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<h3>
Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/f9d61ebbf4bba7862ae53c69b0f7116423b8f6d1">f9d61ebb</a></strong>
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<span>by Krzysztof Gogolewski</span>
<i>at 2019-05-29T14:39:05Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">In hole fits, don't show VTA for inferred variables (#16456)
We fetch the ArgFlag for every argument by using splitForAllVarBndrs
instead of splitForAllTys in unwrapTypeVars.
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<h4>6 changed files:</h4>
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<li class="file-stats">
<a href="#39f28d5dc8c176ea580515ffbadb8250289f1b7d">
compiler/typecheck/TcHoleErrors.hs
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<li class="file-stats">
<a href="#4a1b7af9d10ee4b2fc1b30ce578d96d039ff03f7">
testsuite/tests/printer/T14343.stderr
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<li class="file-stats">
<a href="#73b823df0b97c0159d0692acd05b2e3876000041">
testsuite/tests/printer/T14343b.stderr
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<li class="file-stats">
<a href="#e790dc1bb816d87181640acbc8931ea79df832cf">
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testsuite/tests/typecheck/should_fail/T16456.hs
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<li class="file-stats">
<a href="#39889bcdcd431edb4572c6b47e4a8b83e2fb892d">
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testsuite/tests/typecheck/should_fail/T16456.stderr
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<li class="file-stats">
<a href="#b9e86d897a62509b0114d81d5e736630d6f68f43">
testsuite/tests/typecheck/should_fail/all.T
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<h4>Changes:</h4>
<li id="39f28d5dc8c176ea580515ffbadb8250289f1b7d">
<a href="https://gitlab.haskell.org/ghc/ghc/commit/f9d61ebbf4bba7862ae53c69b0f7116423b8f6d1#39f28d5dc8c176ea580515ffbadb8250289f1b7d"><strong>compiler/typecheck/TcHoleErrors.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">@@ -516,21 +516,30 @@ pprHoleFit (HFDC sWrp sWrpVars sTy sProv sMs) hf = hang display 2 provenance</td>
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<pre style="margin: 0;"> <span id="LC516" class="line" lang="haskell"> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hfType</span> <span class="n" style="color: #333;">hf</span></span>
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<pre style="margin: 0;"> <span id="LC517" class="line" lang="haskell"> <span class="n" style="color: #333;">matches</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hfMatches</span> <span class="n" style="color: #333;">hf</span></span>
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<pre style="margin: 0;"> <span id="LC518" class="line" lang="haskell"> <span class="n" style="color: #333;">wrap</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hfWrap</span> <span class="n" style="color: #333;">hf</span></span>
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<pre style="margin: 0;">-<span id="LC519" class="line" lang="haskell"> <span class="n" style="color: #333;">tyApp</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sep</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">map</span> <span class="p">((</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"@"</span> <span class="o" style="font-weight: 600;"><></span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">pprParendType</span><span class="p">)</span> <span class="n" style="color: #333;">wrap</span></span>
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<pre style="margin: 0;">+<span id="LC519" class="line" lang="haskell"> <span class="n" style="color: #333;">tyApp</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sep</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">zipWithEqual</span> <span class="s" style="color: #d14;">"pprHoleFit"</span> <span class="n" style="color: #333;">pprArg</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">wrap</span></span>
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<pre style="margin: 0;">+<span id="LC520" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="n" style="color: #333;">pprArg</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">binderArgFlag</span> <span class="n" style="color: #333;">b</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC521" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Specified</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"@"</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">pprParendType</span> <span class="n" style="color: #333;">arg</span></span>
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<pre style="margin: 0;">+<span id="LC522" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Do not print type application for inferred</span></span>
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<pre style="margin: 0;">+<span id="LC523" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- variables (#16456)</span></span>
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<pre style="margin: 0;">+<span id="LC524" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Inferred</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">empty</span></span>
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<pre style="margin: 0;">+<span id="LC525" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Required</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"pprHoleFit: bad Required"</span></span>
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<pre style="margin: 0;">+<span id="LC526" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC527" class="line" lang="haskell"> <span class="n" style="color: #333;">tyAppVars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sep</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">comma</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC521" class="line" lang="haskell"> <span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="n" style="color: #333;">v</span><span class="p">,</span><span class="n" style="color: #333;">t</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"~"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">pprParendType</span> <span class="n" style="color: #333;">t</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC522" class="line" lang="haskell"> <span class="n" style="color: #333;">zip</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">wrap</span></span>
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<pre style="margin: 0;">+<span id="LC528" class="line" lang="haskell"> <span class="n" style="color: #333;">zipWithEqual</span> <span class="s" style="color: #d14;">"pprHoleFit"</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">binderVar</span> <span class="n" style="color: #333;">v</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><+></span></span>
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<pre style="margin: 0;">+<span id="LC529" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"~"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">pprParendType</span> <span class="n" style="color: #333;">t</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC530" class="line" lang="haskell"> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">wrap</span></span>
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<pre style="margin: 0;">+<span id="LC531" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC532" class="line" lang="haskell"> <span class="n" style="color: #333;">vars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unwrapTypeVars</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;"> <span id="LC533" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC524" class="line" lang="haskell"> <span class="n" style="color: #333;">vars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unwrapTypeVars</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;"> <span id="LC534" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Attempts to get all the quantified type variables in a type,</span></span>
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<pre style="margin: 0;"> <span id="LC535" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- e.g.</span></span>
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<pre style="margin: 0;">-<span id="LC527" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- return :: forall (m :: * -> *) Monad m => (forall a . a<span class="idiff left right">) -> m a</span></span></span>
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<pre style="margin: 0;">+<span id="LC536" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- return :: forall (m :: * -> *) Monad m => (forall a . a<span class="idiff left right"> -> m a)</span></span></span>
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<pre style="margin: 0;"> <span id="LC537" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- into [m, a]</span></span>
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<pre style="margin: 0;">-<span id="LC529" class="line" lang="haskell"> <span class="n" style="color: #333;">unwrapTypeVars</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Ty<span class="idiff left right">Va</span>r</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC538" class="line" lang="haskell"> <span class="n" style="color: #333;">unwrapTypeVars</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Ty<span class="idiff left right">CoVarBinde</span>r</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC539" class="line" lang="haskell"> <span class="n" style="color: #333;">unwrapTypeVars</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vars</span> <span class="o" style="font-weight: 600;">++</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">splitFunTy_maybe</span> <span class="n" style="color: #333;">unforalled</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC540" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">unfunned</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">unwrapTypeVars</span> <span class="n" style="color: #333;">unfunned</span></span>
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<pre style="margin: 0;"> <span id="LC541" 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;">[]</span></span>
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<pre style="margin: 0;">-<span id="LC533" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="p">(</span><span class="n" style="color: #333;">vars</span><span class="p">,</span> <span class="n" style="color: #333;">unforalled</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitForAll<span class="idiff left right">Ty</span>s</span> <span class="n" style="color: #333;">t</span></span>
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<pre style="margin: 0;">+<span id="LC542" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="p">(</span><span class="n" style="color: #333;">vars</span><span class="p">,</span> <span class="n" style="color: #333;">unforalled</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitForAll<span class="idiff left right">VarBndr</span>s</span> <span class="n" style="color: #333;">t</span></span>
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<pre style="margin: 0;"> <span id="LC543" class="line" lang="haskell"> <span class="n" style="color: #333;">holeVs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sep</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="n" style="color: #333;">parens</span> <span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"_"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">ppr</span><span class="p">)</span> <span class="n" style="color: #333;">matches</span></span>
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<pre style="margin: 0;"> <span id="LC544" class="line" lang="haskell"> <span class="n" style="color: #333;">holeDisp</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">sMs</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">holeVs</span></span>
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<pre style="margin: 0;"> <span id="LC545" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">sep</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">replicate</span> <span class="p">(</span><span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">matches</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"_"</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/commit/f9d61ebbf4bba7862ae53c69b0f7116423b8f6d1#4a1b7af9d10ee4b2fc1b30ce578d96d039ff03f7"><strong>testsuite/tests/printer/T14343.stderr</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">@@ -8,7 +8,7 @@ T14343.hs:10:9: error:</td>
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<pre style="margin: 0;"> <span id="LC8" class="line" lang="plaintext"> Valid hole fits include</span>
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="plaintext"> test1 :: Proxy '[ 'True] (defined at T14343.hs:10:1)</span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="plaintext"> Proxy :: forall k1 (k2 :: k1). Proxy k2</span>
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<pre style="margin: 0;">-<span id="LC11" class="line" lang="plaintext"> with Proxy @<span class="idiff left right">[Bool] @</span>'[ 'True]</span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext"> with Proxy @'[ 'True]</span>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="plaintext"> (defined at T14343.hs:8:16)</span>
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="plaintext">T14343.hs:11:9: error:</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">@@ -20,7 +20,7 @@ T14343.hs:11:9: error:</td>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="plaintext"> Valid hole fits include</span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="plaintext"> test2 :: Proxy '[ '[1]] (defined at T14343.hs:11:1)</span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="plaintext"> Proxy :: forall k1 (k2 :: k1). Proxy k2</span>
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<pre style="margin: 0;">-<span id="LC23" class="line" lang="plaintext"> with Proxy @<span class="idiff left right">[[GHC.Types.Nat]] @</span>'[ '[1]]</span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="plaintext"> with Proxy @'[ '[1]]</span>
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<pre style="margin: 0;"> <span id="LC24" class="line" lang="plaintext"> (defined at T14343.hs:8:16)</span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC26" class="line" lang="plaintext">T14343.hs:12:9: error:</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">@@ -32,5 +32,5 @@ T14343.hs:12:9: error:</td>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="plaintext"> Valid hole fits include</span>
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<pre style="margin: 0;"> <span id="LC33" class="line" lang="plaintext"> test3 :: Proxy '[ '("Symbol", 1)] (defined at T14343.hs:12:1)</span>
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<pre style="margin: 0;"> <span id="LC34" class="line" lang="plaintext"> Proxy :: forall k1 (k2 :: k1). Proxy k2</span>
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<pre style="margin: 0;">-<span id="LC35" class="line" lang="plaintext"> with Proxy @<span class="idiff left right">[(GHC.Types.Symbol, GHC.Types.Nat)] @</span>'[ '("Symbol", 1)]</span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="plaintext"> with Proxy @'[ '("Symbol", 1)]</span>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="plaintext"> (defined at T14343.hs:8:16)</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/commit/f9d61ebbf4bba7862ae53c69b0f7116423b8f6d1#73b823df0b97c0159d0692acd05b2e3876000041"><strong>testsuite/tests/printer/T14343b.stderr</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">@@ -8,7 +8,7 @@ T14343b.hs:10:9: error:</td>
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<pre style="margin: 0;"> <span id="LC8" class="line" lang="plaintext"> Valid hole fits include</span>
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="plaintext"> test1 :: Proxy '( 'True, 'False) (defined at T14343b.hs:10:1)</span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="plaintext"> Proxy :: forall k1 (k2 :: k1). Proxy k2</span>
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<pre style="margin: 0;">-<span id="LC11" class="line" lang="plaintext"> with Proxy @<span class="idiff left right">(Bool, Bool) @</span>'( 'True, 'False)</span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext"> with Proxy @'( 'True, 'False)</span>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="plaintext"> (defined at T14343b.hs:8:16)</span>
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="plaintext">T14343b.hs:11:9: error:</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">@@ -23,7 +23,7 @@ T14343b.hs:11:9: error:</td>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="plaintext"> test2 :: Proxy '( '( 'True, 'False), 'False)</span>
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<pre style="margin: 0;"> <span id="LC24" class="line" lang="plaintext"> (defined at T14343b.hs:11:1)</span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="plaintext"> Proxy :: forall k1 (k2 :: k1). Proxy k2</span>
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<pre style="margin: 0;">-<span id="LC26" class="line" lang="plaintext"> with Proxy @<span class="idiff left right">((Bool, Bool), Bool) @</span>'( '( 'True, 'False), 'False)</span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="plaintext"> with Proxy @'( '( 'True, 'False), 'False)</span>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="plaintext"> (defined at T14343b.hs:8:16)</span>
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="plaintext"></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="plaintext">T14343b.hs:12:9: error:</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">@@ -35,5 +35,5 @@ T14343b.hs:12:9: error:</td>
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<pre style="margin: 0;"> <span id="LC35" class="line" lang="plaintext"> Valid hole fits include</span>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="plaintext"> test3 :: Proxy '( '[1], 'False) (defined at T14343b.hs:12:1)</span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="plaintext"> Proxy :: forall k1 (k2 :: k1). Proxy k2</span>
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<pre style="margin: 0;">-<span id="LC38" class="line" lang="plaintext"> with Proxy @<span class="idiff left right">([GHC.Types.Nat], Bool) @</span>'( '[1], 'False)</span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="plaintext"> with Proxy @'( '[1], 'False)</span>
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<pre style="margin: 0;"> <span id="LC39" class="line" lang="plaintext"> (defined at T14343b.hs:8:16)</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/commit/f9d61ebbf4bba7862ae53c69b0f7116423b8f6d1#e790dc1bb816d87181640acbc8931ea79df832cf"><strong>testsuite/tests/typecheck/should_fail/T16456.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE PolyKinds #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T16456</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">T</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkT</span></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="n" style="color: #333;">foo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">T</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="n" style="color: #333;">foo</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">_</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/commit/f9d61ebbf4bba7862ae53c69b0f7116423b8f6d1#39889bcdcd431edb4572c6b47e4a8b83e2fb892d"><strong>testsuite/tests/typecheck/should_fail/T16456.stderr</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T16456.hs:7:7: error:</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext"> • Found hole: _ :: T Int</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext"> • In the expression: _</span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext"> In an equation for ‘foo’: foo = _</span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext"> • Relevant bindings include foo :: T Int (bound at T16456.hs:7:1)</span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext"> Valid hole fits include</span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="plaintext"> foo :: T Int (bound at T16456.hs:7:1)</span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="plaintext"> MkT :: forall {k} (p :: k). T p</span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="plaintext"> with MkT @Int</span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext"> (defined at T16456.hs:4:12)</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/commit/f9d61ebbf4bba7862ae53c69b0f7116423b8f6d1#b9e86d897a62509b0114d81d5e736630d6f68f43"><strong>testsuite/tests/typecheck/should_fail/all.T</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -514,5 +514,6 @@ test('T16255', normal, compile_fail, [''])</td>
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<pre style="margin: 0;"> <span id="LC514" class="line" lang="perl"><span class="s" style="color: #d14;">test('</span><span class="nv" style="color: #008080;">T16204c</span><span class="s" style="color: #d14;">', normal, compile_fail, [''])</span></span>
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<pre style="margin: 0;"> <span id="LC515" class="line" lang="perl"><span class="s" style="color: #d14;">test('</span><span class="nv" style="color: #008080;">T16394</span><span class="s" style="color: #d14;">', normal, compile_fail, [''])</span></span>
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<pre style="margin: 0;"> <span id="LC516" class="line" lang="perl"><span class="s" style="color: #d14;">test('</span><span class="nv" style="color: #008080;">T16414</span><span class="s" style="color: #d14;">', normal, compile_fail, [''])</span></span>
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<pre style="margin: 0;">+<span id="LC517" class="line" lang="perl"><span class="s" style="color: #d14;">test('</span><span class="nv" style="color: #008080;">T16456</span><span class="s" style="color: #d14;">', normal, compile_fail, ['</span><span class="o" style="font-weight: 600;">-</span><span class="nv" style="color: #008080;">fprint</span><span class="o" style="font-weight: 600;">-</span><span class="nv" style="color: #008080;">explicit</span><span class="o" style="font-weight: 600;">-</span><span class="nv" style="color: #008080;">foralls</span><span class="s" style="color: #d14;">'])</span></span>
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517
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<pre style="margin: 0;"> <span id="LC518" class="line" lang="perl"><span class="s" style="color: #d14;">test('</span><span class="nv" style="color: #008080;">T16627</span><span class="s" style="color: #d14;">', normal, compile_fail, [''])</span></span>
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519
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<pre style="margin: 0;"> <span id="LC519" class="line" lang="perl"><span class="s" style="color: #d14;">test('</span><span class="nv" style="color: #008080;">T502</span><span class="s" style="color: #d14;">', normal, compile_fail, ['</span><span class="err" style="color: #a61717; background-color: #e3d2d2;">'</span><span class="p">])</span></span></pre>
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