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<h3>
Ben Gamari pushed to branch wip/zap-coercions
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/8711a4f80b017f33079189d44c545f7972a7e9b0">8711a4f8</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-03-27T14:45:35-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Rules: Match UnivCos
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6a41b6b1fc23f2d0251cf7da634e9453a20810d0">6a41b6b1</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-03-27T16:38:25-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix it
</pre>
</li>
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<h4>12 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#783e5dae6e86931f06700fc088fb7d48c8a07386">
compiler/GHC/Core/Coercion.hs
</a>
</li>
<li class="file-stats">
<a href="#b0ab2032bd0c006bb9cda1e5433173de35930f53">
compiler/GHC/Core/Coercion.hs-boot
</a>
</li>
<li class="file-stats">
<a href="#975dc08a8e7942b32d621f617d5a9c1b668601dd">
compiler/GHC/Core/Coercion/Opt.hs
</a>
</li>
<li class="file-stats">
<a href="#d01de95d8c71d4dec6a9a59146186e29a5b3fd38">
compiler/GHC/Core/Rules.hs
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<li class="file-stats">
<a href="#578c7c3857d66d963736ff6742f3433a0e8d01b7">
compiler/GHC/Core/TyCo/Rep.hs
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<li class="file-stats">
<a href="#8ee6f6851986ea96987a52f1dbf39228c85c6032">
compiler/GHC/Core/TyCo/Subst.hs
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<li class="file-stats">
<a href="#0b087d030078c501a74df752a832dd50836eb075">
compiler/GHC/Core/TyCo/Tidy.hs
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<li class="file-stats">
<a href="#84c9d3ba34173297e7d7747e02caa2e004b164fc">
compiler/GHC/Core/Type.hs
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<li class="file-stats">
<a href="#774d88050336ef660c7a219fb06c480c2fc639bc">
compiler/GHC/Driver/Session.hs
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<li class="file-stats">
<a href="#06ff7bac58fd8cfe0c17b81963b03f4cce86a065">
compiler/GHC/IfaceToCore.hs
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<li class="file-stats">
<a href="#1b594d79ffc66b4bbbefcc4dccef85df99efbb84">
compiler/typecheck/TcFlatten.hs
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<li class="file-stats">
<a href="#367db94fc37c8c7548dbe545a5302c7a5108e41e">
compiler/typecheck/TcMType.hs
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</ul>
<h4>Changes:</h4>
<li id="783e5dae6e86931f06700fc088fb7d48c8a07386">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#783e5dae6e86931f06700fc088fb7d48c8a07386"><strong>compiler/GHC/Core/Coercion.hs</strong></a>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="43" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="43" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -43,7 +43,10 @@ module GHC.Core.Coercion (</td>
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<td class="diff-line-num old_line" data-linenumber="43" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkKindCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">castCoercionKind</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">castCoercionKindI</span><span class="p">,</span></span>
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<td class="diff-line-num old_line" data-linenumber="44" style="width: 35px; color: rgba(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="LC44" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<td class="diff-line-num new_line" data-linenumber="45" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ** Zapping coercions</span></span>
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<td class="diff-line-num old old_line" data-linenumber="46" style="width: 35px; color: rgba(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="46" style="width: 35px; color: rgba(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="LC46" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkZappedCoercion</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">zapCoercion</span><span class="p">,</span></span>
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<td class="diff-line-num new old_line" data-linenumber="47" style="width: 35px; color: rgba(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="46" style="width: 35px; color: rgba(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="LC46" class="line" lang="haskell"></span>
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<td class="diff-line-num new old_line" data-linenumber="47" style="width: 35px; color: rgba(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="47" style="width: 35px; color: rgba(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="LC47" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkZappedCo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTcZappedCo</span><span class="p">,</span></span>
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<td class="diff-line-num new old_line" data-linenumber="47" style="width: 35px; color: rgba(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="48" style="width: 35px; color: rgba(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="LC48" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkZappedProv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkTcZappedProv</span><span class="p">,</span></span>
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<td class="diff-line-num new new_line" data-linenumber="49" style="width: 35px; color: rgba(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="LC49" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">perhapsZapCoercion</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">zapCoercion</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkHeteroCoercionType</span><span class="p">,</span></span>
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<td class="diff-line-num old_line" data-linenumber="49" style="width: 35px; color: rgba(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="LC52" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkPrimEqPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkReprPrimEqPred</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkPrimEqPredRole</span><span class="p">,</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="62" style="width: 35px; color: rgba(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="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">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -62,6 +65,7 @@ module GHC.Core.Coercion (</td>
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<td class="diff-line-num new_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">
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<pre style="margin: 0;"> <span id="LC65" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">splitFunCo_maybe</span><span class="p">,</span></span>
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<td class="diff-line-num new_line" data-linenumber="66" style="width: 35px; color: rgba(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="LC66" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">splitForAllCo_maybe</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">splitForAllCo_ty_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">splitForAllCo_co_maybe</span><span class="p">,</span></span>
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<td class="diff-line-num new new_line" data-linenumber="68" style="width: 35px; color: rgba(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="LC68" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">splitUnivCo_maybe</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nthRole</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tyConRolesX</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tyConRolesRepresentational</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">setNominalRole_maybe</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC71" 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">@@ -478,6 +482,10 @@ splitForAllCo_co_maybe (ForAllCo cv k_co co)</td>
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478
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482
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<pre style="margin: 0;"> <span id="LC482" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isCoVar</span> <span class="n" style="color: #333;">cv</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">cv</span><span class="p">,</span> <span class="n" style="color: #333;">k_co</span><span class="p">,</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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479
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483
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<pre style="margin: 0;"> <span id="LC483" class="line" lang="haskell"><span class="n" style="color: #333;">splitForAllCo_co_maybe</span> <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;">Nothing</span></span>
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480
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484
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<pre style="margin: 0;"> <span id="LC484" class="line" lang="haskell"></span>
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485
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<pre style="margin: 0;">+<span id="LC485" class="line" lang="haskell"><span class="n" style="color: #333;">splitUnivCo_maybe</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnivCoProvenance</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Role</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">)</span></span>
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486
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<pre style="margin: 0;">+<span id="LC486" class="line" lang="haskell"><span class="n" style="color: #333;">splitUnivCo_maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="n" style="color: #333;">prov</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">prov</span><span class="p">,</span> <span class="n" style="color: #333;">r</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span><span class="p">)</span></span>
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487
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<pre style="margin: 0;">+<span id="LC487" class="line" lang="haskell"><span class="n" style="color: #333;">splitUnivCo_maybe</span> <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;">Nothing</span></span>
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488
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<pre style="margin: 0;">+<span id="LC488" class="line" lang="haskell"></span>
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481
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489
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<pre style="margin: 0;"> <span id="LC489" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-------------------------------------------------------</span></span>
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482
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490
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<pre style="margin: 0;"> <span id="LC490" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- and some coercion kind stuff</span></span>
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491
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<pre style="margin: 0;"> <span id="LC491" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="980" style="width: 35px; color: rgba(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="988" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -980,12 +988,12 @@ mkTransCo co1 co2 | isReflCo co1 = co2</td>
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980
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988
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<pre style="margin: 0;"> <span id="LC988" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GRefl</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co1</span><span class="p">))</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GRefl</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="n" style="color: #333;">co2</span><span class="p">))</span></span>
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981
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989
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<pre style="margin: 0;"> <span id="LC989" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">GRefl</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MCo</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkTransCo</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">co2</span><span class="p">)</span></span>
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982
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990
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<pre style="margin: 0;"> <span id="LC990" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs1</span><span class="p">)</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1a</span> <span class="n" style="color: #333;">_t1b</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs2</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">_t2a</span> <span class="n" style="color: #333;">t2b</span><span class="p">)</span></span>
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983
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<pre style="margin: 0;">-<span id="LC983" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">fvs1</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">fvs2</span><span class="p">))</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1a</span> <span class="n" style="color: #333;">t2b</span></span>
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991
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<pre style="margin: 0;">+<span id="LC991" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left right">mk</span>ZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">fvs1</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">fvs2</span><span class="p">))</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1a</span> <span class="n" style="color: #333;">t2b</span></span>
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984
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992
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<pre style="margin: 0;"> <span id="LC992" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1a</span> <span class="n" style="color: #333;">_t1b</span><span class="p">)</span> <span class="n" style="color: #333;">co2</span></span>
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<pre style="margin: 0;">-<span id="LC985" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">fvs</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="n" style="color: #333;">co2</span><span class="p">))</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1a</span> <span class="n" style="color: #333;">t2b</span></span>
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<pre style="margin: 0;">+<span id="LC993" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left right">mk</span>ZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">fvs</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="n" style="color: #333;">co2</span><span class="p">))</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1a</span> <span class="n" style="color: #333;">t2b</span></span>
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<pre style="margin: 0;"> <span id="LC994" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">_t2a</span> <span class="n" style="color: #333;">t2b</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co2</span></span>
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<pre style="margin: 0;"> <span id="LC995" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransCo</span> <span class="n" style="color: #333;">co1</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">_t2a</span> <span class="n" style="color: #333;">t2b</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC988" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">fvs</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="n" style="color: #333;">co1</span><span class="p">))</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1a</span> <span class="n" style="color: #333;">t2b</span></span>
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<pre style="margin: 0;">+<span id="LC996" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left right">mk</span>ZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">fvs</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="n" style="color: #333;">co1</span><span class="p">))</span> <span class="n" style="color: #333;">r</span> <span class="n" style="color: #333;">t1a</span> <span class="n" style="color: #333;">t2b</span></span>
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<pre style="margin: 0;"> <span id="LC997" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">t1a</span> <span class="n" style="color: #333;">_t1b</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co1</span></span>
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<pre style="margin: 0;"> <span id="LC998" class="line" lang="haskell"><span class="n" style="color: #333;">mkTransCo</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">co2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TransCo</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">co2</span></span>
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<pre style="margin: 0;"> <span id="LC999" 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">@@ -1737,23 +1745,59 @@ keyword):</td>
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<pre style="margin: 0;"> <span id="LC1745" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1746" 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="LC1747" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1748" class="line" lang="haskell"><span class="n" style="color: #333;">mkZappedProv</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span></span>
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<pre style="margin: 0;">+<span id="LC1749" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">DTyCoVarSet</span></span>
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<pre style="margin: 0;">+<span id="LC1750" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UnivCoProvenance</span></span>
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<pre style="margin: 0;">+<span id="LC1751" class="line" lang="haskell"><span class="n" style="color: #333;">mkZappedProv</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;">+<span id="LC1752" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | debugIsOn && anyDVarSet isCoercionHole fvs = pprPanic "mkZappedProv(unexpected cohole)" (ppr fvs)</span></span>
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<pre style="margin: 0;">+<span id="LC1753" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC1754" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">filterDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">isCoercionHole</span><span class="p">)</span> <span class="n" style="color: #333;">fvs</span></span>
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1755
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<pre style="margin: 0;">+<span id="LC1755" class="line" lang="haskell"></span>
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1756
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<pre style="margin: 0;">+<span id="LC1756" class="line" lang="haskell"><span class="n" style="color: #333;">mkTcZappedProv</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span></span>
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1757
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<pre style="margin: 0;">+<span id="LC1757" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">DTyCoVarSet</span></span>
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1758
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<pre style="margin: 0;">+<span id="LC1758" 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;">CoercionHole</span><span class="p">]</span></span>
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1759
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<pre style="margin: 0;">+<span id="LC1759" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UnivCoProvenance</span></span>
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1760
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<pre style="margin: 0;">+<span id="LC1760" class="line" lang="haskell"><span class="n" style="color: #333;">mkTcZappedProv</span> <span class="n" style="color: #333;">fvs</span> <span class="n" style="color: #333;">coholes</span></span>
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1761
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<pre style="margin: 0;">+<span id="LC1761" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">debugIsOn</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">anyDVarSet</span> <span class="n" style="color: #333;">isCoercionHole</span> <span class="n" style="color: #333;">fvs</span> <span class="o" style="font-weight: 600;">=</span></span>
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1762
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<pre style="margin: 0;">+<span id="LC1762" class="line" lang="haskell"> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"mkTcZappedProv(unexpected cohole)"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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1763
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<pre style="margin: 0;">+<span id="LC1763" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span></span>
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1764
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<pre style="margin: 0;">+<span id="LC1764" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">filterDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">isCoercionHole</span><span class="p">)</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">coholes</span></span>
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1765
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<pre style="margin: 0;">+<span id="LC1765" class="line" lang="haskell"></span>
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1766
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<pre style="margin: 0;">+<span id="LC1766" class="line" lang="haskell"><span class="cd">-- | Smart constructor for 'TcZappedProv' 'UnivCo's.</span></span>
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1767
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<pre style="margin: 0;">+<span id="LC1767" class="line" lang="haskell"><span class="n" style="color: #333;">mkTcZappedCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span></span>
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1768
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<pre style="margin: 0;">+<span id="LC1768" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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1769
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<pre style="margin: 0;">+<span id="LC1769" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Role</span></span>
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1770
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<pre style="margin: 0;">+<span id="LC1770" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DTyCoVarSet</span></span>
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1771
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<pre style="margin: 0;">+<span id="LC1771" 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;">CoercionHole</span><span class="p">]</span></span>
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1772
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<pre style="margin: 0;">+<span id="LC1772" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span></span>
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1773
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<pre style="margin: 0;">+<span id="LC1773" class="line" lang="haskell"><span class="n" style="color: #333;">mkTcZappedCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span> <span class="n" style="color: #333;">coholes</span></span>
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1774
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<pre style="margin: 0;">+<span id="LC1774" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkUnivCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkTcZappedProv</span> <span class="n" style="color: #333;">fvs</span> <span class="n" style="color: #333;">coholes</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span></span>
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1775
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<pre style="margin: 0;">+<span id="LC1775" class="line" lang="haskell"></span>
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1776
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<pre style="margin: 0;">+<span id="LC1776" class="line" lang="haskell"><span class="cd">-- | Smart constructor for 'ZappedProv' 'UnivCo's.</span></span>
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<pre style="margin: 0;">+<span id="LC1777" class="line" lang="haskell"><span class="n" style="color: #333;">mkZappedCo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span></span>
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<pre style="margin: 0;">+<span id="LC1778" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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<pre style="margin: 0;">+<span id="LC1779" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Role</span></span>
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<pre style="margin: 0;">+<span id="LC1780" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DTyCoVarSet</span></span>
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<pre style="margin: 0;">+<span id="LC1781" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span></span>
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<pre style="margin: 0;">+<span id="LC1782" class="line" lang="haskell"><span class="n" style="color: #333;">mkZappedCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC1783" class="line" lang="haskell"> <span class="n" style="color: #333;">mkUnivCo</span> <span class="p">(</span><span class="n" style="color: #333;">mkZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span></span>
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<pre style="margin: 0;">+<span id="LC1784" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1785" class="line" lang="haskell"><span class="cd">-- | Make a zapped coercion if building of coercions is disabled, otherwise</span></span>
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<pre style="margin: 0;"> <span id="LC1786" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- return the given un-zapped coercion.</span></span>
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<pre style="margin: 0;">-<span id="LC1742" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left right">mkZapped</span>Coercion</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span></span>
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<pre style="margin: 0;">-<span id="LC1743" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span></span>
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<pre style="margin: 0;">-<span id="LC1744" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ the un-zapped coercion</span></span>
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<pre style="margin: 0;">-<span id="LC1745" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ the kind of the coercion</span></span>
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<pre style="margin: 0;">-<span id="LC1746" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Role</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ the role of the coercion</span></span>
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<pre style="margin: 0;">-<span id="LC1747" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DTyCoVarSet</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ the free variables of the coercion</span></span>
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<pre style="margin: 0;">-<span id="LC1748" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span></span>
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<pre style="margin: 0;">-<span id="LC1749" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left">mkZappedCoercion</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">co</span></span><span class="idiff right"> </span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;">+<span id="LC1787" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left right">perhapsZap</span>Coercion</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span></span>
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<pre style="margin: 0;">+<span id="LC1788" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span></span>
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<pre style="margin: 0;">+<span id="LC1789" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ the un-zapped coercion</span></span>
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<pre style="margin: 0;">+<span id="LC1790" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ the kind of the coercion</span></span>
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1791
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<pre style="margin: 0;">+<span id="LC1791" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Role</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ the role of the coercion</span></span>
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1792
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<pre style="margin: 0;">+<span id="LC1792" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DTyCoVarSet</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ the free variables of the coercion</span></span>
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1793
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<pre style="margin: 0;">+<span id="LC1793" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Coercion</span></span>
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1794
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<pre style="margin: 0;">+<span id="LC1794" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left">perhapsZapCoercion</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">co</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pair</span></span><span class="o" style="font-weight: 600;"><span class="idiff right">@</span></span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span></span>
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1750
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1795
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<pre style="margin: 0;"> <span id="LC1795" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">debugIsOn</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">real_role</span> <span class="o" style="font-weight: 600;">/=</span> <span class="n" style="color: #333;">role</span> <span class="o" style="font-weight: 600;">=</span></span>
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1751
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<pre style="margin: 0;">-<span id="LC1751" class="line" lang="haskell"> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"<span class="idiff left right">mkZapped</span>Coercion(roles mismatch)"</span> <span class="n" style="color: #333;">panic_doc</span></span>
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1796
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<pre style="margin: 0;">+<span id="LC1796" class="line" lang="haskell"> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"<span class="idiff left right">perhapsZap</span>Coercion(roles mismatch)"</span> <span class="n" style="color: #333;">panic_doc</span></span>
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1752
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1797
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<pre style="margin: 0;"> <span id="LC1797" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">debugIsOn</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">not</span> <span class="n" style="color: #333;">co_kind_ok</span> <span class="o" style="font-weight: 600;">=</span></span>
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1753
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<pre style="margin: 0;">-<span id="LC1753" class="line" lang="haskell"> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"<span class="idiff left right">mkZapped</span>Coercion(kind mismatch)"</span> <span class="n" style="color: #333;">panic_doc</span></span>
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1798
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<pre style="margin: 0;">+<span id="LC1798" class="line" lang="haskell"> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"<span class="idiff left right">perhapsZap</span>Coercion(kind mismatch)"</span> <span class="n" style="color: #333;">panic_doc</span></span>
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1754
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1799
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<pre style="margin: 0;"> <span id="LC1799" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">shouldBuildCoercions</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">co</span></span>
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1755
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<pre style="margin: 0;">-<span id="LC1755" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span></span>
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1756
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<pre style="margin: 0;">-<span id="LC1756" class="line" lang="haskell"> <span class="n" style="color: #333;">mkUnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span></span>
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1800
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<pre style="margin: 0;">+<span id="LC1800" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkZappedCo</span> <span class="n" style="color: #333;">pair</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span></span>
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1757
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1801
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<pre style="margin: 0;"> <span id="LC1801" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1758
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1802
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<pre style="margin: 0;"> <span id="LC1802" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">real_ty1</span> <span class="n" style="color: #333;">real_ty2</span><span class="p">,</span> <span class="n" style="color: #333;">real_role</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKindRole</span> <span class="n" style="color: #333;">co</span></span>
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1759
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1803
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<pre style="margin: 0;"> <span id="LC1803" class="line" lang="haskell"> <span class="n" style="color: #333;">real_fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="n" style="color: #333;">co</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1781" style="width: 35px; color: rgba(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="1825" style="width: 35px; color: rgba(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">@@ -1781,7 +1825,7 @@ zapCoercion :: DynFlags -> Coercion -> Coercion</td>
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1781
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1825
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<pre style="margin: 0;"> <span id="LC1825" class="line" lang="haskell"><span class="n" style="color: #333;">zapCoercion</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">co</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">co</span> <span class="c1" style="color: #998; font-style: italic;">-- already zapped</span></span>
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<pre style="margin: 0;"> <span id="LC1826" class="line" lang="haskell"><span class="n" style="color: #333;">zapCoercion</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">co</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Refl</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;">co</span> <span class="c1" style="color: #998; font-style: italic;">-- Refl is smaller than zapped coercions</span></span>
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<pre style="margin: 0;"> <span id="LC1827" class="line" lang="haskell"><span class="n" style="color: #333;">zapCoercion</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC1784" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">mkZapped</span>Coercion</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;">+<span id="LC1828" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left right">perhapsZap</span>Coercion</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;"> <span id="LC1829" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC1830" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span><span class="p">,</span> <span class="n" style="color: #333;">role</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">coercionKindRole</span> <span class="n" style="color: #333;">co</span></span>
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<pre style="margin: 0;"> <span id="LC1831" class="line" lang="haskell"> <span class="n" style="color: #333;">fvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">filterDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">isCoercionHole</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="n" style="color: #333;">co</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#b0ab2032bd0c006bb9cda1e5433173de35930f53"><strong>compiler/GHC/Core/Coercion.hs-boot</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">@@ -9,7 +9,9 @@ import {-# SOURCE #-} GHC.Core.TyCon</td>
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">BasicTypes</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">LeftOrRight</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Coercion.Axiom</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCo.Rep</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoercionHole</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Var</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">VarSet</span></span>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Pair</span></span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Util</span></span>
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<pre style="margin: 0;"> <span id="LC17" 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">@@ -41,6 +43,9 @@ decomposePiCos :: HasDebugCallStack => Coercion -> Pair Type -> [Type] -> ([Coer</td>
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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"><span class="n" style="color: #333;">coVarKindsTypesRole</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">CoVar</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Kind</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Kind</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Role</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="haskell"><span class="n" style="color: #333;">coVarRole</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoVar</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Role</span></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="haskell"><span class="n" style="color: #333;">mkZappedProv</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">DTyCoVarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UnivCoProvenance</span></span>
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<pre style="margin: 0;">+<span id="LC47" class="line" lang="haskell"><span class="n" style="color: #333;">mkTcZappedProv</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HasDebugCallStack</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">DTyCoVarSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoercionHole</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UnivCoProvenance</span></span>
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<pre style="margin: 0;">+<span id="LC48" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoercionType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Role</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">LiftingContext</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#975dc08a8e7942b32d621f617d5a9c1b668601dd"><strong>compiler/GHC/Core/Coercion/Opt.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">@@ -499,17 +499,17 @@ opt_univ env sym (PhantomProv h) _r ty1 ty2</td>
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<pre style="margin: 0;"> <span id="LC499" class="line" lang="haskell"> <span class="n" style="color: #333;">ty2'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span> <span class="p">(</span><span class="n" style="color: #333;">lcSubstRight</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">ty2</span></span>
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<pre style="margin: 0;"> <span id="LC500" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC501" class="line" lang="haskell"><span class="n" style="color: #333;">opt_univ</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">sym</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span></span>
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<pre style="margin: 0;">-<span id="LC502" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">sym</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkUnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs'</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">ty2'</span> <span class="n" style="color: #333;">ty1'</span></span>
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<pre style="margin: 0;">-<span id="LC503" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkUnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs'</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">ty1'</span> <span class="n" style="color: #333;">ty2'</span></span>
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<pre style="margin: 0;">+<span id="LC502" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkZappedCo</span> <span class="n" style="color: #333;">pair</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs'</span></span>
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<pre style="margin: 0;"> <span id="LC503" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC504" class="line" lang="haskell"> <span class="n" style="color: #333;">pair</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">sym</span> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty2'</span> <span class="n" style="color: #333;">ty1'</span> <span class="kr" style="font-weight: 600;">else</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty1'</span> <span class="n" style="color: #333;">ty2'</span></span>
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<pre style="margin: 0;"> <span id="LC505" class="line" lang="haskell"> <span class="n" style="color: #333;">ty1'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span> <span class="p">(</span><span class="n" style="color: #333;">lcSubstLeft</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">ty1</span></span>
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<pre style="margin: 0;"> <span id="LC506" class="line" lang="haskell"> <span class="n" style="color: #333;">ty2'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span> <span class="p">(</span><span class="n" style="color: #333;">lcSubstRight</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">ty2</span></span>
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<pre style="margin: 0;"> <span id="LC507" class="line" lang="haskell"> <span class="n" style="color: #333;">fvs'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substFreeDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">lcTCvSubst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;"> <span id="LC508" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC509" class="line" lang="haskell"><span class="n" style="color: #333;">opt_univ</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">sym</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="n" style="color: #333;">fvs</span> <span class="n" style="color: #333;">coholes</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span></span>
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<pre style="margin: 0;">-<span id="LC510" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">sym</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkUnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="n" style="color: #333;">fvs'</span> <span class="n" style="color: #333;">coholes</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">ty2'</span> <span class="n" style="color: #333;">ty1'</span></span>
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<pre style="margin: 0;">-<span id="LC511" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkUnivCo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="n" style="color: #333;">fvs'</span> <span class="n" style="color: #333;">coholes</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">ty1'</span> <span class="n" style="color: #333;">ty2'</span></span>
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<pre style="margin: 0;">+<span id="LC510" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTcZappedCo</span> <span class="n" style="color: #333;">pair</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs'</span> <span class="n" style="color: #333;">coholes</span></span>
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<pre style="margin: 0;"> <span id="LC511" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC512" class="line" lang="haskell"> <span class="n" style="color: #333;">pair</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">sym</span> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty2'</span> <span class="n" style="color: #333;">ty1'</span> <span class="kr" style="font-weight: 600;">else</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty1'</span> <span class="n" style="color: #333;">ty2'</span></span>
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<pre style="margin: 0;"> <span id="LC513" class="line" lang="haskell"> <span class="n" style="color: #333;">ty1'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span> <span class="p">(</span><span class="n" style="color: #333;">lcSubstLeft</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">ty1</span></span>
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<pre style="margin: 0;"> <span id="LC514" class="line" lang="haskell"> <span class="n" style="color: #333;">ty2'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span> <span class="p">(</span><span class="n" style="color: #333;">lcSubstRight</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">ty2</span></span>
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<pre style="margin: 0;"> <span id="LC515" class="line" lang="haskell"> <span class="n" style="color: #333;">fvs'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substFreeDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">lcTCvSubst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">fvs</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">@@ -573,9 +573,9 @@ opt_univ env sym prov role oty1 oty2</td>
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<pre style="margin: 0;"> <span id="LC573" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">PhantomProv</span> <span class="n" style="color: #333;">kco</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PhantomProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">opt_co4_wrap</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">sym</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="n" style="color: #333;">kco</span></span>
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<pre style="margin: 0;"> <span id="LC574" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="n" style="color: #333;">kco</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">opt_co4_wrap</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">sym</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="kt" style="color: #458; font-weight: 600;">Nominal</span> <span class="n" style="color: #333;">kco</span></span>
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<pre style="margin: 0;"> <span id="LC575" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">PluginProv</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">prov</span></span>
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<pre style="margin: 0;">-<span id="LC576" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">substFreeDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">lcTCvSubst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;">+<span id="LC576" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">substFreeDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">lcTCvSubst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;"> <span id="LC577" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="n" style="color: #333;">fvs</span> <span class="n" style="color: #333;">coholes</span></span>
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<pre style="margin: 0;">-<span id="LC578" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">substFreeDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">lcTCvSubst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">coholes</span></span>
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<pre style="margin: 0;">+<span id="LC578" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">substFreeDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">lcTCvSubst</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">coholes</span></span>
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<pre style="margin: 0;"> <span id="LC579" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC580" 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="LC581" class="line" lang="haskell"><span class="n" style="color: #333;">opt_transList</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">InScopeSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">NormalCo</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">NormalCo</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">NormalCo</span><span class="p">]</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">@@ -658,10 +658,10 @@ opt_trans_rule is in_co1@(UnivCo p1 r1 tyl1 _tyr1)</td>
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<pre style="margin: 0;"> <span id="LC658" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">opt_trans</span> <span class="n" style="color: #333;">is</span> <span class="n" style="color: #333;">kco1</span> <span class="n" style="color: #333;">kco2</span></span>
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<pre style="margin: 0;"> <span id="LC659" class="line" lang="haskell"> <span class="n" style="color: #333;">opt_trans_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PluginProv</span> <span class="n" style="color: #333;">str1</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PluginProv</span> <span class="n" style="color: #333;">str2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">str1</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">str2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">p1</span></span>
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<pre style="margin: 0;"> <span id="LC660" class="line" lang="haskell"> <span class="n" style="color: #333;">opt_trans_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs1</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs2</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC661" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">fvs1</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">fvs2</span></span>
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<pre style="margin: 0;">+<span id="LC661" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">fvs1</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">fvs2</span></span>
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<pre style="margin: 0;"> <span id="LC662" class="line" lang="haskell"> <span class="n" style="color: #333;">opt_trans_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="n" style="color: #333;">fvs1</span> <span class="n" style="color: #333;">coholes1</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC663" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="n" style="color: #333;">fvs2</span> <span class="n" style="color: #333;">coholes2</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC664" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">fvs1</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">fvs2</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">coholes1</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">coholes2</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC664" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">fvs1</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">fvs2</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">coholes1</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">coholes2</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC665" class="line" lang="haskell"> <span class="n" style="color: #333;">opt_trans_prov</span> <span class="kr" style="font-weight: 600;">_</span> <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;">Nothing</span></span>
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<pre style="margin: 0;"> <span id="LC666" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC667" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Push transitivity down through matching top-level constructors.</span></span>
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<li id="d01de95d8c71d4dec6a9a59146186e29a5b3fd38">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#d01de95d8c71d4dec6a9a59146186e29a5b3fd38"><strong>compiler/GHC/Core/Rules.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">@@ -63,6 +63,7 @@ import Outputable</td>
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<pre style="margin: 0;"> <span id="LC63" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">FastString</span></span>
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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Maybes</span></span>
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<pre style="margin: 0;"> <span id="LC65" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Bag</span></span>
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<pre style="margin: 0;">+<span id="LC66" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Pair</span></span>
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Util</span></span>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Ord</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">@@ -840,6 +841,14 @@ match_co renv subst co1 co2</td>
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<pre style="margin: 0;"> <span id="LC841" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">arg2</span><span class="p">,</span> <span class="n" style="color: #333;">res2</span><span class="p">)</span></span>
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842
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<pre style="margin: 0;"> <span id="LC842" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">match_cos</span> <span class="n" style="color: #333;">renv</span> <span class="n" style="color: #333;">subst</span> <span class="p">[</span><span class="n" style="color: #333;">arg1</span><span class="p">,</span> <span class="n" style="color: #333;">res1</span><span class="p">]</span> <span class="p">[</span><span class="n" style="color: #333;">arg2</span><span class="p">,</span> <span class="n" style="color: #333;">res2</span><span class="p">]</span></span>
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843
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<pre style="margin: 0;"> <span id="LC843" 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;">Nothing</span></span>
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<pre style="margin: 0;">+<span id="LC844" class="line" lang="haskell"><span class="n" style="color: #333;">match_co</span> <span class="n" style="color: #333;">renv</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">co1</span> <span class="n" style="color: #333;">co2</span></span>
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<pre style="margin: 0;">+<span id="LC845" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">prov1</span><span class="p">,</span> <span class="n" style="color: #333;">r1</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty1a</span> <span class="n" style="color: #333;">ty1b</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitUnivCo_maybe</span> <span class="n" style="color: #333;">co1</span></span>
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846
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<pre style="margin: 0;">+<span id="LC846" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">prov2</span><span class="p">,</span> <span class="n" style="color: #333;">r2</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">ty2a</span> <span class="n" style="color: #333;">ty2b</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">splitUnivCo_maybe</span> <span class="n" style="color: #333;">co2</span></span>
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<pre style="margin: 0;">+<span id="LC847" 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;">guard</span> <span class="p">(</span><span class="n" style="color: #333;">r1</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">r2</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC848" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- TODO: Should we try to match provenance?</span></span>
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849
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<pre style="margin: 0;">+<span id="LC849" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">subst'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">match_ty</span> <span class="n" style="color: #333;">renv</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">ty1a</span> <span class="n" style="color: #333;">ty2a</span></span>
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<pre style="margin: 0;">+<span id="LC850" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">match_ty</span> <span class="n" style="color: #333;">renv</span> <span class="n" style="color: #333;">subst'</span> <span class="n" style="color: #333;">ty1b</span> <span class="n" style="color: #333;">ty2b</span></span>
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<pre style="margin: 0;">+<span id="LC851" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC852" class="line" lang="haskell"><span class="n" style="color: #333;">match_co</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">_co1</span> <span class="n" style="color: #333;">_co2</span></span>
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<pre style="margin: 0;"> <span id="LC853" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Currently just deals with CoVarCo, TyConAppCo and Refl</span></span>
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<pre style="margin: 0;"> <span id="LC854" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">defined</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DEBUG</span><span class="p">)</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#578c7c3857d66d963736ff6742f3433a0e8d01b7"><strong>compiler/GHC/Core/TyCo/Rep.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">@@ -1875,7 +1875,7 @@ foldTyCo (TyCoFolder { tcf_view = view</td>
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<pre style="margin: 0;"> <span id="LC1875" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">acc</span></span>
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<pre style="margin: 0;"> <span id="LC1876" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isTyVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyvar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span> <span class="p">`</span><span class="n" style="color: #333;">mappend</span><span class="p">`</span> <span class="n" style="color: #333;">acc</span></span>
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<pre style="margin: 0;"> <span id="LC1877" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isCoVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">covar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span> <span class="p">`</span><span class="n" style="color: #333;">mappend</span><span class="p">`</span> <span class="n" style="color: #333;">acc</span></span>
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<pre style="margin: 0;">-<span id="LC1878" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">error</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff right">"unknown thingy"</span></span></span>
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<pre style="margin: 0;">+<span id="LC1878" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">pprPanic</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff">"unknown thingy"</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">v</span></span><span class="p"><span class="idiff right">)</span></span></span>
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<pre style="margin: 0;"> <span id="LC1879" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1880" 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="LC1881" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<li id="8ee6f6851986ea96987a52f1dbf39228c85c6032">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#8ee6f6851986ea96987a52f1dbf39228c85c6032"><strong>compiler/GHC/Core/TyCo/Subst.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">@@ -64,7 +64,7 @@ import {-# SOURCE #-} GHC.Core.Coercion</td>
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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkFunCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkForAllCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkUnivCo</span></span>
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<pre style="margin: 0;"> <span id="LC65" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkAxiomInstCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkAppCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkGReflCo</span></span>
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<pre style="margin: 0;"> <span id="LC66" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkInstCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkLRCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkTyConAppCo</span></span>
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<pre style="margin: 0;">-<span id="LC67" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkCoercionType</span></span>
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<pre style="margin: 0;">+<span id="LC67" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkCoercionType</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mkZappedProv</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">mkTcZappedProv</span></span></span>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">coercionKind</span><span class="p">,</span> <span class="n" style="color: #333;">coercionLKind</span><span class="p">,</span> <span class="n" style="color: #333;">coVarKindsTypesRole</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC70" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCo.Rep</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">@@ -825,9 +825,9 @@ subst_co subst co</td>
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<pre style="margin: 0;"> <span id="LC825" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PhantomProv</span> <span class="n" style="color: #333;">kco</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PhantomProv</span> <span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">kco</span><span class="p">)</span></span>
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826
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826
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<pre style="margin: 0;"> <span id="LC826" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="n" style="color: #333;">kco</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">kco</span><span class="p">)</span></span>
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827
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<pre style="margin: 0;"> <span id="LC827" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="n" style="color: #333;">p</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PluginProv</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;">p</span></span>
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<pre style="margin: 0;">-<span id="LC828" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">substFreeDVarSet</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC828" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>ZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">substFreeDVarSet</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC829" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="n" style="color: #333;">fvs</span> <span class="n" style="color: #333;">coholes</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC830" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">substFreeDVarSet</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">coholes</span></span>
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<pre style="margin: 0;">+<span id="LC830" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">substFreeDVarSet</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">coholes</span></span>
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<pre style="margin: 0;"> <span id="LC831" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC832" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Substituting in a coercion hole]</span></span>
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<pre style="margin: 0;"> <span id="LC833" class="line" lang="haskell"> <span class="n" style="color: #333;">go_hole</span> <span class="n" style="color: #333;">h</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoercionHole</span> <span class="p">{</span> <span class="n" style="color: #333;">ch_co_var</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cv</span> <span class="p">})</span></span>
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<li id="0b087d030078c501a74df752a832dd50836eb075">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#0b087d030078c501a74df752a832dd50836eb075"><strong>compiler/GHC/Core/TyCo/Tidy.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">@@ -21,6 +21,7 @@ module GHC.Core.TyCo.Tidy</td>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GhcPrelude</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCo.Rep</span></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="err" style="color: #a61717; background-color: #e3d2d2;">{-#</span> <span class="nn" style="color: #555;">SOURCE</span> <span class="o" style="font-weight: 600;">#-</span><span class="p">}</span> <span class="kt" style="color: #458; font-weight: 600;">GHC</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Core</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">Coercion</span> <span class="p">(</span> <span class="n" style="color: #333;">mkZappedProv</span><span class="p">,</span> <span class="n" style="color: #333;">mkTcZappedProv</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCo.FVs</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">tyCoVarsOfTypesWellScoped</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tyCoVarsOfTypeList</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Name</span> <span class="k" style="font-weight: 600;">hiding</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">varName</span><span class="p">)</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">@@ -230,10 +231,10 @@ tidyCo env@(_, subst) co</td>
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<pre style="margin: 0;"> <span id="LC231" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PhantomProv</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PhantomProv</span> <span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC232" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC233" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="n" style="color: #333;">p</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PluginProv</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;">p</span></span>
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<pre style="margin: 0;">-<span id="LC233" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mapUnionDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">unitDVarSet</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">substCoVar</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">dVarSetElems</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC234" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mapUnionDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">unitDVarSet</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">substCoVar</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">dVarSetElems</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC235" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="n" style="color: #333;">fvs</span> <span class="n" style="color: #333;">coholes</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC235" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">mapUnionDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">unitDVarSet</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">substCoVar</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">dVarSetElems</span> <span class="n" style="color: #333;">fvs</span><span class="p">))</span></span>
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<pre style="margin: 0;">-<span id="LC236" class="line" lang="haskell"> <span class="n" style="color: #333;">coholes</span> <span class="c1" style="color: #998; font-style: italic;">-- Tidying needed?</span></span>
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<pre style="margin: 0;">+<span id="LC236" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">mapUnionDVarSet</span> <span class="p">(</span><span class="n" style="color: #333;">unitDVarSet</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">substCoVar</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">dVarSetElems</span> <span class="n" style="color: #333;">fvs</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC237" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="n" style="color: #333;">coholes</span> <span class="c1" style="color: #998; font-style: italic;">-- Tidying needed?</span></span>
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<pre style="margin: 0;"> <span id="LC238" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC239" class="line" lang="haskell"> <span class="n" style="color: #333;">substCoVar</span> <span class="n" style="color: #333;">cv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fromMaybe</span> <span class="n" style="color: #333;">cv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">lookupVarEnv</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">cv</span></span>
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<pre style="margin: 0;"> <span id="LC240" class="line" lang="haskell"></span>
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<li id="84c9d3ba34173297e7d7747e02caa2e004b164fc">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#84c9d3ba34173297e7d7747e02caa2e004b164fc"><strong>compiler/GHC/Core/Type.hs</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="254" style="width: 35px; color: rgba(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">@@ -254,6 +254,7 @@ import {-# SOURCE #-} GHC.Core.Coercion</td>
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<pre style="margin: 0;"> <span id="LC254" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkForAllCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkFunCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkAxiomInstCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkUnivCo</span></span>
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<pre style="margin: 0;"> <span id="LC255" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkSymCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkTransCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkNthCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkLRCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkInstCo</span></span>
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<pre style="margin: 0;"> <span id="LC256" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkKindCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkSubCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkFunCo</span><span class="p">,</span> <span class="n" style="color: #333;">mkAxiomInstCo</span></span>
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<pre style="margin: 0;">+<span id="LC257" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">mkZappedProv</span><span class="p">,</span> <span class="n" style="color: #333;">mkTcZappedProv</span></span>
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<pre style="margin: 0;"> <span id="LC258" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">decomposePiCos</span><span class="p">,</span> <span class="n" style="color: #333;">coercionKind</span><span class="p">,</span> <span class="n" style="color: #333;">coercionLKind</span></span>
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<pre style="margin: 0;"> <span id="LC259" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">coercionRKind</span><span class="p">,</span> <span class="n" style="color: #333;">coercionType</span></span>
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<pre style="margin: 0;"> <span id="LC260" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">isReflexiveCo</span><span class="p">,</span> <span class="n" style="color: #333;">seqCo</span> <span class="p">)</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">@@ -475,9 +476,9 @@ expandTypeSynonyms ty</td>
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<pre style="margin: 0;"> <span id="LC476" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="p">(</span><span class="n" style="color: #333;">go_co</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC477" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">p</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PluginProv</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;">p</span></span>
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<pre style="margin: 0;"> <span id="LC478" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC478" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">substFreeDVarSet</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;">+<span id="LC479" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">substFreeDVarSet</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;"> <span id="LC480" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="n" style="color: #333;">subst</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="n" style="color: #333;">fvs</span> <span class="n" style="color: #333;">coholes</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC480" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">substFreeDVarSet</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">coholes</span></span>
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<pre style="margin: 0;">+<span id="LC481" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>TcZappedProv</span> <span class="p">(</span><span class="n" style="color: #333;">substFreeDVarSet</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span> <span class="n" style="color: #333;">coholes</span></span>
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<pre style="margin: 0;"> <span id="LC482" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC483" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- the "False" and "const" are to accommodate the type of</span></span>
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<pre style="margin: 0;"> <span id="LC484" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- substForAllCoBndrUsing, which is general enough to</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">@@ -721,21 +722,18 @@ mapTyCoX (TyCoMapper { tcm_tyvar = tyvar</td>
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<pre style="margin: 0;"> <span id="LC722" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="n" style="color: #333;">co</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ProofIrrelProv</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">go_co</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">co</span></span>
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<pre style="margin: 0;"> <span id="LC723" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">p</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PluginProv</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">p</span></span>
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<pre style="margin: 0;"> <span id="LC724" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC724" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">bndrFVs</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;">-<span id="LC725" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isCoVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">covar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;">-<span id="LC726" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isTyVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfTypeDSet</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">tyvar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;">-<span id="LC727" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"mapCoercion(ZappedProv): Bad free variable"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">v</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC728" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">fvs'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unionDVarSets</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">bndrFVs</span> <span class="p">(</span><span class="n" style="color: #333;">dVarSetElems</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC729" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="n" style="color: #333;">fvs'</span></span>
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725
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<pre style="margin: 0;">+<span id="LC725" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">fvs'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unionDVarSets</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mapM</span> <span class="p">(</span><span class="n" style="color: #333;">bndr_fvs</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">dVarSetElems</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC726" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkZappedProv</span> <span class="n" style="color: #333;">fvs'</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC727" class="line" lang="haskell"> <span class="n" style="color: #333;">go_prov</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcZappedProv</span> <span class="n" style="color: #333;">fvs</span> <span class="n" style="color: #333;">coholes</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC731" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">bndrFVs</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;">-<span id="LC732" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isCoVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">covar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span></span>
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733
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<pre style="margin: 0;">-<span id="LC733" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isTyVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfTypeDSet</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">tyvar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span></span>
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734
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<pre style="margin: 0;">-<span id="LC734" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"mapCoercion(TcZappedProv): Bad free variable"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">v</span><span class="p">)</span></span>
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735
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<pre style="margin: 0;">-<span id="LC735" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">fvs'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unionDVarSets</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">bndrFVs</span> <span class="p">(</span><span class="n" style="color: #333;">dVarSetElems</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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736
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<pre style="margin: 0;">-<span id="LC736" class="line" lang="haskell"> <span class="n" style="color: #333;">coholes'</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;">cohole</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">coholes</span></span>
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<pre style="margin: 0;">-<span id="LC737" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">fvs''</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapUnionDVarSet</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="n" style="color: #333;">coholes'</span></span>
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738
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<pre style="margin: 0;">-<span id="LC738" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">fvs'</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">fvs''</span></span>
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<pre style="margin: 0;">+<span id="LC728" 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;">fvs'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unionDVarSets</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mapM</span> <span class="p">(</span><span class="n" style="color: #333;">bndr_fvs</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">dVarSetElems</span> <span class="n" style="color: #333;">fvs</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC729" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">coholes'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapM</span> <span class="p">(</span><span class="n" style="color: #333;">cohole</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">coholes</span></span>
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<pre style="margin: 0;">+<span id="LC730" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">fvs''</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapUnionDVarSet</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="n" style="color: #333;">coholes'</span></span>
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<pre style="margin: 0;">+<span id="LC731" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">fvs'</span> <span class="p">`</span><span class="n" style="color: #333;">unionDVarSet</span><span class="p">`</span> <span class="n" style="color: #333;">fvs''</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC732" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC733" class="line" lang="haskell"> <span class="n" style="color: #333;">bndr_fvs</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;">+<span id="LC734" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isCoVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfCoDSet</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">covar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span></span>
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735
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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="n" style="color: #333;">isTyVar</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyCoVarsOfTypeDSet</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">tyvar</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;">+<span id="LC736" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"mapCoercion(ZappedProv): Bad free variable"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">v</span><span class="p">)</span></span>
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739
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737
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<pre style="margin: 0;"> <span id="LC737" class="line" lang="haskell"></span>
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738
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<pre style="margin: 0;"> <span id="LC738" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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741
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739
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<pre style="margin: 0;"> <span id="LC739" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#774d88050336ef660c7a219fb06c480c2fc639bc"><strong>compiler/GHC/Driver/Session.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">@@ -1191,7 +1191,7 @@ data RtsOptsEnabled</td>
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1191
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1191
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<pre style="margin: 0;"> <span id="LC1191" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Zapping coercions] for details.</span></span>
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1192
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<pre style="margin: 0;"> <span id="LC1192" class="line" lang="haskell"><span class="n" style="color: #333;">shouldBuildCoercions</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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1193
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1193
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<pre style="margin: 0;"> <span id="LC1193" class="line" lang="haskell"><span class="n" style="color: #333;">shouldBuildCoercions</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;">=</span></span>
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1194
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<pre style="margin: 0;">-<span id="LC1194" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">gopt</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Opt_DoCoreLinting</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dflags</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">not</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">gopt</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Opt_DropCoercions</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dflags</span></span><span class="p"><span class="idiff right">)</span></span></span>
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1194
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<pre style="margin: 0;">+<span id="LC1194" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">not</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">gopt</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Opt_DropCoercions</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dflags</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- && gopt Opt_DoCoreLinting dflags</span></span></span>
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1195
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<pre style="margin: 0;"> <span id="LC1195" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- TODO: Add flag to explicitly enable coercion generation without linting?</span></span>
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1196
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<pre style="margin: 0;"> <span id="LC1196" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1197" class="line" lang="haskell"><span class="cd">-- | Are we building with @-fPIE@ or @-fPIC@ enabled?</span></span>
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<li id="06ff7bac58fd8cfe0c17b81963b03f4cce86a065">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#06ff7bac58fd8cfe0c17b81963b03f4cce86a065"><strong>compiler/GHC/IfaceToCore.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">@@ -1260,7 +1260,7 @@ tcIfaceUnivCoProv (IfacePluginProv str) = return $ PluginProv str</td>
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1260
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1260
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<pre style="margin: 0;"> <span id="LC1260" class="line" lang="haskell"><span class="n" style="color: #333;">tcIfaceUnivCoProv</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IfaceZappedProv</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">cvs</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span></span>
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1261
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1261
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<pre style="margin: 0;"> <span id="LC1261" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">cvs'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">tcIfaceLclId</span> <span class="n" style="color: #333;">cvs</span></span>
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1262
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1262
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<pre style="margin: 0;"> <span id="LC1262" class="line" lang="haskell"> <span class="n" style="color: #333;">tvs'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">tcIfaceTyVar</span> <span class="n" style="color: #333;">tvs</span></span>
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1263
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<pre style="margin: 0;">-<span id="LC1263" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkDVarSet</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">cvs'</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">tvs'</span></span>
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<pre style="margin: 0;">+<span id="LC1263" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left right">mk</span>ZappedProv</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkDVarSet</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">cvs'</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">tvs'</span></span>
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1264
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<pre style="margin: 0;"> <span id="LC1264" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1265" 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="LC1266" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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<li id="1b594d79ffc66b4bbbefcc4dccef85df99efbb84">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#1b594d79ffc66b4bbbefcc4dccef85df99efbb84"><strong>compiler/typecheck/TcFlatten.hs</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1511" style="width: 35px; color: rgba(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">@@ -1511,7 +1511,7 @@ flatten_exact_fam_app_fully tc tys</td>
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<pre style="margin: 0;"> <span id="LC1511" class="line" lang="haskell"> <span class="n" style="color: #333;">co'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTcCoherenceLeftCo</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">xi</span> <span class="n" style="color: #333;">kind_co</span> <span class="p">(</span><span class="n" style="color: #333;">mkSymCo</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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1512
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<pre style="margin: 0;"> <span id="LC1512" class="line" lang="haskell"> <span class="n" style="color: #333;">co'_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">xi'</span> <span class="n" style="color: #333;">fam_ty</span></span>
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1513
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<pre style="margin: 0;"> <span id="LC1513" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- co' :: (xi |> kind_co) ~role fam_ty</span></span>
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<pre style="margin: 0;">-<span id="LC1514" class="line" lang="haskell"> <span class="n" style="color: #333;">co''</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">update_co</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left right">mkZapped</span>Coercion</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">co'</span> <span class="n" style="color: #333;">co'_kind</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;">+<span id="LC1514" class="line" lang="haskell"> <span class="n" style="color: #333;">co''</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">update_co</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left right">perhapsZap</span>Coercion</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">co'</span> <span class="n" style="color: #333;">co'_kind</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span></span>
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1515
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<pre style="margin: 0;"> <span id="LC1515" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--co'' = update_co co'</span></span>
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<pre style="margin: 0;"> <span id="LC1516" class="line" lang="haskell"> <span class="p">;</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;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">xi'</span><span class="p">,</span> <span class="n" style="color: #333;">co''</span><span class="p">)</span> <span class="p">}</span></span>
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1517
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<pre style="margin: 0;"> <span id="LC1517" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="p">}</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">@@ -1536,7 +1536,7 @@ flatten_exact_fam_app_fully tc tys</td>
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1536
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<pre style="margin: 0;"> <span id="LC1536" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">role</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eqRelRole</span> <span class="n" style="color: #333;">eq_rel</span></span>
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<pre style="margin: 0;"> <span id="LC1537" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">co</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkSymCo</span> <span class="p">(</span><span class="n" style="color: #333;">maybeTcSubCo</span> <span class="n" style="color: #333;">eq_rel</span> <span class="n" style="color: #333;">norm_co</span></span>
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1538
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1538
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<pre style="margin: 0;"> <span id="LC1538" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">mkTransCo</span><span class="p">`</span> <span class="n" style="color: #333;">mkSymCo</span> <span class="n" style="color: #333;">final_co</span><span class="p">)</span></span>
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1539
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<pre style="margin: 0;">-<span id="LC1539" class="line" lang="haskell"> <span class="n" style="color: #333;">co'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">mkZapped</span>Coercion</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">xi</span> <span class="n" style="color: #333;">fam_ty</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;">+<span id="LC1539" class="line" lang="haskell"> <span class="n" style="color: #333;">co'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">perhapsZap</span>Coercion</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">co</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Pair</span> <span class="n" style="color: #333;">xi</span> <span class="n" style="color: #333;">fam_ty</span><span class="p">)</span> <span class="n" style="color: #333;">role</span> <span class="n" style="color: #333;">fvs</span></span>
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<pre style="margin: 0;"> <span id="LC1540" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">--co' = co</span></span>
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1541
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<pre style="margin: 0;"> <span id="LC1541" class="line" lang="haskell"> <span class="p">;</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;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">xi</span><span class="p">,</span> <span class="n" style="color: #333;">co'</span><span class="p">)</span> <span class="p">}</span></span>
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1542
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1542
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<pre style="margin: 0;"> <span id="LC1542" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="p">}</span></span>
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<li id="367db94fc37c8c7548dbe545a5302c7a5108e41e">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/81578d45f7bb2cc84d153c8152a1e8faa9fd53b5...6a41b6b1fc23f2d0251cf7da634e9453a20810d0#367db94fc37c8c7548dbe545a5302c7a5108e41e"><strong>compiler/typecheck/TcMType.hs</strong></a>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="113" style="width: 35px; color: rgba(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="113" style="width: 35px; color: rgba(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">@@ -113,6 +113,7 @@ import TcRnMonad -- TcType, amongst others</td>
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113
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113
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<pre style="margin: 0;"> <span id="LC113" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Constraint</span></span>
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114
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<pre style="margin: 0;"> <span id="LC114" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">TcEvidence</span></span>
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<pre style="margin: 0;"> <span id="LC115" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Id</span></span>
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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">IdInfo</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IdDetails</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoercionHoleId</span><span class="p">))</span></span>
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116
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117
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<pre style="margin: 0;"> <span id="LC117" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Name</span></span>
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<pre style="margin: 0;"> <span id="LC118" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">VarSet</span></span>
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119
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<pre style="margin: 0;"> <span id="LC119" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">TysWiredIn</span></span>
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<td class="diff-line-num unfold js-unfold old_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">...</td>
<td class="diff-line-num unfold js-unfold 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">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -328,7 +329,7 @@ newCoercionHole :: BlockSubstFlag -- should the presence of this hole block sub</td>
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328
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329
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<pre style="margin: 0;"> <span id="LC329" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Note [Equalities with incompatible kinds]</span></span>
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329
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<pre style="margin: 0;"> <span id="LC330" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcPredType</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;">CoercionHole</span></span>
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330
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331
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<pre style="margin: 0;"> <span id="LC331" class="line" lang="haskell"><span class="n" style="color: #333;">newCoercionHole</span> <span class="n" style="color: #333;">blocker</span> <span class="n" style="color: #333;">pred_ty</span></span>
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331
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<pre style="margin: 0;">-<span id="LC331" 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;">co_var</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;"><span class="idiff left">newEvVar</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">pred_ty</span></span></span>
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<td class="diff-line-num new new_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">
332
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<pre style="margin: 0;">+<span id="LC332" 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;">co_var</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;"><span class="idiff left">fmap</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(`</span></span><span class="n" style="color: #333;"><span class="idiff">setIdDetails</span></span><span class="p"><span class="idiff">`</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoercionHoleId</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">newEvVar</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pred_ty</span></span><span class="p"><span class="idiff right">)</span></span></span>
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332
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333
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<pre style="margin: 0;"> <span id="LC333" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"New coercion hole:"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">co_var</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">blocker</span><span class="p">)</span></span>
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333
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334
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<pre style="margin: 0;"> <span id="LC334" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">ref</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newMutVar</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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334
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335
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<pre style="margin: 0;"> <span id="LC335" class="line" lang="haskell"> <span class="p">;</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;">CoercionHole</span> <span class="p">{</span> <span class="n" style="color: #333;">ch_co_var</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">co_var</span><span class="p">,</span> <span class="n" style="color: #333;">ch_blocker</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">blocker</span></span>
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