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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:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/0eeb4cfad732d0b9b278c2274cb6db9633f9d3b5">0eeb4cfa</a></strong>
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<span>by Ryan Scott</span>
<i>at 2019-05-08T06:01:54Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix #16632 by using the correct SrcSpan in checkTyClHdr
`checkTyClHdr`'s case for `HsTyVar` was grabbing the wrong `SrcSpan`,
which lead to error messages pointing to the wrong location. Easily
fixed.
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<h4>4 changed files:</h4>
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<li class="file-stats">
<a href="#f68eb03961d8e370e8d3f41bd51ea01fd168779e">
compiler/parser/RdrHsSyn.hs
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<a href="#1682cffc700de3dbb563b7f05fe97b7204f1a282">
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+
testsuite/tests/indexed-types/should_compile/T16632.hs
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testsuite/tests/indexed-types/should_compile/T16632.stderr
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<a href="#58b9bc2ffb1c7d7b545e6aada524a5d53266e95e">
testsuite/tests/indexed-types/should_compile/all.T
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<h4>Changes:</h4>
<li id="f68eb03961d8e370e8d3f41bd51ea01fd168779e">
<a href="https://gitlab.haskell.org/ghc/ghc/commit/0eeb4cfad732d0b9b278c2274cb6db9633f9d3b5#f68eb03961d8e370e8d3f41bd51ea01fd168779e"><strong>compiler/parser/RdrHsSyn.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">@@ -955,8 +955,8 @@ checkTyClHdr is_cls ty</td>
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<pre style="margin: 0;"> <span id="LC955" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkOccName</span> <span class="n" style="color: #333;">tcClsName</span> <span class="p">(</span><span class="n" style="color: #333;">starSym</span> <span class="n" style="color: #333;">isUni</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC956" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">cL</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Unqual</span> <span class="n" style="color: #333;">name</span><span class="p">),</span> <span class="n" style="color: #333;">acc</span><span class="p">,</span> <span class="n" style="color: #333;">fix</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">ann</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">mkParensApiAnn</span> <span class="n" style="color: #333;">lp</span><span class="p">))</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC957" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC958" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;"><span class="idiff left">l</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">HsTyVar</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff right"> </span><span class="p">(</span><span class="n" style="color: #333;">dL</span><span class="o" style="font-weight: 600;">-></span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tc</span><span class="p">))</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">ann</span> <span class="n" style="color: #333;">fix</span></span>
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<pre style="margin: 0;">-<span id="LC959" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isRdrTc</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left">cL</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">l</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">tc</span><span class="p">,</span> <span class="n" style="color: #333;">acc</span><span class="p">,</span> <span class="n" style="color: #333;">fix</span><span class="p">,</span> <span class="n" style="color: #333;">ann</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC958" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;"><span class="idiff left">_</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">HsTyVar</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ltc</span></span><span class="o" style="font-weight: 600;"><span class="idiff right">@</span></span><span class="p">(</span><span class="n" style="color: #333;">dL</span><span class="o" style="font-weight: 600;">-></span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tc</span><span class="p">))</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">ann</span> <span class="n" style="color: #333;">fix</span></span>
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<pre style="margin: 0;">+<span id="LC959" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isRdrTc</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left right">l</span>tc</span><span class="p">,</span> <span class="n" style="color: #333;">acc</span><span class="p">,</span> <span class="n" style="color: #333;">fix</span><span class="p">,</span> <span class="n" style="color: #333;">ann</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC960" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsOpTy</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">ltc</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">dL</span><span class="o" style="font-weight: 600;">-></span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span> <span class="n" style="color: #333;">t2</span><span class="p">)</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">ann</span> <span class="n" style="color: #333;">_fix</span></span>
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<pre style="margin: 0;"> <span id="LC961" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isRdrTc</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">ltc</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">HsValArg</span> <span class="n" style="color: #333;">t1</span><span class="o" style="font-weight: 600;">:</span><span class="kt" style="color: #458; font-weight: 600;">HsValArg</span> <span class="n" style="color: #333;">t2</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">acc</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Infix</span><span class="p">,</span> <span class="n" style="color: #333;">ann</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC962" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsParTy</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="n" style="color: #333;">acc</span> <span class="n" style="color: #333;">ann</span> <span class="n" style="color: #333;">fix</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">goL</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">acc</span> <span class="p">(</span><span class="n" style="color: #333;">ann</span> <span class="o" style="font-weight: 600;">++</span><span class="n" style="color: #333;">mkParensApiAnn</span> <span class="n" style="color: #333;">l</span><span class="p">)</span> <span class="n" style="color: #333;">fix</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/commit/0eeb4cfad732d0b9b278c2274cb6db9633f9d3b5#1682cffc700de3dbb563b7f05fe97b7204f1a282"><strong>testsuite/tests/indexed-types/should_compile/T16632.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 TypeFamilies #-}</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;">T16632</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;">type</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">F</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <span class="n" style="color: #333;">c</span></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">F</span> <span class="kt" style="color: #458; font-weight: 600;">Char</span> <span class="n" style="color: #333;">b</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">=</span> <span class="nb" style="color: #0086b3;">()</span></span></pre>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T16632.hs:5:22: warning: [-Wunused-type-patterns]</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext"> Defined but not used on the right hand side: type variable ‘b’</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext"> |</span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">5 | type instance F Char b Int = ()</span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext"> | ^</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/commit/0eeb4cfad732d0b9b278c2274cb6db9633f9d3b5#58b9bc2ffb1c7d7b545e6aada524a5d53266e95e"><strong>testsuite/tests/indexed-types/should_compile/all.T</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -286,3 +286,4 @@ test('T15711', normal, compile, ['-ddump-types'])</td>
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<pre style="margin: 0;"> <span id="LC286" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T15852'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">'-ddump-types'</span><span class="p">])</span></span>
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287
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<pre style="margin: 0;"> <span id="LC287" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T15764a'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>
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288
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<pre style="margin: 0;"> <span id="LC288" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T15740a'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">''</span><span class="p">])</span></span>
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<pre style="margin: 0;">+<span id="LC289" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T16632'</span><span class="p">,</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">'-Wunused-type-patterns -fdiagnostics-show-caret'</span><span class="p">])</span></span></pre>
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