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<h3>
Richard Eisenberg pushed to branch wip/T18534
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d9081080bdd4617828f46a9a789ecc637056210b">d9081080</a></strong>
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<span>by Richard Eisenberg</span>
<i>at 2020-08-04T22:02:09-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fail eagerly on a lev-poly datacon arg
Close #18534.
See commentary in the patch.
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<h4>4 changed files:</h4>
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<a href="#83d23a46bb6cdc8b1edc16f1fd2c8f5c53e2c9ca">
compiler/GHC/Tc/TyCl.hs
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<a href="#896dfa0c13813de8c560c2b9d6d98b367ed0b12b">
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testsuite/tests/typecheck/should_fail/T18534.hs
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testsuite/tests/typecheck/should_fail/T18534.stderr
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<a href="#b9e86d897a62509b0114d81d5e736630d6f68f43">
testsuite/tests/typecheck/should_fail/all.T
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<h4>Changes:</h4>
<li id="83d23a46bb6cdc8b1edc16f1fd2c8f5c53e2c9ca">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d9081080bdd4617828f46a9a789ecc637056210b#83d23a46bb6cdc8b1edc16f1fd2c8f5c53e2c9ca"><strong>compiler/GHC/Tc/TyCl.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">@@ -74,7 +74,6 @@ import GHC.Types.SrcLoc</td>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.List.SetOps</span></span>
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<pre style="margin: 0;"> <span id="LC75" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Session</span></span>
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<pre style="margin: 0;"> <span id="LC76" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique</span></span>
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<pre style="margin: 0;">-<span id="LC77" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.ConLike</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">ConLike</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">)</span> <span class="p">)</span></span>
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78
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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Basic</span></span>
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<pre style="margin: 0;"> <span id="LC78" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">GHC.LanguageExtensions</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">LangExt</span></span>
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<pre style="margin: 0;"> <span id="LC79" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3819" 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="3818" 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">@@ -3819,15 +3818,14 @@ checkValidTyCl tc</td>
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<pre style="margin: 0;"> <span id="LC3818" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC3819" class="line" lang="haskell"> <span class="n" style="color: #333;">recovery_code</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Recover from validity error]</span></span>
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<pre style="margin: 0;"> <span id="LC3820" 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;">"Aborted validity for tycon"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC3822" 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;"><span class="idiff left right">concatM</span>ap</span> <span class="n" style="color: #333;">mk_fake_tc</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC3823" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">ATyCon</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tc</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">:</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">implicitTyConThing</span>s</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC3821" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left right">m</span>ap</span> <span class="n" style="color: #333;">mk_fake_tc</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC3822" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">tc</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">:</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">child_tycon</span>s</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC3823" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC3825" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_fake_tc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ATyCon</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC3826" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isClassTyCon</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="n" style="color: #333;">tc</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- Ugh! Note [Recover from validity error]</span></span>
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<pre style="margin: 0;">-<span id="LC3827" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="n" style="color: #333;">makeRecoveryTyCon</span> <span class="n" style="color: #333;">tc</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC3828" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_fake_tc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">AConLike</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">dc</span><span class="p">))</span></span>
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<pre style="margin: 0;">-<span id="LC3829" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="n" style="color: #333;">makeRecoveryTyCon</span> <span class="p">(</span><span class="n" style="color: #333;">promoteDataCon</span> <span class="n" style="color: #333;">dc</span><span class="p">)]</span></span>
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<pre style="margin: 0;">-<span id="LC3830" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_fake_tc</span> <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="LC3824" class="line" lang="haskell"> <span class="n" style="color: #333;">mk_fake_tc</span> <span class="n" style="color: #333;">tc</span></span>
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<pre style="margin: 0;">+<span id="LC3825" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isClassTyCon</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tc</span> <span class="c1" style="color: #998; font-style: italic;">-- Ugh! Note [Recover from validity error]</span></span>
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<pre style="margin: 0;">+<span id="LC3826" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">makeRecoveryTyCon</span> <span class="n" style="color: #333;">tc</span></span>
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<pre style="margin: 0;">+<span id="LC3827" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3828" class="line" lang="haskell"> <span class="n" style="color: #333;">child_tycons</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConATs</span> <span class="n" style="color: #333;">tc</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">promoteDataCon</span> <span class="p">(</span><span class="n" style="color: #333;">tyConDataCons</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC3829" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC3830" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Recover from validity error]</span></span>
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<pre style="margin: 0;"> <span id="LC3831" 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">@@ -3852,6 +3850,8 @@ Some notes:</td>
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<pre style="margin: 0;"> <span id="LC3850" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> and so there was an internal error when we met 'MkT' in the body of</span></span>
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3851
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<pre style="margin: 0;"> <span id="LC3851" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> 'S'.</span></span>
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<pre style="margin: 0;"> <span id="LC3852" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3853" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Similarly for associated types.</span></span>
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<pre style="margin: 0;">+<span id="LC3854" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC3855" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Painfully, we *don't* want to do this for classes.</span></span>
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3856
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<pre style="margin: 0;"> <span id="LC3856" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Consider tcfail041:</span></span>
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3857
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<pre style="margin: 0;"> <span id="LC3857" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> class (?x::Int) => C a where ...</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">@@ -3864,6 +3864,14 @@ Some notes:</td>
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3864
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<pre style="margin: 0;"> <span id="LC3864" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> This is really bogus; now we have in scope a Class that is invalid</span></span>
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3865
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<pre style="margin: 0;"> <span id="LC3865" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> in some way, with unknown downstream consequences. A better</span></span>
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3866
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3866
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<pre style="margin: 0;"> <span id="LC3866" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> alternative might be to make a fake class TyCon. A job for another day.</span></span>
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3867
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<pre style="margin: 0;">+<span id="LC3867" class="line" lang="haskell"></span>
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3868
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<pre style="margin: 0;">+<span id="LC3868" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Previously, we used implicitTyConThings to snaffle out the parts</span></span>
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3869
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<pre style="margin: 0;">+<span id="LC3869" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> to add to the context. The problem is that this also grabs data con</span></span>
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3870
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<pre style="margin: 0;">+<span id="LC3870" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> wrapper Ids. These could be filtered out. But, painfully, getting</span></span>
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3871
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<pre style="margin: 0;">+<span id="LC3871" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> the wrapper Ids checks the DataConRep, and forcing the DataConRep</span></span>
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3872
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<pre style="margin: 0;">+<span id="LC3872" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> can panic if there is a levity-polymorphic argument. This is #18534.</span></span>
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3873
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<pre style="margin: 0;">+<span id="LC3873" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> We don't need the wrapper Ids here anyway. So the code just takes what</span></span>
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3874
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<pre style="margin: 0;">+<span id="LC3874" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> it needs, via child_tycons.</span></span>
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3867
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3875
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<pre style="margin: 0;"> <span id="LC3875" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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3868
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3876
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<pre style="margin: 0;"> <span id="LC3876" class="line" lang="haskell"></span>
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3869
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3877
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<pre style="margin: 0;"> <span id="LC3877" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-------------------------</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="4050" 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>
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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">@@ -4050,8 +4058,13 @@ checkValidDataCon dflags existential_ok tc con</td>
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4050
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4058
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<pre style="margin: 0;"> <span id="LC4058" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- regardless of whether or not UnliftedNewtypes is enabled. A</span></span>
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4051
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4059
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<pre style="margin: 0;"> <span id="LC4059" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- later check in checkNewDataCon handles this, producing a</span></span>
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4052
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4060
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<pre style="margin: 0;"> <span id="LC4060" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- better error message than checkForLevPoly would.</span></span>
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4053
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<pre style="margin: 0;">-<span id="LC4053" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">unless</span> <span class="p">(</span><span class="n" style="color: #333;">isNewTyCon</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span></span>
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4054
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<pre style="margin: 0;">-<span id="LC4054" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">mapM_</span> <span class="p">(</span><span class="n" style="color: #333;">checkForLevPoly</span> <span class="n" style="color: #333;">empty</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">scaledThing</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">dataConOrigArgTys</span> <span class="n" style="color: #333;">con</span><span class="p">))</span></span>
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4061
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<pre style="margin: 0;">+<span id="LC4061" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">unless</span> <span class="p">(</span><span class="n" style="color: #333;">isNewTyCon</span> <span class="n" style="color: #333;">tc</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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4062
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<pre style="margin: 0;">+<span id="LC4062" class="line" lang="haskell"> <span class="n" style="color: #333;">checkNoErrs</span> <span class="o" style="font-weight: 600;">$</span></span>
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4063
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<pre style="margin: 0;">+<span id="LC4063" class="line" lang="haskell"> <span class="n" style="color: #333;">mapM_</span> <span class="p">(</span><span class="n" style="color: #333;">checkForLevPoly</span> <span class="n" style="color: #333;">empty</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">scaledThing</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">dataConOrigArgTys</span> <span class="n" style="color: #333;">con</span><span class="p">)</span></span>
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4064
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<pre style="margin: 0;">+<span id="LC4064" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- the checkNoErrs is to prevent a panic in isVanillaDataCon</span></span>
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<pre style="margin: 0;">+<span id="LC4065" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (called a a few lines down), which can fall over if there is a</span></span>
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<pre style="margin: 0;">+<span id="LC4066" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- bang on a levity-polymorphic argument. This is #18534,</span></span>
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<pre style="margin: 0;">+<span id="LC4067" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- typecheck/should_fail/T18534</span></span>
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<pre style="margin: 0;"> <span id="LC4068" class="line" lang="haskell"></span>
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4069
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<pre style="margin: 0;"> <span id="LC4069" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Extra checks for newtype data constructors. Importantly, these</span></span>
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4057
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4070
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<pre style="margin: 0;"> <span id="LC4070" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- checks /must/ come before the call to checkValidType below. This</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d9081080bdd4617828f46a9a789ecc637056210b#896dfa0c13813de8c560c2b9d6d98b367ed0b12b"><strong>testsuite/tests/typecheck/should_fail/T18534.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>
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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;">Test</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="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">Test</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Test</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">a</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d9081080bdd4617828f46a9a789ecc637056210b#932052c9f36152eee24f314693b6c1d7923f83ac"><strong>testsuite/tests/typecheck/should_fail/T18534.stderr</strong></a>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T18534.hs:7:27: error:</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext"> • A levity-polymorphic type is not allowed here:</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext"> Type: a</span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext"> Kind: TYPE r</span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext"> • In the definition of data constructor ‘Test’</span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext"> In the data type declaration for ‘Test’</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d9081080bdd4617828f46a9a789ecc637056210b#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">@@ -578,3 +578,4 @@ test('T18357', normal, compile_fail, [''])</td>
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578
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<pre style="margin: 0;"> <span id="LC578" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18357a</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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579
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<pre style="margin: 0;"> <span id="LC579" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18357b</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="LC580" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18455</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="LC581" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18534</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></pre>
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