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Marge Bot pushed to branch master
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/235e410f63a4725bbc4466dbdef7d5f661793e84">235e410f</a></strong>
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<span>by Richard Eisenberg</span>
<i>at 2020-09-30T02:51:29-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Regression test for #10709.
Close #10709
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<h4>5 changed files:</h4>
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testsuite/tests/typecheck/should_fail/T10709.hs
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testsuite/tests/typecheck/should_fail/T10709.stderr
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testsuite/tests/typecheck/should_fail/T10709b.hs
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testsuite/tests/typecheck/should_fail/T10709b.stderr
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testsuite/tests/typecheck/should_fail/all.T
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<h4>Changes:</h4>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/235e410f63a4725bbc4466dbdef7d5f661793e84#5e1fa88d87f580d246ed5f6615fa56e39289e8df"><strong>testsuite/tests/typecheck/should_fail/T10709.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T10709</span> <span class="kr" style="font-weight: 600;">where</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;">import</span> <span class="nn" style="color: #555;">GHC.IO</span></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;">Control.Monad</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;">x1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">replicateM</span> <span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">mask</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="n" style="color: #333;">x2</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">replicateM</span> <span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">mask</span><span class="p">)</span> <span class="n" style="color: #333;">undefined</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="n" style="color: #333;">x3</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">replicateM</span> <span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">mask</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">undefined</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/235e410f63a4725bbc4466dbdef7d5f661793e84#693cb49ef9e7aa9ea6f2fcf10673accf2146c12b"><strong>testsuite/tests/typecheck/should_fail/T10709.stderr</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T10709.hs:6:21: error:</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext"> • Couldn't match type ‘a4’ with ‘(forall a. IO a -> IO a) -> IO a5’</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext"> Expected: a4 -> IO a5</span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext"> Actual: ((forall a. IO a -> IO a) -> IO a5) -> IO a5</span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext"> Cannot instantiate unification variable ‘a4’</span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext"> with a type involving polytypes: (forall a. IO a -> IO a) -> IO a5</span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="plaintext"> • In the second argument of ‘(.)’, namely ‘mask’</span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="plaintext"> In the expression: replicateM 2 . mask</span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="plaintext"> In an equation for ‘x1’: x1 = replicateM 2 . mask</span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext"> • Relevant bindings include</span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="plaintext"> x1 :: a4 -> IO [a5] (bound at T10709.hs:6:1)</span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="plaintext">T10709.hs:7:22: error:</span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="plaintext"> • Couldn't match type ‘a2’ with ‘(forall a. IO a -> IO a) -> IO a3’</span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="plaintext"> Expected: a2 -> IO a3</span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext"> Actual: ((forall a. IO a -> IO a) -> IO a3) -> IO a3</span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="plaintext"> Cannot instantiate unification variable ‘a2’</span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="plaintext"> with a type involving polytypes: (forall a. IO a -> IO a) -> IO a3</span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="plaintext"> • In the second argument of ‘(.)’, namely ‘mask’</span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="plaintext"> In the expression: (replicateM 2 . mask) undefined</span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="plaintext"> In an equation for ‘x2’: x2 = (replicateM 2 . mask) undefined</span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="plaintext"> • Relevant bindings include x2 :: IO [a3] (bound at T10709.hs:7:1)</span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="plaintext">T10709.hs:8:22: error:</span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="plaintext"> • Couldn't match type ‘a0’ with ‘(forall a. IO a -> IO a) -> IO a1’</span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="plaintext"> Expected: a0 -> IO a1</span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="plaintext"> Actual: ((forall a. IO a -> IO a) -> IO a1) -> IO a1</span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="plaintext"> Cannot instantiate unification variable ‘a0’</span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="plaintext"> with a type involving polytypes: (forall a. IO a -> IO a) -> IO a1</span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="plaintext"> • In the second argument of ‘(.)’, namely ‘mask’</span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="plaintext"> In the first argument of ‘($)’, namely ‘(replicateM 2 . mask)’</span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="plaintext"> In the expression: (replicateM 2 . mask) $ undefined</span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="plaintext"> • Relevant bindings include x3 :: IO [a1] (bound at T10709.hs:8:1)</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/235e410f63a4725bbc4466dbdef7d5f661793e84#f19f12814d186ddd89596879873c2cee655e3848"><strong>testsuite/tests/typecheck/should_fail/T10709b.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T10709b</span> <span class="kr" style="font-weight: 600;">where</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;">import</span> <span class="nn" style="color: #555;">GHC.IO</span></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;">Control.Monad</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;">x4</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">replicateM</span> <span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">mask</span><span class="p">)</span> <span class="p">(</span><span class="nf" style="color: #900; 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;">return</span> <span class="nb" style="color: #0086b3;">()</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;">x5</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">replicateM</span> <span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">mask</span><span class="p">)</span> <span class="p">(</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;">undefined</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="n" style="color: #333;">x6</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">replicateM</span> <span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">mask</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">id</span> <span class="p">(</span><span class="nf" style="color: #900; 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;">undefined</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="n" style="color: #333;">x7</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">replicateM</span> <span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">mask</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="n" style="color: #333;">undefined</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="n" style="color: #333;">x8</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">replicateM</span> <span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">mask</span><span class="p">)</span> <span class="p">((</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;">undefined</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="o" style="font-weight: 600;">::</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></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/235e410f63a4725bbc4466dbdef7d5f661793e84#45bd935a81a5dbfb229f89f8e31a5d1a00e2fa25"><strong>testsuite/tests/typecheck/should_fail/T10709b.stderr</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T10709b.hs:6:22: error:</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext"> • Couldn't match type ‘p1’ with ‘forall a. IO a -> IO a’</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext"> Expected: (p1 -> IO ()) -> IO ()</span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext"> Actual: ((forall a. IO a -> IO a) -> IO ()) -> IO ()</span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext"> Cannot instantiate unification variable ‘p1’</span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext"> with a type involving polytypes: forall a. IO a -> IO a</span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="plaintext"> • In the second argument of ‘(.)’, namely ‘mask’</span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="plaintext"> In the expression: (replicateM 2 . mask) (\ _ -> return ())</span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="plaintext"> In an equation for ‘x4’:</span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext"> x4 = (replicateM 2 . mask) (\ _ -> return ())</span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="plaintext">T10709b.hs:7:22: error:</span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="plaintext"> • Couldn't match type ‘t0’ with ‘forall a. IO a -> IO a’</span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="plaintext"> Expected: (t0 -> IO a) -> IO a</span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="plaintext"> Actual: ((forall a1. IO a1 -> IO a1) -> IO a) -> IO a</span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext"> Cannot instantiate unification variable ‘t0’</span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="plaintext"> with a type involving polytypes: forall a. IO a -> IO a</span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="plaintext"> • In the second argument of ‘(.)’, namely ‘mask’</span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="plaintext"> In the expression: (replicateM 2 . mask) (\ x -> undefined x)</span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="plaintext"> In an equation for ‘x5’:</span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="plaintext"> x5 = (replicateM 2 . mask) (\ x -> undefined x)</span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="plaintext">T10709b.hs:8:22: error:</span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="plaintext"> • Couldn't match type ‘p0’ with ‘forall a. IO a -> IO a’</span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="plaintext"> Expected: (p0 -> IO a) -> IO a</span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="plaintext"> Actual: ((forall a1. IO a1 -> IO a1) -> IO a) -> IO a</span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="plaintext"> Cannot instantiate unification variable ‘p0’</span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="plaintext"> with a type involving polytypes: forall a. IO a -> IO a</span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="plaintext"> • In the second argument of ‘(.)’, namely ‘mask’</span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="plaintext"> In the expression: (replicateM 2 . mask) (id (\ _ -> undefined))</span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="plaintext"> In an equation for ‘x6’:</span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="plaintext"> x6 = (replicateM 2 . mask) (id (\ _ -> undefined))</span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="plaintext">T10709b.hs:9:22: error:</span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="plaintext"> • Couldn't match type ‘b0’ with ‘forall a. IO a -> IO a’</span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="plaintext"> Expected: (b0 -> IO a) -> IO a</span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="plaintext"> Actual: ((forall a1. IO a1 -> IO a1) -> IO a) -> IO a</span>
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="plaintext"> Cannot instantiate unification variable ‘b0’</span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="plaintext"> with a type involving polytypes: forall a. IO a -> IO a</span>
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<pre style="margin: 0;">+<span id="LC41" class="line" lang="plaintext"> • In the second argument of ‘(.)’, namely ‘mask’</span>
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<pre style="margin: 0;">+<span id="LC42" class="line" lang="plaintext"> In the expression: (replicateM 2 . mask) (const undefined)</span>
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<pre style="margin: 0;">+<span id="LC43" class="line" lang="plaintext"> In an equation for ‘x7’:</span>
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<pre style="margin: 0;">+<span id="LC44" class="line" lang="plaintext"> x7 = (replicateM 2 . mask) (const undefined)</span>
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<pre style="margin: 0;">+<span id="LC45" class="line" lang="plaintext"></span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="plaintext">T10709b.hs:10:22: error:</span>
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<pre style="margin: 0;">+<span id="LC47" class="line" lang="plaintext"> • Couldn't match type ‘a0’ with ‘forall a. IO a -> IO a’</span>
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<pre style="margin: 0;">+<span id="LC48" class="line" lang="plaintext"> Expected: (a0 -> IO a) -> IO a</span>
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<pre style="margin: 0;">+<span id="LC49" class="line" lang="plaintext"> Actual: ((forall a1. IO a1 -> IO a1) -> IO a) -> IO a</span>
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<pre style="margin: 0;">+<span id="LC50" class="line" lang="plaintext"> Cannot instantiate unification variable ‘a0’</span>
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<pre style="margin: 0;">+<span id="LC51" class="line" lang="plaintext"> with a type involving polytypes: forall a. IO a -> IO a</span>
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<pre style="margin: 0;">+<span id="LC52" class="line" lang="plaintext"> • In the second argument of ‘(.)’, namely ‘mask’</span>
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<pre style="margin: 0;">+<span id="LC53" class="line" lang="plaintext"> In the expression:</span>
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<pre style="margin: 0;">+<span id="LC54" class="line" lang="plaintext"> (replicateM 2 . mask) ((\ x -> undefined x) :: a -> b)</span>
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<pre style="margin: 0;">+<span id="LC55" class="line" lang="plaintext"> In an equation for ‘x8’:</span>
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<pre style="margin: 0;">+<span id="LC56" class="line" lang="plaintext"> x8 = (replicateM 2 . mask) ((\ x -> undefined x) :: a -> b)</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/235e410f63a4725bbc4466dbdef7d5f661793e84#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">@@ -584,3 +584,5 @@ test('too-many', normal, compile_fail, [''])</td>
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<pre style="margin: 0;"> <span id="LC584" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18640a</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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585
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585
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<pre style="margin: 0;"> <span id="LC585" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18640b</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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586
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586
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<pre style="margin: 0;"> <span id="LC586" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18640c</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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587
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<pre style="margin: 0;">+<span id="LC587" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T10709</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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588
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<pre style="margin: 0;">+<span id="LC588" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T10709b</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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