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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>
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8bdc03d61cb7a2f96887c86bd0b253f7c108fcde">8bdc03d6</a></strong>
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<span>by Simon Peyton Jones</span>
<i>at 2020-05-04T01:56:59-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Don't return a panic in tcNestedSplice
In GHC.Tc.Gen.Splice.tcNestedSplice we were returning a
typechecked expression of "panic". That is usually OK, because
the result is discarded. But it happens that tcApp now looks at
the typechecked expression, trivially, to ask if it is tagToEnum.
So being bottom is bad.
Moreover a debug-trace might print it out.
So better to return a civilised expression, even though it is
usually discarded.
</pre>
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<h4>4 changed files:</h4>
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<li class="file-stats">
<a href="#902811828741e6bcd64702935bbb54edbbd070ef">
compiler/GHC/Tc/Gen/Expr.hs
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<li class="file-stats">
<a href="#9ea832ccdb4b5f7508a1efd6caedeafa16b269e7">
compiler/GHC/Tc/Gen/Splice.hs
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<li class="file-stats">
<a href="#a9e71d5ec5a1ec7dbf17d99f2df2caeeb0f30eb8">
<span class="new-file">
+
testsuite/tests/th/T18121.hs
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<li class="file-stats">
<a href="#6f885f60b8c0fea6b94dd73a67d02212eedb4498">
testsuite/tests/th/all.T
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<h4>Changes:</h4>
<li id="902811828741e6bcd64702935bbb54edbbd070ef">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8bdc03d61cb7a2f96887c86bd0b253f7c108fcde#902811828741e6bcd64702935bbb54edbbd070ef"><strong>compiler/GHC/Tc/Gen/Expr.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">@@ -981,12 +981,9 @@ tcExpr (HsSpliceE _ (HsSpliced _ mod_finalizers (HsSplicedExpr expr)))</td>
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<pre style="margin: 0;"> <span id="LC981" class="line" lang="haskell"> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;"> <span id="LC982" 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;">addModFinalizersWithLclEnv</span> <span class="n" style="color: #333;">mod_finalizers</span></span>
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<pre style="margin: 0;"> <span id="LC983" class="line" lang="haskell"> <span class="n" style="color: #333;">tcExpr</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC984" class="line" lang="haskell"><span class="n" style="color: #333;">tcExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsSpliceE</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">splice</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span></span>
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985
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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="n" style="color: #333;">tcSpliceExpr</span> <span class="n" style="color: #333;">splice</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC986" class="line" lang="haskell"><span class="n" style="color: #333;">tcExpr</span> <span class="n" style="color: #333;">e</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsBracket</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">brack</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC987" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcTypedBracket</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">brack</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC988" class="line" lang="haskell"><span class="n" style="color: #333;">tcExpr</span> <span class="n" style="color: #333;">e</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsRnBracketOut</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">brack</span> <span class="n" style="color: #333;">ps</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span></span>
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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="n" style="color: #333;">tcUntypedBracket</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">brack</span> <span class="n" style="color: #333;">ps</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">+<span id="LC984" class="line" lang="haskell"><span class="n" style="color: #333;">tcExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsSpliceE</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">splice</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcSpliceExpr</span> <span class="n" style="color: #333;">splice</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">+<span id="LC985" class="line" lang="haskell"><span class="n" style="color: #333;">tcExpr</span> <span class="n" style="color: #333;">e</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsBracket</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">brack</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcTypedBracket</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">brack</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;">+<span id="LC986" class="line" lang="haskell"><span class="n" style="color: #333;">tcExpr</span> <span class="n" style="color: #333;">e</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsRnBracketOut</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">brack</span> <span class="n" style="color: #333;">ps</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcUntypedBracket</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">brack</span> <span class="n" style="color: #333;">ps</span> <span class="n" style="color: #333;">res_ty</span></span>
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<pre style="margin: 0;"> <span id="LC987" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC988" 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="LC989" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</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">@@ -1219,7 +1216,11 @@ tcApp expr res_ty</td>
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<pre style="margin: 0;"> <span id="LC1216" 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="p">(</span><span class="n" style="color: #333;">fun</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">app_res_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInferApp</span> <span class="n" style="color: #333;">expr</span></span>
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1220
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1217
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<pre style="margin: 0;"> <span id="LC1217" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">isTagToEnum</span> <span class="n" style="color: #333;">fun</span></span>
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1221
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1218
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<pre style="margin: 0;"> <span id="LC1218" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">tcTagToEnum</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span> <span class="n" style="color: #333;">app_res_ty</span> <span class="n" style="color: #333;">res_ty</span></span>
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1222
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<td class="diff-line-num new_line old" data-linenumber="1219" 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="LC1222" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="c1" style="color: #998; font-style: italic;">-- The wildly common case</span></span>
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1219
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<pre style="margin: 0;">+<span id="LC1219" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Done here because we have res_ty,</span></span>
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1220
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<pre style="margin: 0;">+<span id="LC1220" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- whereas tcInferApp does not</span></span>
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1221
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<pre style="margin: 0;">+<span id="LC1221" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span></span>
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1222
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<pre style="margin: 0;">+<span id="LC1222" class="line" lang="haskell"></span>
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1223
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<pre style="margin: 0;">+<span id="LC1223" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The wildly common case</span></span>
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1223
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1224
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<pre style="margin: 0;"> <span id="LC1224" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">expr'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">applyHsArgs</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">args</span></span>
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1224
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1225
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<pre style="margin: 0;"> <span id="LC1225" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">addFunResCtxt</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="n" style="color: #333;">fun</span> <span class="n" style="color: #333;">app_res_ty</span> <span class="n" style="color: #333;">res_ty</span> <span class="o" style="font-weight: 600;">$</span></span>
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1225
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1226
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<pre style="margin: 0;"> <span id="LC1226" class="line" lang="haskell"> <span class="n" style="color: #333;">tcWrapResult</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">expr'</span> <span class="n" style="color: #333;">app_res_ty</span> <span class="n" style="color: #333;">res_ty</span> <span class="p">}</span> <span class="p">}</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1232" 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="1233" 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">@@ -1232,10 +1233,10 @@ tcInferApp :: HsExpr GhcRn</td>
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1232
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1233
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<pre style="margin: 0;"> <span id="LC1233" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Also used by Module.tcRnExpr to implement GHCi :type</span></span>
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1233
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1234
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<pre style="margin: 0;"> <span id="LC1234" class="line" lang="haskell"><span class="n" style="color: #333;">tcInferApp</span> <span class="n" style="color: #333;">expr</span></span>
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1234
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1235
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<pre style="margin: 0;"> <span id="LC1235" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="c1" style="color: #998; font-style: italic;">-- Gruesome special case for ambiguous record selectors</span></span>
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1235
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<pre style="margin: 0;">-<span id="LC1235" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsRecFld</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">fld_lbl</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">fun</span></span>
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1236
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<pre style="margin: 0;">-<span id="LC1236" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Ambiguous</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">lbl</span> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">fld_lbl</span> <span class="c1" style="color: #998; font-style: italic;">-- Still ambiguous</span></span>
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1236
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<pre style="margin: 0;">+<span id="LC1236" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsRecFld</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">fld_lbl</span> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">fun</span></span>
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1237
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<pre style="margin: 0;">+<span id="LC1237" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Ambiguous</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">lbl</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">fld_lbl</span> <span class="c1" style="color: #998; font-style: italic;">-- Still ambiguous</span></span>
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1237
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1238
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<pre style="margin: 0;"> <span id="LC1238" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">HsEValArg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</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;">arg</span><span class="p">)</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">filterOut</span> <span class="n" style="color: #333;">isArgPar</span> <span class="n" style="color: #333;">args</span> <span class="c1" style="color: #998; font-style: italic;">-- A value arg is first</span></span>
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1238
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<pre style="margin: 0;">-<span id="LC1238" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">sig_ty</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">obviousSig</span> <span class="n" style="color: #333;">arg</span> <span class="c1" style="color: #998; font-style: italic;">-- A type sig on the arg disambiguates</span></span>
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1239
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<pre style="margin: 0;">+<span id="LC1239" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">sig_ty</span> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">obviousSig</span> <span class="n" style="color: #333;">arg</span> <span class="c1" style="color: #998; font-style: italic;">-- A type sig on the arg disambiguates</span></span>
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1239
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1240
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<pre style="margin: 0;"> <span id="LC1240" 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;">sig_tc_ty</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsSigWcType</span> <span class="kt" style="color: #458; font-weight: 600;">ExprSigCtxt</span> <span class="n" style="color: #333;">sig_ty</span></span>
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1240
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1241
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<pre style="margin: 0;"> <span id="LC1241" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">sel_name</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">disambiguateSelector</span> <span class="n" style="color: #333;">lbl</span> <span class="n" style="color: #333;">sig_tc_ty</span></span>
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1241
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1242
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<pre style="margin: 0;"> <span id="LC1242" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">tc_fun</span><span class="p">,</span> <span class="n" style="color: #333;">fun_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInferRecSelId</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Unambiguous</span> <span class="n" style="color: #333;">sel_name</span> <span class="n" style="color: #333;">lbl</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">@@ -1259,11 +1260,7 @@ tcInferApp_finish</td>
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1259
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1260
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<pre style="margin: 0;"> <span id="LC1260" class="line" lang="haskell"> <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;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LHsExprArgOut</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">TcSigmaType</span><span class="p">)</span></span>
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1260
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1261
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<pre style="margin: 0;"> <span id="LC1261" class="line" lang="haskell"></span>
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1261
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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;">tcInferApp_finish</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">tc_fun</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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1262
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<pre style="margin: 0;">-<span id="LC1262" 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;">traceTc</span> <span class="s" style="color: #d14;">"tcInferApp_finish"</span> <span class="o" style="font-weight: 600;">$</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;">vcat</span> <span class="p">[</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_fun</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="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fun_sigma</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rn_args</span> <span class="p">]</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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1265
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<pre style="margin: 0;">-<span id="LC1265" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">tc_args</span><span class="p">,</span> <span class="n" style="color: #333;">actual_res_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcArgs</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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1266
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<pre style="margin: 0;">-<span id="LC1266" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1263" 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="p">(</span><span class="n" style="color: #333;">tc_args</span><span class="p">,</span> <span class="n" style="color: #333;">actual_res_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcArgs</span> <span class="n" style="color: #333;">rn_fun</span> <span class="n" style="color: #333;">fun_sigma</span> <span class="n" style="color: #333;">rn_args</span></span>
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1264
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<pre style="margin: 0;"> <span id="LC1264" 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;">tc_fun</span><span class="p">,</span> <span class="n" style="color: #333;">tc_args</span><span class="p">,</span> <span class="n" style="color: #333;">actual_res_ty</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC1265" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1266" class="line" lang="haskell"><span class="n" style="color: #333;">mk_op_msg</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>
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<li id="9ea832ccdb4b5f7508a1efd6caedeafa16b269e7">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8bdc03d61cb7a2f96887c86bd0b253f7c108fcde#9ea832ccdb4b5f7508a1efd6caedeafa16b269e7"><strong>compiler/GHC/Tc/Gen/Splice.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">@@ -625,7 +625,13 @@ tcNestedSplice pop_stage (TcPending ps_var lie_var q@(QuoteWrapper _ m_var)) spl</td>
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<pre style="margin: 0;"> <span id="LC625" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">writeMutVar</span> <span class="n" style="color: #333;">ps_var</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PendingTcSplice</span> <span class="n" style="color: #333;">splice_name</span> <span class="n" style="color: #333;">expr''</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">ps</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC626" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC627" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The returned expression is ignored; it's in the pending splices</span></span>
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<pre style="margin: 0;">-<span id="LC628" 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;">panic</span> <span class="s" style="color: #d14;">"tcSpliceExpr"</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC628" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- But we still return a plausible expression</span></span>
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<pre style="margin: 0;">+<span id="LC629" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (a) in case we print it in debug messages, and</span></span>
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<pre style="margin: 0;">+<span id="LC630" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (b) because we test whether it is tagToEnum in Tc.Gen.Expr.tcApp</span></span>
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<pre style="margin: 0;">+<span id="LC631" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsSpliceE</span> <span class="n" style="color: #333;">noExtField</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC632" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsSpliced</span> <span class="n" style="color: #333;">noExtField</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ThModFinalizers</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC633" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsSplicedExpr</span> <span class="p">(</span><span class="n" style="color: #333;">unLoc</span> <span class="n" style="color: #333;">expr''</span><span class="p">))</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC634" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC635" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC636" class="line" lang="haskell"><span class="n" style="color: #333;">tcNestedSplice</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">splice_name</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span></span>
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<pre style="margin: 0;"> <span id="LC637" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"tcNestedSplice: rename stage found"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">splice_name</span><span class="p">)</span></span>
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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 TemplateHaskell #-}</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;">Bug</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;">import</span> <span class="nn" style="color: #555;">Language.Haskell.TH</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;">sapply</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Q</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TExp</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span><span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Q</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TExp</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Q</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TExp</span> <span class="n" style="color: #333;">b</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="n" style="color: #333;">sapply</span> <span class="n" style="color: #333;">cf</span> <span class="n" style="color: #333;">cx</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="o" style="font-weight: 600;">||</span> <span class="o" style="font-weight: 600;">$$</span><span class="n" style="color: #333;">cf</span> <span class="o" style="font-weight: 600;">$$</span><span class="n" style="color: #333;">cx</span> <span class="o" style="font-weight: 600;">||</span><span class="p">]</span></span></pre>
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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">@@ -506,3 +506,4 @@ test('T18097', normal, compile, [''])</td>
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506
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<pre style="margin: 0;"> <span id="LC506" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">TH_PprStar</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="s1" style="color: #d14;">-v0 -dsuppress-uniques</span><span class="p">'])</span></span>
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507
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507
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<pre style="margin: 0;"> <span id="LC507" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">TH_StringLift</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>
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508
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508
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<pre style="margin: 0;"> <span id="LC508" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">TH_BytesShowEqOrd</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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509
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<pre style="margin: 0;">+<span id="LC509" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18121</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></pre>
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