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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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<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/bb929009523a20271e1af34990e5c85d440de0d7">bb929009</a></strong>
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<span>by Ömer Sinan Ağacan</span>
<i>at 2019-05-31T06:00:40Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix arity type of coerced types in CoreArity
Previously if we had
f |> co
where `f` had arity type `ABot N` and `co` had arity M and M < N,
`arityType` would return `ABot M` which is wrong, because `f` is only
known to diverge when applied to `N` args, as described in Note
[ArityType]:
If at = ABot n, then (f x1..xn) definitely diverges. Partial
applications to fewer than n args may *or may not* diverge.
This caused incorrect eta expansion in the simplifier, causing #16066.
We now return `ATop M` for the same expression so the simplifier can't
assume partial applications of `f |> co` is divergent.
A regression test T16066 is also added.
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<h4>4 changed files:</h4>
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<a href="#ed7e37ad33aa047f1f6bc74d375c38e6484b231c">
compiler/coreSyn/CoreArity.hs
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<a href="#bb0f086637db8a28c29f2e288c03bc888ac44926">
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+
testsuite/tests/simplCore/should_run/T16066.hs
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testsuite/tests/simplCore/should_run/T16066.stderr
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<li class="file-stats">
<a href="#03e40b9006a3cfc01e112fe32513b15c8634f9bc">
testsuite/tests/simplCore/should_run/all.T
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<h4>Changes:</h4>
<li id="ed7e37ad33aa047f1f6bc74d375c38e6484b231c">
<a href="https://gitlab.haskell.org/ghc/ghc/commit/bb929009523a20271e1af34990e5c85d440de0d7#ed7e37ad33aa047f1f6bc74d375c38e6484b231c"><strong>compiler/coreSyn/CoreArity.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">@@ -11,7 +11,7 @@</td>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"><span class="cd">-- | Arity and eta expansion</span></span>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">CoreArity</span> <span class="p">(</span></span>
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">manifestArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">joinRhsArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">exprArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">typeArity</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC14" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">exprEtaExpandArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">findRhsArity</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">CheapFun</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff right"> </span><span class="nf" style="color: #900; font-weight: 600;">etaExpand</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">exprEtaExpandArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">findRhsArity</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpand</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">etaExpandToJoinPoint</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">etaExpandToJoinPointRule</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">exprBotStrictness_maybe</span></span>
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"> <span class="p">)</span> <span class="kr" style="font-weight: 600;">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">@@ -702,6 +702,28 @@ lambda wasn't one-shot we don't want to do this.</td>
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<pre style="margin: 0;"> <span id="LC702" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC703" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So we combine the best of the two branches, on the (slightly dodgy)</span></span>
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<pre style="margin: 0;"> <span id="LC704" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">basis that if we know one branch is one-shot, then they all must be.</span></span>
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<pre style="margin: 0;">+<span id="LC705" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC706" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Arity trimming]</span></span>
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<pre style="margin: 0;">+<span id="LC707" 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="LC708" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider ((\x y. blah) |> co), where co :: (Int->Int->Int) ~ (Int -> F a) , and</span></span>
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<pre style="margin: 0;">+<span id="LC709" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">F is some type family.</span></span>
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<pre style="margin: 0;">+<span id="LC710" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC711" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Because of Note [exprArity invariant], item (2), we must return with arity at</span></span>
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<pre style="margin: 0;">+<span id="LC712" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">most 1, because typeArity (Int -> F a) = 1. So we have to trim the result of</span></span>
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<pre style="margin: 0;">+<span id="LC713" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">calling arityType on (\x y. blah). Failing to do so, and hence breaking the</span></span>
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<pre style="margin: 0;">+<span id="LC714" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">exprArity invariant, led to #5441.</span></span>
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<pre style="margin: 0;">+<span id="LC715" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC716" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">How to trim? For ATop, it's easy. But we must take great care with ABot.</span></span>
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<pre style="margin: 0;">+<span id="LC717" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Suppose the expression was (\x y. error "urk"), we'll get (ABot 2). We</span></span>
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<pre style="margin: 0;">+<span id="LC718" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">absolutely must not trim that to (ABot 1), because that claims that</span></span>
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<pre style="margin: 0;">+<span id="LC719" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">((\x y. error "urk") |> co) diverges when given one argument, which it</span></span>
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<pre style="margin: 0;">+<span id="LC720" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">absolutely does not. And Bad Things happen if we think something returns bottom</span></span>
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<pre style="margin: 0;">+<span id="LC721" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">when it doesn't (#16066).</span></span>
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<pre style="margin: 0;">+<span id="LC722" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC723" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So, do not reduce the 'n' in (ABot n); rather, switch (conservatively) to ATop.</span></span>
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<pre style="margin: 0;">+<span id="LC724" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC725" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Historical note: long ago, we unconditionally switched to ATop when we</span></span>
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<pre style="margin: 0;">+<span id="LC726" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">encountered a cast, but that is far too conservative: see #5475</span></span>
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<pre style="margin: 0;"> <span id="LC727" 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="LC728" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC729" class="line" lang="haskell"><span class="c1" 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">@@ -720,7 +742,9 @@ arityType :: ArityEnv -> CoreExpr -> ArityType</td>
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<pre style="margin: 0;"> <span id="LC742" class="line" lang="haskell"><span class="n" style="color: #333;">arityType</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Cast</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">co</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC743" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">arityType</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC744" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ATop</span> <span class="n" style="color: #333;">os</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ATop</span> <span class="p">(</span><span class="n" style="color: #333;">take</span> <span class="n" style="color: #333;">co_arity</span> <span class="n" style="color: #333;">os</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC723" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ABot</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ABot</span> <span class="p">(</span><span class="n" style="color: #333;">n</span> <span class="p">`</span><span class="n" style="color: #333;">min</span><span class="p">`</span> <span class="n" style="color: #333;">co_arity</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC745" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Arity trimming]</span></span>
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<pre style="margin: 0;">+<span id="LC746" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ABot</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">co_arity</span> <span class="o" style="font-weight: 600;"><</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ATop</span> <span class="p">(</span><span class="n" style="color: #333;">replicate</span> <span class="n" style="color: #333;">co_arity</span> <span class="n" style="color: #333;">noOneShotInfo</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC747" 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="kt" style="color: #458; font-weight: 600;">ABot</span> <span class="n" style="color: #333;">n</span></span>
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<pre style="margin: 0;"> <span id="LC748" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC749" class="line" lang="haskell"> <span class="n" style="color: #333;">co_arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">length</span> <span class="p">(</span><span class="n" style="color: #333;">typeArity</span> <span class="p">(</span><span class="n" style="color: #333;">pSnd</span> <span class="p">(</span><span class="n" style="color: #333;">coercionKind</span> <span class="n" style="color: #333;">co</span><span class="p">)))</span></span>
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<pre style="margin: 0;"> <span id="LC750" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [exprArity invariant] (2); must be true of</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 FlexibleContexts #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE FlexibleInstances #-}</span></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TypeFamilies #-}</span></span>
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<pre style="margin: 0;">+<span id="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;">module</span> <span class="nn" style="color: #555;">Main</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">main</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</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;">import</span> <span class="nn" style="color: #555;">Control.Monad</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">join</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad.Reader</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ReaderT</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Concurrent.STM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">STM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">atomically</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Kind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">class</span> <span class="kt" style="color: #458; font-weight: 600;">Monad</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Transaction</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">MonadPersist</span> <span class="n" style="color: #333;">m</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">Transaction</span> <span class="n" style="color: #333;">m</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;">Type</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"> <span class="n" style="color: #333;">atomicTransaction</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Transaction</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">y</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">MonadPersist</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ReaderT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">Transaction</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ReaderT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ReaderT</span> <span class="nb" style="color: #0086b3;">()</span> <span class="kt" style="color: #458; font-weight: 600;">STM</span></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"> <span class="n" style="color: #333;">atomicTransaction</span> <span class="n" style="color: #333;">act</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ReaderT</span> <span class="p">(</span><span class="n" style="color: #333;">atomically</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">runReaderT</span> <span class="n" style="color: #333;">act</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">join</span> <span class="p">(</span><span class="n" style="color: #333;">runReaderT</span> <span class="n" style="color: #333;">doPure2</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">)</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">seq</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"><span class="n" style="color: #333;">doPure2</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MonadPersist</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">m</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="n" style="color: #333;">doPure2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">atomicTransaction</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"> <span class="nb" style="color: #0086b3;">()</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pure</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"> <span class="nb" style="color: #0086b3;">()</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pure</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"> <span class="n" style="color: #333;">error</span> <span class="s" style="color: #d14;">"exit never happens"</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/commit/bb929009523a20271e1af34990e5c85d440de0d7#8e53179ec293cbdc2499fe687c21b51d5ad83aa8"><strong>testsuite/tests/simplCore/should_run/T16066.stderr</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext">T16066: exit never happens</span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">CallStack (from HasCallStack):</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext"> error, called at T16066.hs:31:3 in main:Main</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/commit/bb929009523a20271e1af34990e5c85d440de0d7#03e40b9006a3cfc01e112fe32513b15c8634f9bc"><strong>testsuite/tests/simplCore/should_run/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">@@ -90,3 +90,4 @@ test('T15114', only_ways('optasm'), compile_and_run, [''])</td>
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<pre style="margin: 0;"> <span id="LC90" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T15436'</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 class="s" style="color: #d14;">''</span><span class="p">])</span></span>
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<pre style="margin: 0;"> <span id="LC91" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T15840'</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 class="s" style="color: #d14;">''</span><span class="p">])</span></span>
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<pre style="margin: 0;"> <span id="LC92" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T15840a'</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 class="s" style="color: #d14;">''</span><span class="p">])</span></span>
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<pre style="margin: 0;">+<span id="LC93" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">(</span><span class="s" style="color: #d14;">'T16066'</span><span class="p">,</span> <span class="nv" style="color: #008080;">exit_code</span><span class="p">(</span><span class="mi" style="color: #099;">1</span><span class="p">),</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[</span><span class="s" style="color: #d14;">'-O1'</span><span class="p">])</span></span></pre>
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