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Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/59a07641090eec9dcaf5af97026b94911ca3191c">59a07641</a></strong>
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<span>by Richard Eisenberg</span>
<i>at 2020-12-18T05:55:33-05:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Cite "Kind Inference for Datatypes"
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<h4>1 changed file:</h4>
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compiler/GHC/Tc/Utils/TcMType.hs
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<h4>Changes:</h4>
<li id="94c96afe1bb3b771ffbcfeeca34ce43ebbe76ccb">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/59a07641090eec9dcaf5af97026b94911ca3191c#94c96afe1bb3b771ffbcfeeca34ce43ebbe76ccb"><strong>compiler/GHC/Tc/Utils/TcMType.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">@@ -1229,6 +1229,9 @@ We do this eager erroring in candidateQTyVars, which always precedes</td>
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<pre style="margin: 0;"> <span id="LC1229" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">generalisation, because at that moment we have a clear picture of what</span></span>
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<pre style="margin: 0;"> <span id="LC1230" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">skolems are in scope within the type itself (e.g. that 'forall arg').</span></span>
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<pre style="margin: 0;"> <span id="LC1231" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1232" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This change is inspired by and described in Section 7.2 of "Kind Inference</span></span>
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<pre style="margin: 0;">+<span id="LC1233" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">for Datatypes", POPL'20.</span></span>
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<pre style="margin: 0;">+<span id="LC1234" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1235" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Wrinkle:</span></span>
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<pre style="margin: 0;"> <span id="LC1236" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1237" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We must make absolutely sure that alpha indeed is not</span></span>
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