April 2015 - ghc-tickets

[GHC] #9855: Harbormaster uses the wrong code sometimes
by GHC 17 Sep '15

17 Sep '15

#9855: Harbormaster uses the wrong code sometimes -------------------------------------+------------------------------------- Reporter: goldfire | Owner: hvr Type: bug | Status: new Priority: normal | Milestone: Component: Trac & Git | Version: Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Harbormaster sometimes uses an inconsistent codebase for building, and then reports spurious build errors. A specific example is [https://phabricator.haskell.org/harbormaster/build/2444/ here]. The line where the error is reported is correct in the Differential view, but somehow Harbormaster is confused. Even stranger, this particular error could result only if ''part'' of a file were out-of-date. Something somewhere is trying to be awfully clever and failing. I know that sometimes I have deviated from any recommended Phab workflow. I attest that, to the best of my knowledge, I have not done so with this patch. It is based off my `origin/master`, and I have done no rebasing since posting on Phab. I have not pushed to the central GHC repo, but that doesn't appear to be necessary. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9855> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9710: Clean up Trac versions
by GHC 16 Sep '15

16 Sep '15

#9710: Clean up Trac versions -------------------------------------+------------------------------------- Reporter: goldfire | Owner: Type: task | Status: new Priority: normal | Milestone: Component: Build System | Version: 7.8.3 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- The "Version" pull-down menu in Trac has no apparent ordering principle. This should be fixed. Even better, scrap many of the very old versions, as they're unsupported, anyway. Thanks! -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9710> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #10305: Windows validate failures
by GHC 16 Sep '15

16 Sep '15

#10305: Windows validate failures -------------------------------------+------------------------------------- Reporter: simonpj | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Blocked By: Test Case: | Related Tickets: Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Running `sh validate --fast` on Windows gives the error log below. There seem to be at least three problems * Some unexpected failures. Let's ignore those for now, since they are probably all different * Some Python traceback stuff; this must be a bug. * Tons of warnings about `haddock-interfaces` Could someone help with these. Yes, I can just ignore all this output, but it seems wrong. Thanks Simon {{{ OVERALL SUMMARY for test run started at 04/14/15 22:37:45 GMT Daylight Time 0:53:23 spent to go through 4437 total tests, which gave rise to 13186 test cases, of which 9122 were skipped 53 had missing libraries 3915 expected passes 79 expected failures 4 caused framework failures 2 unexpected passes 7 unexpected failures 5 unexpected stat failures Unexpected passes: rts T5250 (normal) rts linker_unload (normal) Unexpected failures: ../../libraries/base/tests/System Timeout001 [bad exit code] (normal) codeGen/should_compile debug [bad exit code] (normal) ghc-e/should_fail T9930fail [bad exit code] (normal) ghci/linking T1407 [bad stderr] (ghci) ghci/scripts T5975a [bad stderr] (ghci) ghci/scripts T9878b [bad exit code] (ghci) stranal/should_run T10148 [bad stderr] (optasm) Unexpected stat failures: perf/compiler T5030 [stat too good] (normal) perf/compiler T5837 [stat too good] (normal) perf/compiler T783 [stat not good enough] (normal) perf/compiler T9872d [stat not good enough] (normal) perf/should_run T9203 [stat not good enough] (normal) Traceback (most recent call last): File "C:\code\HEAD\testsuite\driver\testlib.py", line 806, in do_test result = func(*[name,way] + args) File "C:\code\HEAD\testsuite\driver\testlib.py", line 1121, in stats return checkStats(name, way, stats_file, opts.stats_range_fields) File "C:\code\HEAD\testsuite\driver\testlib.py", line 1131, in checkStats f = open(in_testdir(stats_file)) IOError: [Errno 2] No such file or directory: './perf/haddock/../../../../libraries/base/dist- install/doc/html/base/base.haddock.t' Traceback (most recent call last): File "C:\code\HEAD\testsuite\driver\testlib.py", line 806, in do_test result = func(*[name,way] + args) File "C:\code\HEAD\testsuite\driver\testlib.py", line 1121, in stats return checkStats(name, way, stats_file, opts.stats_range_fields) File "C:\code\HEAD\testsuite\driver\testlib.py", line 1131, in checkStats f = open(in_testdir(stats_file)) IOError: [Errno 2] No such file or directory: './perf/haddock/../../../../libraries/Cabal/Cabal/dist- install/doc/html/Cabal/Cabal.haddock.t' Traceback (most recent call last): File "C:\code\HEAD\testsuite\driver\testlib.py", line 806, in do_test result = func(*[name,way] + args) File "C:\code\HEAD\testsuite\driver\testlib.py", line 1121, in stats return checkStats(name, way, stats_file, opts.stats_range_fields) File "C:\code\HEAD\testsuite\driver\testlib.py", line 1131, in checkStats f = open(in_testdir(stats_file)) IOError: [Errno 2] No such file or directory: './perf/haddock/../../../../compiler/stage2/doc/html/ghc/ghc.haddock.t' make[2]: Leaving directory '/cygdrive/c/code/HEAD/testsuite/tests' make[1]: Leaving directory '/cygdrive/c/code/HEAD/testsuite/tests' == Start post-testsuite package check Timestamp 2015-04-07 22:25:31 UTC for C:\Users\simonpj\AppData\Roaming\ghc\i386-mingw32-7.11.20150407\package.conf.d\package.cache Timestamp 2015-04-07 22:25:31 UTC for C:\Users\simonpj\AppData\Roaming\ghc\i386-mingw32-7.11.20150407\package.conf.d (same as cache) using cache: C:\Users\simonpj\AppData\Roaming\ghc\i386-mingw32-7.11.20150407\package.conf.d\package.cache Timestamp 2015-04-14 21:31:48 UTC for C:/code/HEAD/inplace\lib\package.conf.d\package.cache Timestamp 2015-04-14 21:31:48 UTC for C:/code/HEAD/inplace\lib\package.conf.d (same as cache) using cache: C:/code/HEAD/inplace\lib\package.conf.d\package.cache db stack: ["C:\\Users\\simonpj\\AppData\\Roaming\\ghc\\i386-mingw32-7.11.20150407\\package.conf.d","C:/code/HEAD/inplace\\lib\\package.conf.d"] modifying: Nothing flag db stack: ["C:\\Users\\simonpj\\AppData\\Roaming\\ghc\\i386-mingw32-7.11.20150407\\package.conf.d","C:/code/HEAD/inplace\\lib\\package.conf.d"] Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\linear-1.18.0.1\html\linear.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\linear-1.18.0.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\lens-4.9\html\lens.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\lens-4.9\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows-ghc-7.11.20150407 \kan-extensions-4.2.1\html\kan-extensions.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\kan-extensions-4.2.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\adjunctions-4.2\html\adjunctions.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\adjunctions-4.2\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\free-4.11\html\free.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\free-4.11\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\profunctors-4.4.1\html\profunctors.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\profunctors-4.4.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\bifunctors-4.2.1\html\bifunctors.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\bifunctors-4.2.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\semigroupoids-4.3\html\semigroupoids.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\semigroupoids-4.3\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\comonad-4.2.5\html\comonad.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\comonad-4.2.5\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\contravariant-1.3.1\html\contravariant.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\contravariant-1.3.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\bytes-0.15\html\bytes.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\bytes-0.15\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\void-0.7\html\void.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\void-0.7\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\semigroups-0.16.2.2\html\semigroups.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\semigroups-0.16.2.2\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows-ghc-7.11.20150407 \unordered-containers-0.2.5.1\html\unordered-containers.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\unordered-containers-0.2.5.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\exceptions-0.8.0.2\html\exceptions.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\exceptions-0.8.0.2\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\distributive-0.4.4\html\distributive.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\distributive-0.4.4\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\hashable-1.2.3.2\html\hashable.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\hashable-1.2.3.2\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\vector-0.10.12.3\html\vector.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\vector-0.10.12.3\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows-ghc-7.11.20150407 \transformers-compat-0.4.0.4\html\transformers-compat.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\transformers-compat-0.4.0.4\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\text-1.2.0.4\html\text.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\text-1.2.0.4\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\tagged-0.8.0.1\html\tagged.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\tagged-0.8.0.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\reflection-1.5.1.2\html\reflection.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\reflection-1.5.1.2\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\primitive-0.6\html\primitive.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\primitive-0.6\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows-ghc-7.11.20150407 \prelude-extras-0.4\html\prelude-extras.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\prelude-extras-0.4\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\nats-1\html\nats.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\nats-1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\mtl-2.2.1\html\mtl.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\mtl-2.2.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\cereal-0.4.1.1\html\cereal.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\cereal-0.4.1.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386-windows- ghc-7.11.20150407\StateVar-1.1.0.0\html\StateVar.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\simonpj\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.11.20150407\StateVar-1.1.0.0\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\code\HEAD\libraries\stm\dist- install\doc\html\stm\stm.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\parallel\dist- install\doc\html\parallel\parallel.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\compiler\stage2\doc\html\ghc\ghc.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\haskeline\dist- install\doc\html\haskeline\haskeline.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\transformers\dist- install\doc\html\transformers\transformers.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\hoopl\dist- install\doc\html\hoopl\hoopl.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\bin-package-db\dist- install\doc\html\bin-package-db\bin-package-db.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\Cabal\Cabal\dist- install\doc\html\Cabal\Cabal.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\binary\dist- install\doc\html\binary\binary.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\template-haskell\dist- install\doc\html\template-haskell\template-haskell.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\pretty\dist- install\doc\html\pretty\pretty.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\hpc\dist- install\doc\html\hpc\hpc.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\process\dist- install\doc\html\process\process.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\directory\dist- install\doc\html\directory\directory.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\time\dist- install\doc\html\time\time.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\Win32\dist- install\doc\html\Win32\Win32.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\containers\dist- install\doc\html\containers\containers.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\bytestring\dist- install\doc\html\bytestring\bytestring.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\deepseq\dist- install\doc\html\deepseq\deepseq.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\array\dist- install\doc\html\array\array.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\filepath\dist- install\doc\html\filepath\filepath.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\base\dist- install\doc\html\base\base.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\integer-gmp\dist- install\doc\html\integer-gmp\integer-gmp.haddock doesn't exist or isn't a file Warning: haddock-interfaces: C:\code\HEAD\libraries\ghc-prim\dist- install\doc\html\ghc-prim\ghc-prim.haddock doesn't exist or isn't a file == End post-testsuite package check ------------------------------------------------------------------- Oops! Looks like you have some unexpected test results or framework failures. Please fix them before pushing/sending patches. ------------------------------------------------------------------- HEAD $ }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10305> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #10044: Wrong line number reported with CPP and line beginning with #
by GHC 16 Sep '15

16 Sep '15

#10044: Wrong line number reported with CPP and line beginning with # -------------------------------------+------------------------------------- Reporter: goldfire | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 7.10.1-rc2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Blocked By: Test Case: | Related Tickets: Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- If I compile {{{ {-# LANGUAGE CPP #-} module Bug where {- # hi there! -} * }}} I'm told of a parse error for the `*` on line 10. But that `*` is line 9! The problem is that, with `CPP` on, the line number counter gets confused if a line begins with a #, perhaps after whitespace. I actually hit this and was confused in real code. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10044> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9235: Simplifier ticks exhausted on recursive class method
by GHC 16 Sep '15

16 Sep '15

#9235: Simplifier ticks exhausted on recursive class method -----------------------------------+--------------------------------------- Reporter: klao | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Compile-time crash Unknown/Multiple | Test Case: Difficulty: Unknown | Blocking: Blocked By: | Related Tickets: | -----------------------------------+--------------------------------------- GHC 7.8 and HEAD panic on the following code: {{{#!haskell module C where class C a where c :: C a => a -> Int c a = c a {-# INLINE c #-} instance C () x :: Int x = c () }}} Note that it's the coincidence of the 3 conditions that triggers this bug: 1. the `c` method has to be inlined (explicity or implicitly) 2. it has to be recursive (but, it doesn't have to be as dumbly recursive as in the example) 3. it has to have this weird, slightly mistaken type signature: `C a => a -> Int` instead of simply `a -> Int`. But, when this incidentally happens (in my case, both 2. ''and'' 3. were unintentional), the user gets a very hard to debug issue. They don't even get an indication which module is responsible if `c` is used from a different module than the one with the class definition. Also note that this happens even with a non-optimized build. And in this example `c` has to be explicitly marked NOINLINE to prevent it. (In the instance that I caught in the wild simply removing the INLINE annotation was enough.) Finally, on a side note: shouldn't 3. by itself be an error? Or a warning at least? -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9235> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9925: ghc internal error while installing hakyll
by GHC 16 Sep '15

16 Sep '15

#9925: ghc internal error while installing hakyll ----------------------------------+---------------------------------------- Reporter: fvictorio | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: Linux Architecture: x86_64 (amd64) | Type of failure: Runtime crash Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: ----------------------------------+---------------------------------------- Tried to install hakyll on Ubuntu 14.04 {{{ cabal update cabal install hakyll }}} Error during installation: {{{ [55 of 69] Compiling Text.Pandoc.Writers.OpenDocument ( src/Text/Pandoc/Writers/OpenDocument.hs, dist/build/Text/Pandoc/Writers/OpenDocument.o ) ghc: internal error: evacuate: strange closure type 15574408 (GHC version 7.6.3 for x86_64_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9925> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8168: ghc "Simplifier ticks exhausted" "When trying UnfoldingDone"
by GHC 16 Sep '15

16 Sep '15

#8168: ghc "Simplifier ticks exhausted" "When trying UnfoldingDone" -------------------------------------+------------------------------------- Reporter: sp55aa | Owner: Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 7.6.3 Keywords: Simplifier, | Operating System: Windows UnfoldingDone, simpl-tick-factor | Type of failure: GHC rejects Architecture: x86 | valid program Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | -------------------------------------+------------------------------------- ghc fail to compile this file: ---- begin Y.hs ---- newtype Rec a = Rec { unRec :: Rec a -> a } y :: (a -> a) -> a y = \f -> (\x -> f (unRec x x)) (Rec (\x -> f (unRec x x))) foo :: (a -> a) -> a -> a foo f n = f n main = print $ y foo 4 ---- end Y.hs ---- C:\Users\user\Desktop>ghc Y.lhs [1 of 1] Compiling Main ( Y.lhs, Y.o ) ghc: panic! (the 'impossible' happened) (GHC version 7.6.3 for i386-unknown-mingw32): Simplifier ticks exhausted When trying UnfoldingDone a_sqe{v} [lid] To increase the limit, use -fsimpl-tick-factor=N (default 100) If you need to do this, let GHC HQ know, and what factor you needed To see detailed counts use -ddump-simpl-stats Total ticks: 5601 Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8168> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #10105: ghc panic Simplifier ticks exhausted when trying UnfoldingDone x_alB
by GHC 16 Sep '15

16 Sep '15

#10105: ghc panic Simplifier ticks exhausted when trying UnfoldingDone x_alB -------------------------------------+------------------------------------- Reporter: | Owner: dramforever | Status: new Type: bug | Milestone: Priority: normal | Version: 7.10.1-rc2 Component: Compiler | Operating System: Unknown/Multiple Keywords: | Type of failure: None/Unknown Architecture: | Blocked By: Unknown/Multiple | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- The following code causes a panic. It's the Y combinator. {{{#!hs module Y where newtype F a = F { unF :: F a -> a } y :: (a -> a) -> a y = \f -> (\x -> x (F x)) (\x -> f (unF x x)) }}} {{{ bash$ ~/src/ghc-7.10.0.20150123/installed/bin/ghc -c Y.hs ghc: panic! (the 'impossible' happened) (GHC version 7.10.0.20150123 for x86_64-unknown-linux): Simplifier ticks exhausted When trying UnfoldingDone x_alB To increase the limit, use -fsimpl-tick-factor=N (default 100) If you need to do this, let GHC HQ know, and what factor you needed To see detailed counts use -ddump-simpl-stats Total ticks: 4722 Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} However it works fine in GHCi {{{ bash$ ~/src/ghc-7.10.0.20150123/installed/bin/ghci Y.hs GHCi, version 7.10.0.20150123: http://www.haskell.org/ghc/ :? for help [1 of 1] Compiling Y ( Y.hs, interpreted ) Ok, modules loaded: Y. *Y> take 10 (y (1:)) [1,1,1,1,1,1,1,1,1,1] }}} I have tried this code with 7.6.3, 7.8.3 and 7.10.1-rc2. Same result. At least in 7.10.1-rc2 it doesn't work even with -fsimpl-tick- factor=100000 (that's 10^5^) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10105> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8689: confusing comment in compiler/main/SysTools.lhs
by GHC 16 Sep '15

16 Sep '15

#8689: confusing comment in compiler/main/SysTools.lhs ------------------------------------+------------------------------------- Reporter: carter | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.7 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- on line 341 {{{ -- Hans: this isn't right in general, but you can -- elaborate it in the same way as the others }}} I have NO idea what that comment is referring to -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8689> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9636: Function with type error accepted
by GHC 15 Sep '15

15 Sep '15

#9636: Function with type error accepted -------------------------------------+------------------------------------- Reporter: augustss | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- The following program is accepted by ghc even though it is clearly wrong. The type family T is closed so T Bool cannot ever be reduced, so it must be a type error. {{{#!hs {-# LANGUAGE TypeFamilies #-} module Err62 where type family T a where T Int = () x :: T Bool x = undefined f :: T Bool -> Bool f _ = True y :: Bool y = f x }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9636> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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