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<h3>
Adam Gundry pushed to branch wip/amg/renamer-refactor
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7542d353f8892482b76966a43432837719621f00">7542d353</a></strong>
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<span>by Adam Gundry</span>
<i>at 2020-12-02T22:55:54+00:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Simplify IncorrectParent
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/913a5076f54face20f249a224599ba7a1f50fbcd">913a5076</a></strong>
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<span>by Adam Gundry</span>
<i>at 2020-12-02T22:55:54+00:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Clean up now that #18452 is fixed
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<h4>3 changed files:</h4>
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<a href="#86d694037d496c511e28b2c09c8410f67dc19596">
compiler/GHC/Rename/Env.hs
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<a href="#73cf7ada7d008f315e18676ed83f3a566fbbe679">
compiler/GHC/Tc/Gen/Export.hs
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<li class="file-stats">
<a href="#36920f1fa315563c590243b1b096096bc305ca70">
compiler/GHC/Tc/Gen/Head.hs
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<h4>Changes:</h4>
<li id="86d694037d496c511e28b2c09c8410f67dc19596">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/655acd4deacffc5432d9b6615ff30cb9c6bc9f33...913a5076f54face20f249a224599ba7a1f50fbcd#86d694037d496c511e28b2c09c8410f67dc19596"><strong>compiler/GHC/Rename/Env.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">@@ -644,14 +644,13 @@ lookupSubBndrOcc_helper must_have_parent warn_if_deprec parent rdr_name</td>
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<pre style="margin: 0;"> <span id="LC644" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">original_gres</span> <span class="kr" style="font-weight: 600;">of</span></span>
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645
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<pre style="margin: 0;"> <span id="LC645" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">NameNotFound</span></span>
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646
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<pre style="margin: 0;"> <span id="LC646" class="line" lang="haskell"> <span class="p">[</span><span class="n" style="color: #333;">g</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">IncorrectParent</span> <span class="n" style="color: #333;">parent</span></span>
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647
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<pre style="margin: 0;">-<span id="LC647" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">gre_<span class="idiff left">name</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">g</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">ppr</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">gre_name</span></span> <span class="n" style="color: #333;">g</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC647" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">gre_<span class="idiff left right">child</span></span> <span class="n" style="color: #333;">g</span><span class="p">)</span></span>
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648
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<pre style="margin: 0;"> <span id="LC648" class="line" lang="haskell"> <span class="p">[</span><span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;"><-</span> <span class="p">[</span><span class="n" style="color: #333;">getParent</span> <span class="n" style="color: #333;">g</span><span class="p">]]</span></span>
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649
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<pre style="margin: 0;"> <span id="LC649" class="line" lang="haskell"> <span class="n" style="color: #333;">gss</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">g</span><span class="o" style="font-weight: 600;">:</span><span class="kr" style="font-weight: 600;">_</span><span class="o" style="font-weight: 600;">:</span><span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;"> <span id="LC650" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">all</span> <span class="n" style="color: #333;">isRecFldGRE</span> <span class="n" style="color: #333;">gss</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">overload_ok</span></span>
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<pre style="margin: 0;"> <span id="LC651" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;"> <span id="LC652" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IncorrectParent</span> <span class="n" style="color: #333;">parent</span></span>
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<pre style="margin: 0;">-<span id="LC653" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">gre_name</span> <span class="n" style="color: #333;">g</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC654" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">expectJust</span> <span class="s" style="color: #d14;">"noMatchingParentErr"</span> <span class="p">(</span><span class="n" style="color: #333;">greLabel</span> <span class="n" style="color: #333;">g</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC653" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">gre_child</span> <span class="n" style="color: #333;">g</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC654" class="line" lang="haskell"> <span class="p">[</span><span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">gss</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;"><-</span> <span class="p">[</span><span class="n" style="color: #333;">getParent</span> <span class="n" style="color: #333;">x</span><span class="p">]]</span></span>
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<pre style="margin: 0;"> <span id="LC655" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">mkNameClashErr</span> <span class="n" style="color: #333;">gss</span></span>
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<pre style="margin: 0;"> <span id="LC656" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -731,8 +730,7 @@ instance Monoid DisambigInfo where</td>
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<pre style="margin: 0;"> <span id="LC730" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">ChildLookupResult</span></span>
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<pre style="margin: 0;"> <span id="LC731" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NameNotFound</span> <span class="c1" style="color: #998; font-style: italic;">-- We couldn't find a suitable name</span></span>
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<pre style="margin: 0;"> <span id="LC732" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">IncorrectParent</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="c1" style="color: #998; font-style: italic;">-- Parent</span></span>
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<pre style="margin: 0;">-<span id="LC734" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="c1" style="color: #998; font-style: italic;">-- Name of thing we were looking for</span></span>
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<pre style="margin: 0;">-<span id="LC735" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span> <span class="c1" style="color: #998; font-style: italic;">-- How to print the name</span></span>
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<pre style="margin: 0;">+<span id="LC733" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Child</span> <span class="c1" style="color: #998; font-style: italic;">-- Child we were looking for</span></span>
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<pre style="margin: 0;"> <span id="LC734" class="line" lang="haskell"> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- List of possible parents</span></span>
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<pre style="margin: 0;"> <span id="LC735" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">FoundChild</span> <span class="kt" style="color: #458; font-weight: 600;">Parent</span> <span class="kt" style="color: #458; font-weight: 600;">Child</span> <span class="c1" style="color: #998; font-style: italic;">-- We resolved to a child</span></span>
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<pre style="margin: 0;"> <span id="LC736" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -748,8 +746,8 @@ combineChildLookupResult (x:xs) = do</td>
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<pre style="margin: 0;"> <span id="LC746" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">ChildLookupResult</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC747" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="kt" style="color: #458; font-weight: 600;">NameNotFound</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"NameNotFound"</span></span>
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<pre style="margin: 0;"> <span id="LC748" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">FoundChild</span> <span class="n" style="color: #333;">p</span> <span class="n" style="color: #333;">n</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Found:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">n</span></span>
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<pre style="margin: 0;">-<span id="LC751" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IncorrectParent</span> <span class="n" style="color: #333;">p</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;"><span class="idiff left">td</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">ns</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"IncorrectParent"</span></span>
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<pre style="margin: 0;">-<span id="LC752" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">hsep</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">p</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">n</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left">td</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ns</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC749" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IncorrectParent</span> <span class="n" style="color: #333;">p</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">ns</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"IncorrectParent"</span></span>
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<pre style="margin: 0;">+<span id="LC750" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">hsep</span> <span class="p">[</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">p</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">n</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ns</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC751" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC752" class="line" lang="haskell"><span class="n" style="color: #333;">lookupSubBndrOcc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;"> <span id="LC753" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="c1" style="color: #998; font-style: italic;">-- Parent</span></span>
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<li id="73cf7ada7d008f315e18676ed83f3a566fbbe679">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/655acd4deacffc5432d9b6615ff30cb9c6bc9f33...913a5076f54face20f249a224599ba7a1f50fbcd#73cf7ada7d008f315e18676ed83f3a566fbbe679"><strong>compiler/GHC/Tc/Gen/Export.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">@@ -525,7 +525,7 @@ lookupChildrenExport spec_parent rdr_items =</td>
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<pre style="margin: 0;"> <span id="LC525" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ChildField</span> <span class="n" style="color: #333;">fl</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="kt" style="color: #458; font-weight: 600;">L</span> <span class="p">(</span><span class="n" style="color: #333;">getLoc</span> <span class="n" style="color: #333;">n</span><span class="p">)</span> <span class="n" style="color: #333;">fl</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC526" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ChildName</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Left</span> <span class="p">(</span><span class="n" style="color: #333;">replaceLWrappedName</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">name</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC527" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC528" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IncorrectParent</span> <span class="n" style="color: #333;">p</span> <span class="n" style="color: #333;"><span class="idiff left">g</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">td</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">gs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">failWithDcErr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">p</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">g</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">td</span></span> <span class="n" style="color: #333;">gs</span></span>
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<pre style="margin: 0;">+<span id="LC528" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IncorrectParent</span> <span class="n" style="color: #333;">p</span> <span class="n" style="color: #333;"><span class="idiff left">c</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">gs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">failWithDcErr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">p</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">c</span></span> <span class="n" style="color: #333;">gs</span></span>
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<pre style="margin: 0;"> <span id="LC529" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC530" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC531" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note: [Typing Pattern Synonym Exports]</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -613,7 +613,7 @@ checkPatSynParent parent NoParent child</td>
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<pre style="margin: 0;"> <span id="LC613" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC614" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">AConLike</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatSynCon</span> <span class="n" style="color: #333;">p</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">handle_pat_syn</span> <span class="p">(</span><span class="n" style="color: #333;">psErr</span> <span class="n" style="color: #333;">p</span><span class="p">)</span> <span class="n" style="color: #333;">parent_ty_con</span> <span class="n" style="color: #333;">p</span></span>
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<pre style="margin: 0;"> <span id="LC615" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC616" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">failWithDcErr</span> <span class="n" style="color: #333;">parent</span> <span class="n" style="color: #333;"><span class="idiff left">mpat_syn</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">child</span></span><span class="p"><span class="idiff right">)</span></span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC616" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">failWithDcErr</span> <span class="n" style="color: #333;">parent</span> <span class="n" style="color: #333;"><span class="idiff left right">child</span></span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC617" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC618" class="line" lang="haskell"> <span class="n" style="color: #333;">psErr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exportErrCtxt</span> <span class="s" style="color: #d14;">"pattern synonym"</span></span>
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<pre style="margin: 0;"> <span id="LC619" class="line" lang="haskell"> <span class="n" style="color: #333;">selErr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exportErrCtxt</span> <span class="s" style="color: #d14;">"pattern synonym record selector"</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -805,11 +805,11 @@ dcErrMsg ty_con what_is thing parents =</td>
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<pre style="margin: 0;"> <span id="LC805" class="line" lang="haskell"> <span class="p">[</span><span class="kr" style="font-weight: 600;">_</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Parent:"</span></span>
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806
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<pre style="margin: 0;"> <span id="LC806" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Parents:"</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">fsep</span> <span class="p">(</span><span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">comma</span> <span class="n" style="color: #333;">parents</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC807" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC808" class="line" lang="haskell"><span class="n" style="color: #333;">failWithDcErr</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;"><span class="idiff left">Name</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">SDoc</span></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="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>
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<pre style="margin: 0;">-<span id="LC809" class="line" lang="haskell"><span class="n" style="color: #333;">failWithDcErr</span> <span class="n" style="color: #333;">parent</span> <span class="n" style="color: #333;"><span class="idiff left">thing</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">thing_doc</span></span> <span class="n" style="color: #333;">parents</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">-<span id="LC810" class="line" lang="haskell"> <span class="n" style="color: #333;">ty_thing</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcLookupGlobal</span> <span class="n" style="color: #333;"><span class="idiff left right">thing</span></span></span>
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<pre style="margin: 0;">+<span id="LC808" class="line" lang="haskell"><span class="n" style="color: #333;">failWithDcErr</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;"><span class="idiff left right">Child</span></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="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>
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<pre style="margin: 0;">+<span id="LC809" class="line" lang="haskell"><span class="n" style="color: #333;">failWithDcErr</span> <span class="n" style="color: #333;">parent</span> <span class="n" style="color: #333;"><span class="idiff left right">child</span></span> <span class="n" style="color: #333;">parents</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC810" class="line" lang="haskell"> <span class="n" style="color: #333;">ty_thing</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcLookupGlobal</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">childName</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">child</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;"> <span id="LC811" class="line" lang="haskell"> <span class="n" style="color: #333;">failWithTc</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">dcErrMsg</span> <span class="n" style="color: #333;">parent</span> <span class="p">(</span><span class="n" style="color: #333;">tyThingCategory'</span> <span class="n" style="color: #333;">ty_thing</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC812" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">thing_doc</span></span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">parents</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC812" class="line" lang="haskell"> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">child</span></span><span class="p"><span class="idiff right">)</span></span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">parents</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC813" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC814" class="line" lang="haskell"> <span class="n" style="color: #333;">tyThingCategory'</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyThing</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>
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<pre style="margin: 0;"> <span id="LC815" class="line" lang="haskell"> <span class="n" style="color: #333;">tyThingCategory'</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">AnId</span> <span class="n" style="color: #333;">i</span><span class="p">)</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/655acd4deacffc5432d9b6615ff30cb9c6bc9f33...913a5076f54face20f249a224599ba7a1f50fbcd#36920f1fa315563c590243b1b096096bc305ca70"><strong>compiler/GHC/Tc/Gen/Head.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">@@ -493,11 +493,12 @@ tc_rec_sel_id lbl sel_name</td>
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<pre style="margin: 0;"> <span id="LC493" 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;">thing</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcLookup</span> <span class="n" style="color: #333;">sel_name</span></span>
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<pre style="margin: 0;"> <span id="LC494" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">thing</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC495" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ATcId</span> <span class="p">{</span> <span class="n" style="color: #333;">tct_id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">id</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC496" 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;">check_local_id</span> <span class="n" style="color: #333;">occ</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">+<span id="LC496" 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;">check_naughty</span> <span class="n" style="color: #333;">occ</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">+<span id="LC497" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">check_local_id</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;"> <span id="LC498" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">id</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC499" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC500" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">AGlobal</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">AnId</span> <span class="n" style="color: #333;">id</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC500" 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;">check_<span class="idiff left right">global_id</span></span> <span class="n" style="color: #333;">occ</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">+<span id="LC501" 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;">check_<span class="idiff left right">naughty</span></span> <span class="n" style="color: #333;">occ</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;"> <span id="LC502" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">id</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC503" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- A global cannot possibly be ill-staged</span></span>
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<pre style="margin: 0;"> <span id="LC504" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- nor does it need the 'lifting' treatment</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -758,12 +759,14 @@ tc_infer_id id_name</td>
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<pre style="margin: 0;"> <span id="LC759" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">global_env</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getGlobalRdrEnv</span></span>
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<pre style="margin: 0;"> <span id="LC760" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">thing</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC761" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ATcId</span> <span class="p">{</span> <span class="n" style="color: #333;">tct_id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">id</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC761" 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;">check_local_id</span> <span class="n" style="color: #333;"><span class="idiff left">occ</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">+<span id="LC762" 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;">check_local_id</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;"> <span id="LC763" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return_id</span> <span class="n" style="color: #333;">id</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC764" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC765" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">AGlobal</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">AnId</span> <span class="n" style="color: #333;">id</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC765" 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;">check_global_id</span> <span class="n" style="color: #333;">occ</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">-<span id="LC766" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return_id</span> <span class="n" style="color: #333;">id</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC766" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return_id</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">+<span id="LC767" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- A global cannot possibly be ill-staged</span></span>
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<pre style="margin: 0;">+<span id="LC768" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- nor does it need the 'lifting' treatment</span></span>
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<pre style="margin: 0;">+<span id="LC769" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Hence no checkTh stuff here</span></span>
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<pre style="margin: 0;"> <span id="LC770" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC771" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">AGlobal</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">AConLike</span> <span class="n" style="color: #333;">cl</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">cl</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC772" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">con</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return_data_con</span> <span class="n" style="color: #333;">con</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -798,8 +801,6 @@ tc_infer_id id_name</td>
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<pre style="margin: 0;"> <span id="LC801" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Illegal term-level use of the type constructor"</span></span>
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802
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<pre style="margin: 0;"> <span id="LC802" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">tyConName</span> <span class="n" style="color: #333;">ty_con</span><span class="p">))</span></span>
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803
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<pre style="margin: 0;"> <span id="LC803" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC801" class="line" lang="haskell"> <span class="n" style="color: #333;">occ</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nameOccName</span> <span class="n" style="color: #333;">id_name</span></span>
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<pre style="margin: 0;">-<span id="LC802" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC804" class="line" lang="haskell"> <span class="n" style="color: #333;">return_id</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsVar</span> <span class="n" style="color: #333;">noExtField</span> <span class="p">(</span><span class="n" style="color: #333;">noLoc</span> <span class="n" style="color: #333;">id</span><span class="p">),</span> <span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">id</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC805" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC806" class="line" lang="haskell"> <span class="n" style="color: #333;">return_data_con</span> <span class="n" style="color: #333;">con</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -845,19 +846,11 @@ tc_infer_id id_name</td>
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<pre style="margin: 0;"> <span id="LC846" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkInvisForAllTys</span> <span class="n" style="color: #333;">tvs</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkInvisFunTysMany</span> <span class="n" style="color: #333;">theta</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkVisFunTys</span> <span class="n" style="color: #333;">scaled_arg_tys</span> <span class="n" style="color: #333;">res</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC847" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC848" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC848" class="line" lang="haskell"><span class="n" style="color: #333;">check_local_id</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccName</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">-<span id="LC849" class="line" lang="haskell"><span class="n" style="color: #333;">check_local_id</span> <span class="n" style="color: #333;">occ</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">-<span id="LC850" 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;">check_naughty</span> <span class="n" style="color: #333;">occ</span> <span class="n" style="color: #333;">id</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [HsVar: naughty record selectors]</span></span>
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<pre style="margin: 0;">-<span id="LC851" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">checkThLocalId</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">+<span id="LC849" class="line" lang="haskell"><span class="n" style="color: #333;">check_local_id</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC850" class="line" lang="haskell"><span class="n" style="color: #333;">check_local_id</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;">+<span id="LC851" 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;">checkThLocalId</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;"> <span id="LC852" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tcEmitBindingUsage</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">unitUE</span> <span class="p">(</span><span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">id</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">One</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC853" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC854" class="line" lang="haskell"><span class="n" style="color: #333;">check_global_id</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccName</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">-<span id="LC855" class="line" lang="haskell"><span class="n" style="color: #333;">check_global_id</span> <span class="n" style="color: #333;">occ</span> <span class="n" style="color: #333;">id</span></span>
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856
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<pre style="margin: 0;">-<span id="LC856" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">check_naughty</span> <span class="n" style="color: #333;">occ</span> <span class="n" style="color: #333;">id</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [HsVar: naughty record selectors]</span></span>
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857
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<pre style="margin: 0;">-<span id="LC857" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- A global cannot possibly be ill-staged</span></span>
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858
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<pre style="margin: 0;">-<span id="LC858" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- nor does it need the 'lifting' treatment</span></span>
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<pre style="margin: 0;">-<span id="LC859" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Hence no checkTh stuff here</span></span>
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<pre style="margin: 0;">-<span id="LC860" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC854" class="line" lang="haskell"><span class="n" style="color: #333;">check_naughty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccName</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;"> <span id="LC855" class="line" lang="haskell"><span class="n" style="color: #333;">check_naughty</span> <span class="n" style="color: #333;">lbl</span> <span class="n" style="color: #333;">id</span></span>
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<pre style="margin: 0;"> <span id="LC856" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isNaughtyRecordSelector</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">failWithTc</span> <span class="p">(</span><span class="n" style="color: #333;">naughtyRecordSel</span> <span class="n" style="color: #333;">lbl</span><span class="p">)</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="868" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
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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">@@ -868,15 +861,7 @@ nonBidirectionalErr name = failWithTc $</td>
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<pre style="margin: 0;"> <span id="LC861" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"non-bidirectional pattern synonym"</span></span>
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862
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<pre style="margin: 0;"> <span id="LC862" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">name</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"used in an expression"</span></span>
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863
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<pre style="margin: 0;"> <span id="LC863" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC871" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [HsVar: naughty record selectors]</span></span>
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<pre style="margin: 0;">-<span id="LC872" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">-<span id="LC873" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">All record selectors should really be HsRecFld (ambiguous or</span></span>
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<pre style="margin: 0;">-<span id="LC874" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">unambiguous), but currently not all of them are: see #18452. So we</span></span>
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<pre style="margin: 0;">-<span id="LC875" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">need to check for naughty record selectors in tc_infer_id, as well as</span></span>
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<pre style="margin: 0;">-<span id="LC876" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in tc_rec_sel_id.</span></span>
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<pre style="margin: 0;">-<span id="LC877" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC878" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Remove this code when fixing #18452.</span></span>
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<pre style="margin: 0;">-<span id="LC879" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC864" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<pre style="margin: 0;"> <span id="LC865" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Linear fields generalization]</span></span>
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<pre style="margin: 0;"> <span id="LC866" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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867
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<pre style="margin: 0;"> <span id="LC867" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">As per Note [Polymorphisation of linear fields], linear field of data</span></span>
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