62

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<pre style="margin: 0;">+<span id="LC62" class="line" lang="plaintext">    • Couldn't match expected type ‘Char -> <span class="idiff left right">t</span>0’ with actual type ‘()’</span>

</pre>

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63

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63

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<pre style="margin: 0;"> <span id="LC63" class="line" lang="plaintext">    • The function ‘()’ is applied to one value argument,</span>

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64

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<pre style="margin: 0;"> <span id="LC64" class="line" lang="plaintext">        but its type ‘()’ has none</span>

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<td class="diff-line-num old_line" data-linenumber="65" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

65

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65

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<pre style="margin: 0;"> <span id="LC65" class="line" lang="plaintext">      In the expression: () '0'</span>

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