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<h3>
Simon Peyton Jones pushed to branch wip/T18856
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f3d70111d1d69bf11ac374f4071cbd21a29b9d06">f3d70111</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-10-21T13:20:40+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix error message location in tcCheckPatSynDecl
Ticket #18856 showed that we were failing to set the right location
for an error message. Easy to fix, happily.
Turns out that this also improves the error location in test T11010,
which was bogus before but we had never noticed.
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<h4>5 changed files:</h4>
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<li class="file-stats">
<a href="#5c0a7f8291c984f0fc06f59e7cf10dbecc11598b">
compiler/GHC/Tc/TyCl/PatSyn.hs
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<li class="file-stats">
<a href="#31dd222895d4f077f4769c6b6b7302983c4402e7">
testsuite/tests/patsyn/should_fail/T11010.stderr
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<li class="file-stats">
<a href="#9af9a70eccd0ea98ceca0c7e7d42c5d3436eadb8">
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testsuite/tests/patsyn/should_fail/T18856.hs
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<li class="file-stats">
<a href="#2d3c29ed519f31649ec02ab5e480f33f24b27139">
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testsuite/tests/patsyn/should_fail/T18856.stderr
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<li class="file-stats">
<a href="#4c2e7bb43f7bc4d8c1f8f07f974b917d487c88fb">
testsuite/tests/patsyn/should_fail/all.T
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<h4>Changes:</h4>
<li id="5c0a7f8291c984f0fc06f59e7cf10dbecc11598b">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f3d70111d1d69bf11ac374f4071cbd21a29b9d06#5c0a7f8291c984f0fc06f59e7cf10dbecc11598b"><strong>compiler/GHC/Tc/TyCl/PatSyn.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">@@ -31,9 +31,9 @@ import GHC.Tc.Utils.TcMType</td>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Zonk</span></span>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Types.Prim</span></span>
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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Name</span></span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Name.Set</span></span>
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<pre style="margin: 0;"> <span id="LC35" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.SrcLoc</span></span>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.PatSyn</span></span>
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<pre style="margin: 0;">-<span id="LC36" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Name.Set</span></span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Panic</span></span>
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<pre style="margin: 0;"> <span id="LC38" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Outputable</span></span>
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<pre style="margin: 0;"> <span id="LC39" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.FastString</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">@@ -422,14 +422,22 @@ tcCheckPatSynDecl psb@PSB{ psb_id = lname@(L _ name), psb_args = details</td>
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<pre style="margin: 0;"> <span id="LC422" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tc_patsyn_finish</span> <span class="n" style="color: #333;">lname</span> <span class="n" style="color: #333;">dir</span> <span class="n" style="color: #333;">is_infix</span> <span class="n" style="color: #333;">lpat'</span></span>
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<pre style="margin: 0;"> <span id="LC423" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">univ_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">req_theta</span><span class="p">,</span> <span class="n" style="color: #333;">ev_binds</span><span class="p">,</span> <span class="n" style="color: #333;">req_dicts</span><span class="p">)</span></span>
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424
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<pre style="margin: 0;"> <span id="LC424" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">ex_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">mkTyVarTys</span> <span class="n" style="color: #333;">ex_tvs'</span><span class="p">,</span> <span class="n" style="color: #333;">prov_theta</span><span class="p">,</span> <span class="n" style="color: #333;">prov_dicts</span><span class="p">)</span></span>
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425
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<pre style="margin: 0;">-<span id="LC425" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">args'</span><span class="p">,</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">map</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">scaledThing</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">arg_tys</span></span><span class="p"><span class="idiff right">)</span>)</span></span>
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<pre style="margin: 0;">+<span id="LC425" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">args'</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left">map</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">scaledThing</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">arg_tys</span></span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC426" class="line" lang="haskell"> <span class="n" style="color: #333;">pat_ty</span> <span class="n" style="color: #333;">rec_fields</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC427" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC428" class="line" lang="haskell"> <span class="n" style="color: #333;">tc_arg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TCvSubst</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC429" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Look up the variable actually bound by lpat</span></span>
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<pre style="margin: 0;">+<span id="LC430" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- and check that it has the expected type</span></span>
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<pre style="margin: 0;"> <span id="LC431" class="line" lang="haskell"> <span class="n" style="color: #333;">tc_arg</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">arg_name</span> <span class="n" style="color: #333;">arg_ty</span></span>
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<pre style="margin: 0;">-<span id="LC430" 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="c1" style="color: #998; font-style: italic;">-- Look up the variable actually bound by lpat</span></span>
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<pre style="margin: 0;">-<span id="LC431" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- and check that it has the expected type</span></span>
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<pre style="margin: 0;">-<span id="LC432" class="line" lang="haskell"> <span class="n" style="color: #333;">arg_id</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcLookupId</span> <span class="n" style="color: #333;">arg_name</span></span>
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<pre style="margin: 0;">+<span id="LC432" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setSrcSpan</span> <span class="p">(</span><span class="n" style="color: #333;">nameSrcSpan</span> <span class="n" style="color: #333;">arg_name</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC433" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Set the SrcSpan to be the binding site of the Id (#18856)</span></span>
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<pre style="margin: 0;">+<span id="LC434" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- e.g. pattern P :: Int -> Maybe (Int,Bool)</span></span>
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<pre style="margin: 0;">+<span id="LC435" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- pattern P x = Just (x,True)</span></span>
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<pre style="margin: 0;">+<span id="LC436" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Before unifying x's actual type with its expected type, in tc_arg, set</span></span>
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<pre style="margin: 0;">+<span id="LC437" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- location to x's binding site in lpat, namely the 'x' in Just (x,True).</span></span>
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<pre style="margin: 0;">+<span id="LC438" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Else the error message location is wherever tcCheckPat finished,</span></span>
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<pre style="margin: 0;">+<span id="LC439" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- namely the right-hand corner of the pattern</span></span>
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<pre style="margin: 0;">+<span id="LC440" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">arg_id</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcLookupId</span> <span class="n" style="color: #333;">arg_name</span></span>
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<pre style="margin: 0;"> <span id="LC441" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">wrap</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcSubTypeSigma</span> <span class="kt" style="color: #458; font-weight: 600;">GenSigCtxt</span></span>
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<pre style="margin: 0;"> <span id="LC442" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">arg_id</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC443" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">substTyUnchecked</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f3d70111d1d69bf11ac374f4071cbd21a29b9d06#31dd222895d4f077f4769c6b6b7302983c4402e7"><strong>testsuite/tests/patsyn/should_fail/T11010.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">T11010.hs:9:3<span class="idiff left right">6</span>: error:</span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T11010.hs:9:3<span class="idiff left right">4</span>: error:</span>
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3
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="plaintext"> • Couldn't match type ‘a1’ with ‘Int’</span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="plaintext"> Expected: a -> b</span>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="plaintext"> Actual: a1 -> b</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">@@ -12,3 +12,6 @@ T11010.hs:9:36: error:</td>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="plaintext"> • Relevant bindings include</span>
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="plaintext"> x :: Expr a1 (bound at T11010.hs:9:36)</span>
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="plaintext"> f :: a1 -> b (bound at T11010.hs:9:34)</span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="plaintext"> |</span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="plaintext">9 | pattern IntFun str f x = Fun str f x</span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext"> | ^</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f3d70111d1d69bf11ac374f4071cbd21a29b9d06#9af9a70eccd0ea98ceca0c7e7d42c5d3436eadb8"><strong>testsuite/tests/patsyn/should_fail/T18856.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 PatternSynonyms, ViewPatterns #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T18856</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="n" style="color: #333;">pattern</span> <span class="kt" style="color: #458; font-weight: 600;">P</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">,</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)])</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="n" style="color: #333;">pattern</span> <span class="kt" style="color: #458; font-weight: 600;">P</span> <span class="n" style="color: #333;">p</span> <span class="n" style="color: #333;">q</span> <span class="o" style="font-weight: 600;"><-</span> <span class="p">(</span><span class="n" style="color: #333;">q</span><span class="p">,</span> <span class="n" style="color: #333;">p</span><span class="p">,</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)])</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"></span></pre>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T18856.hs:6:19: error:</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext"> • Couldn't match expected type ‘Bool’ with actual type ‘Int’</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext"> • In the declaration for pattern synonym ‘P’</span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext"> |</span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext">6 | pattern P p q <- (q, p, [(True,False)])</span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext"> | ^</span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="plaintext">T18856.hs:6:22: error:</span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="plaintext"> • Couldn't match expected type ‘Int’ with actual type ‘Bool’</span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext"> • In the declaration for pattern synonym ‘P’</span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="plaintext"> |</span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="plaintext">6 | pattern P p q <- (q, p, [(True,False)])</span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="plaintext"> | ^</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f3d70111d1d69bf11ac374f4071cbd21a29b9d06#4c2e7bb43f7bc4d8c1f8f07f974b917d487c88fb"><strong>testsuite/tests/patsyn/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">@@ -9,7 +9,7 @@ test('T9705-2', normal, compile_fail, [''])</td>
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">unboxed-bind</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">unboxed-wrapper-naked</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T10873</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;">-<span id="LC12" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T11010</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T11010</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;"><span class="idiff left right">-fdiagnostics-show-caret</span></span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">records-check-sels</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">records-no-uni-update</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">records-no-uni-update2</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</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">@@ -47,3 +47,4 @@ test('T15692', normal, compile, ['']) # It has -fdefer-type-errors inside</td>
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<pre style="margin: 0;"> <span id="LC47" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T15694</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16900</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-fdiagnostics-show-caret</span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T14552</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;">+<span id="LC50" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18856</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-fdiagnostics-show-caret</span><span class="p">'])</span></span></pre>
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