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[GHC] #11974: `default` declaration doesn't allow higher-kinded types
by GHC 01 Dec '16

01 Dec '16

#11974: `default` declaration doesn't allow higher-kinded types -------------------------------------+------------------------------------- Reporter: goldfire | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Since we now have #10971, I would expect the following to work: {{{ {-# LANGUAGE ExtendedDefaultRules #-} module Bug where default (Maybe, []) }}} But it doesn't. Sadly, the default default list contains `[]`, but the user can never set this. Fix on the way. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11974> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #12792: Wrong error message when using a data type as a class instance head
by GHC 01 Dec '16

01 Dec '16

#12792: Wrong error message when using a data type as a class instance head -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Keywords: newcomer | Operating System: Unknown/Multiple Architecture: | Type of failure: Incorrect Unknown/Multiple | error/warning at compile-time Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- {{{ Prelude> data List a = Nil | Cons a (List a) Prelude> instance List a <interactive>:3:10: error: • Expected a constraint, but ‘List a’ has kind ‘*’ • In the instance declaration for ‘List a’ Prelude> instance List a where foo = foo <interactive>:2:23: error: ‘foo’ is not a (visible) method of class ‘List’ }}} Clearly, the constraint check should happen before we look at the method names. Happens with 7.10 and 8.0.1 and HEAD. Shouldn’t be hard, marking at newcomer. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12792> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #12904: GHC 7.10.3 Binary distribution is broken.
by GHC 01 Dec '16

01 Dec '16

#12904: GHC 7.10.3 Binary distribution is broken. --------------------------------+------------------------------------------ Reporter: Phyx- | Owner: bgamari Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 7.10.3 Keywords: | Operating System: Unknown/Multiple Architecture: x86 | Type of failure: Installing GHC failed Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: --------------------------------+------------------------------------------ The GHC i386 binary for Windows hosted on https://downloads.haskell.org/~ghc/7.10.3/ghc-7.10.3-i386-unknown- mingw32.tar.xz is broken. {{{ Tamar@Rage MINGW64 ~/Temp $ wget https://downloads.haskell.org/~ghc/7.10.3/ghc-7.10.3-i386-unknown- mingw32.tar.xz --2016-11-30 19:32:15-- https://downloads.haskell.org/~ghc/7.10.3/ghc-7.10.3-i386-unknown- mingw32.tar.xz Resolving downloads.haskell.org (downloads.haskell.org) 151.101.16.68 Connecting to downloads.haskell.org (downloads.haskell.org)|151.101.16.68|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 131297148 (125M) [application/octet-stream] Saving to: ‘ghc-7.10.3-i386-unknown-mingw32.tar.xz’ ghc-7.10.3-i386-unknown-mingw32.tar.xz 100%[==========================================================================================================================================>] 125.21M 3.11MB/s in 42s 2016-11-30 19:32:58 (2.98 MB/s) - ‘ghc-7.10.3-i386-unknown-mingw32.tar.xz’ saved [131297148/131297148] Tamar@Rage MINGW64 ~/Temp $ xz -d ghc-7.10.3-i386-unknown-mingw32.tar.xz Tamar@Rage MINGW64 ~/Temp $ tar xf ghc-7.10.3-i386-unknown-mingw32.tar ghc-7.10.3/ Tamar@Rage MINGW64 ~/Temp $ ghc-7.10.3/bin/ghc-pkg.exe check Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\mtl-2.2.1\html\mtl.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\mtl-2.2.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\QuickCheck-2.9.2\html\QuickCheck.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\QuickCheck-2.9.2\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\tf-random-0.5\html\tf-random.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\tf-random-0.5\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\primitive-0.6.2.0\html\primitive.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\primitive-0.6.2.0\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\random-1.1\html\random.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\random-1.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\semigroups-0.18.2\html\semigroups.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\semigroups-0.18.2\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\unordered-containers-0.2.7.1\html\unordered- containers.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\unordered-containers-0.2.7.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\tagged-0.8.5\html\tagged.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\tagged-0.8.5\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\hashable-1.2.4.0\html\hashable.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\hashable-1.2.4.0\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\transformers-compat-0.5.1.4\html\transformers- compat.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\transformers-compat-0.5.1.4\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\text-1.2.2.1\html\text.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\text-1.2.2.1\html doesn't exist or isn't a directory Warning: haddock-interfaces: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\Cabal-1.24.1.0\html\Cabal.haddock doesn't exist or isn't a file Warning: haddock-html: C:\Users\Tamar\AppData\Roaming\cabal\doc\i386 -windows-ghc-7.10.3\Cabal-1.24.1.0\html doesn't exist or isn't a directory There are problems in package QuickCheck-2.8.2: Warning: library-dirs: C:/ProgramData/chocolatey/lib/ghc- devel-x86/msys32/usr/local\i386-windows- ghc-7.10.3\QuickCheck-2.8.2-FVXBHVG9RbOFIRbzutBVgm doesn't exist or isn't a directory Warning: haddock-interfaces: C:/ProgramData/chocolatey/lib/ghc- devel-x86/msys32/usr/local\doc\i386-windows- ghc-7.10.3\QuickCheck-2.8.2\html\QuickCheck.haddock doesn't exist or isn't a file Warning: haddock-html: C:/ProgramData/chocolatey/lib/ghc- devel-x86/msys32/usr/local\doc\i386-windows- ghc-7.10.3\QuickCheck-2.8.2\html doesn't exist or isn't a directory dependency "random-1.1-7QYmtoQynVDOpQqT5qt8s" doesn't exist dependency "tf-random-0.5-2tObRpM5RdhFns5AGGuShR" doesn't exist import-dirs: C:/ProgramData/chocolatey/lib/ghc- devel-x86/msys32/usr/local\i386-windows- ghc-7.10.3\QuickCheck-2.8.2-FVXBHVG9RbOFIRbzutBVgm doesn't exist or isn't a directory cannot find any of ["Test\\QuickCheck.hi","Test\\QuickCheck.p_hi","Test\\QuickCheck.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Arbitrary.hi","Test\\QuickCheck\\Arbitrary.p_hi","Test\\QuickCheck\\Arbitrary.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Gen.hi","Test\\QuickCheck\\Gen.p_hi","Test\\QuickCheck\\Gen.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Gen\\Unsafe.hi","Test\\QuickCheck\\Gen\\Unsafe.p_hi","Test\\QuickCheck\\Gen\\Unsafe.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Monadic.hi","Test\\QuickCheck\\Monadic.p_hi","Test\\QuickCheck\\Monadic.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Modifiers.hi","Test\\QuickCheck\\Modifiers.p_hi","Test\\QuickCheck\\Modifiers.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Property.hi","Test\\QuickCheck\\Property.p_hi","Test\\QuickCheck\\Property.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Test.hi","Test\\QuickCheck\\Test.p_hi","Test\\QuickCheck\\Test.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Text.hi","Test\\QuickCheck\\Text.p_hi","Test\\QuickCheck\\Text.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Poly.hi","Test\\QuickCheck\\Poly.p_hi","Test\\QuickCheck\\Poly.dyn_hi"] cannot find any of ["Test\\QuickCheck\\State.hi","Test\\QuickCheck\\State.p_hi","Test\\QuickCheck\\State.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Random.hi","Test\\QuickCheck\\Random.p_hi","Test\\QuickCheck\\Random.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Exception.hi","Test\\QuickCheck\\Exception.p_hi","Test\\QuickCheck\\Exception.dyn_hi"] cannot find any of ["Test\\QuickCheck\\Function.hi","Test\\QuickCheck\\Function.p_hi","Test\\QuickCheck\\Function.dyn_hi"] cannot find any of ["Test\\QuickCheck\\All.hi","Test\\QuickCheck\\All.p_hi","Test\\QuickCheck\\All.dyn_hi"] cannot find any of ["libHSQuickCheck-2.8.2-FVXBHVG9RbOFIRbzutBVgm.a","libHSQuickCheck-2.8.2-FVXBHVG9RbOFIRbzutBVgm.p_a","libHSQuickCheck-2.8.2 -FVXBHVG9RbOFIRbzutBVgm-ghc7.10.3.so","libHSQuickCheck-2.8.2 -FVXBHVG9RbOFIRbzutBVgm-ghc7.10.3.dylib","HSQuickCheck-2.8.2 -FVXBHVG9RbOFIRbzutBVgm-ghc7.10.3.dll"] on library path There are problems in package primitive-0.6.1.0: Warning: library-dirs: C:/ProgramData/chocolatey/lib/ghc- devel-x86/msys32/usr/local\i386-windows- ghc-7.10.3\primitive-0.6.1.0-DWCFovCQaj03LmIiVkz6kr doesn't exist or isn't a directory Warning: include-dirs: C:/ProgramData/chocolatey/lib/ghc- devel-x86/msys32/usr/local\i386-windows- ghc-7.10.3\primitive-0.6.1.0-DWCFovCQaj03LmIiVkz6kr\include doesn't exist or isn't a directory Warning: haddock-interfaces: C:/ProgramData/chocolatey/lib/ghc- devel-x86/msys32/usr/local\doc\i386-windows- ghc-7.10.3\primitive-0.6.1.0\html\primitive.haddock doesn't exist or isn't a file Warning: haddock-html: C:/ProgramData/chocolatey/lib/ghc- devel-x86/msys32/usr/local\doc\i386-windows- ghc-7.10.3\primitive-0.6.1.0\html doesn't exist or isn't a directory import-dirs: C:/ProgramData/chocolatey/lib/ghc- devel-x86/msys32/usr/local\i386-windows- ghc-7.10.3\primitive-0.6.1.0-DWCFovCQaj03LmIiVkz6kr doesn't exist or isn't a directory cannot find any of ["Control\\Monad\\Primitive.hi","Control\\Monad\\Primitive.p_hi","Control\\Monad\\Primitive.dyn_hi"] cannot find any of ["Data\\Primitive.hi","Data\\Primitive.p_hi","Data\\Primitive.dyn_hi"] cannot find any of ["Data\\Primitive\\MachDeps.hi","Data\\Primitive\\MachDeps.p_hi","Data\\Primitive\\MachDeps.dyn_hi"] cannot find any of ["Data\\Primitive\\Types.hi","Data\\Primitive\\Types.p_hi","Data\\Primitive\\Types.dyn_hi"] cannot find any of ["Data\\Primitive\\Array.hi","Data\\Primitive\\Array.p_hi","Data\\Primitive\\Array.dyn_hi"] cannot find any of ["Data\\Primitive\\ByteArray.hi","Data\\Primitive\\ByteArray.p_hi","Data\\Primitive\\ByteArray.dyn_hi"] cannot find any of ["Data\\Primitive\\Addr.hi","Data\\Primitive\\Addr.p_hi","Data\\Primitive\\Addr.dyn_hi"] cannot find any of ["Data\\Primitive\\MutVar.hi","Data\\Primitive\\MutVar.p_hi","Data\\Primitive\\MutVar.dyn_hi"] cannot find any of ["Data\\Primitive\\Internal\\Compat.hi","Data\\Primitive\\Internal\\Compat.p_hi","Data\\Primitive\\Internal\\Compat.dyn_hi"] cannot find any of ["Data\\Primitive\\Internal\\Operations.hi","Data\\Primitive\\Internal\\Operations.p_hi","Data\\Primitive\\Internal\\Operations.dyn_hi"] cannot find any of ["libHSprimitive-0.6.1.0-DWCFovCQaj03LmIiVkz6kr.a","libHSprimitive-0.6.1.0-DWCFovCQaj03LmIiVkz6kr.p_a","libHSprimitive-0.6.1.0 -DWCFovCQaj03LmIiVkz6kr-ghc7.10.3.so","libHSprimitive-0.6.1.0 -DWCFovCQaj03LmIiVkz6kr-ghc7.10.3.dylib","HSprimitive-0.6.1.0 -DWCFovCQaj03LmIiVkz6kr-ghc7.10.3.dll"] on library path The following packages are broken, either because they have a problem listed above, or because they depend on a broken package. QuickCheck-2.8.2 primitive-0.6.1.0 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12904> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #12898: Upgrade Stack failed
by GHC 01 Dec '16

01 Dec '16

#12898: Upgrade Stack failed ----------------------------------------+---------------------------- Reporter: Bugger | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Keywords: | Operating System: MacOS X Architecture: Unknown/Multiple | Type of failure: Other Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: ----------------------------------------+---------------------------- (Please note that I am new here and not sure whether it is the right place to post this...) I was trying to do stack upgrade via shell and received following output (cf. attachement): As it links here with "Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug" I will just post it. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12898> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #1791: heap overflow should generate an exception
by GHC 01 Dec '16

01 Dec '16

#1791: heap overflow should generate an exception -------------------------------------+------------------------------------- Reporter: guest | Owner: Type: feature request | Status: new Priority: normal | Milestone: ⊥ Component: Runtime System | Version: 6.8 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: outofmem2 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonmar): There are a few questions to nail down, like under what precise conditions the exception is thrown, and to which threads. The actual implementation probably isn't all that difficult. Start by making a proposal? -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1791#comment:14> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #1791: heap overflow should generate an exception
by GHC 01 Dec '16

01 Dec '16

#1791: heap overflow should generate an exception -------------------------------------+------------------------------------- Reporter: guest | Owner: Type: feature request | Status: new Priority: normal | Milestone: ⊥ Component: Runtime System | Version: 6.8 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: outofmem2 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Description changed by rwbarton: @@ -0,0 +1,10 @@ + Heap overflow should produce a `HeapOverflow` exception that can be + caught, rather than shutting down the entire RTS immediately. + + [Original ticket description follows. The submitter happened to expose + another bug, which was that heap overflow was not detected at all when a + single allocation exceeded the maximum heap size. The program below now + exits with a "Heap exhausted" message.] + + ---- + New description: Heap overflow should produce a `HeapOverflow` exception that can be caught, rather than shutting down the entire RTS immediately. [Original ticket description follows. The submitter happened to expose another bug, which was that heap overflow was not detected at all when a single allocation exceeded the maximum heap size. The program below now exits with a "Heap exhausted" message.] ---- I want to use the -M option for the goals that are stated in the manual. {{{ ./TestProgram +RTS -M5m -RTS }}} Expected output: {{{ Something like "out of heap space" }}} Actual result: {{{ Machine going into a state where it swaps memory }}} This is the code for TestProgram: {{{ import Control.Monad.ST import Data.Array.ST import Data.Array.MArray import Data.Array.Base(unsafeNewArray_) main = print (runST (do make_empty_table >> return ())) make_empty_table:: ST s (STArray s (Int, Int) (Maybe ep)) make_empty_table = unsafeNewArray_ ((1, 1), (16384, 16384)) }}} This was tested with 6.9.20071018 on an athlon-xp, and confirmed by dcoutts also on x86-64 with ghc-6.8.0.20071015. -- -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1791#comment:13> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #12900: Common up identical info tables
by GHC 30 Nov '16

30 Nov '16

#12900: Common up identical info tables -------------------------------------+------------------------------------- Reporter: dobenour | Owner: Type: feature | Status: new request | Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Runtime Unknown/Multiple | performance bug Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Consider {{{#!hs data Bool' = No | Yes }}} It is clear that this is identical to `Bool` at runtime, and so GHC should be able to reuse `Bool`'s code. The same holds for all other pairs of isomorphic data types. I think that a **massive** space savings could be achieved this way. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12900> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #1791: heap overflow should generate an exception
by GHC 30 Nov '16

30 Nov '16

#1791: heap overflow should generate an exception -------------------------------------+------------------------------------- Reporter: guest | Owner: Type: feature request | Status: new Priority: normal | Milestone: ⊥ Component: Runtime System | Version: 6.8 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: outofmem2 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by dobenour): * cc: simonmar (added) Comment: How difficult would this be to actually implement? I can think of several valid use cases. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1791#comment:12> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #12843: Simplifier ticks exhausted When trying UnfoldingDone $
by GHC 30 Nov '16

30 Nov '16

#12843: Simplifier ticks exhausted When trying UnfoldingDone $ -------------------------------------+------------------------------------- Reporter: | Owner: MikolajKonarski | Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Keywords: | Operating System: Linux Architecture: | Type of failure: Compile-time Unknown/Multiple | crash or panic Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- {{{ [14 of 15] Compiling TieKnot ( GameDefinition/TieKnot.hs, dist/build/LambdaHack/LambdaHack-tmp/TieKnot.dyn_o ) ghc: panic! (the 'impossible' happened) (GHC version 8.0.1 for x86_64-unknown-linux): Simplifier ticks exhausted When trying UnfoldingDone $ 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: 8813 Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} when compiling in profiling mode the following commit (tons of INLINE and INLINABLE to ensure specialization and a couple more to debug irregularities in the output of the profiler) https://github.com/LambdaHack/LambdaHack/commit/842070fe78f07e2fb0bce829505… Steps to reproduce: {{{ 1. make configure-prof 2. cabal build }}} when I instead do {{{ cabal build --ghc-option=-fsimpl-tick-factor=200 }}} it compiles, though when I touch only `GameDefinition/Main.hs` I always get {{{ ~/r/LambdaHack$ cabal build --ghc-option=-fsimpl-tick-factor=200 Building LambdaHack-0.5.1.0... Preprocessing library LambdaHack-0.5.1.0... Preprocessing executable 'LambdaHack' for LambdaHack-0.5.1.0... [15 of 15] Compiling Main ( GameDefinition/Main.hs, dist/build/LambdaHack/LambdaHack-tmp/Main.dyn_o ) The interface for ‘TieKnot’ Declaration for tieKnot Unfolding of tieKnot: Iface id out of scope: standardKeys1 [15 of 15] Compiling Main ( GameDefinition/Main.hs, dist/build/LambdaHack/LambdaHack-tmp/Main.p_o ) The interface for ‘TieKnot’ Declaration for tieKnot Unfolding of tieKnot: Iface id out of scope: standardKeys1 Linking dist/build/LambdaHack/LambdaHack ... }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12843> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #10510: Testsuite driver does not run tests in parallel on Windows
by GHC 30 Nov '16

30 Nov '16

#10510: Testsuite driver does not run tests in parallel on Windows -------------------------------------+------------------------------------- Reporter: thomie | Owner: Type: bug | Status: new Priority: high | Milestone: Component: Test Suite | Version: 7.10.1 Keywords: | Operating System: Windows Architecture: | Type of failure: None/Unknown Unknown/Multiple | Blocked By: Test Case: | Related Tickets: Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- `testsuite/driver/runtests.py` contains the following 3 lines: {{{ if windows: print("Warning: Ignoring request to use threads as running on Windows") config.use_threads = 0 }}} They were introduced in commit e9b3d6cc65c0b69bd4a50bfa7bc7e1d3536446a8: {{{ Author: Ian Lynagh <> Date: Wed Oct 28 17:54:21 2009 +0000 Don't use threads on Windows It seems to cause some sort of deadlock }}} I tried removing them (Windows 64 bit, using msys2), but then running validate doesn't get any further than: {{{ ... =====> Overlap3(normal) 1605 of 4525 [2, 7, 0] =====> Overlap4(normal) 1606 of 4525 [2, 7, 0] =====> Overlap5(normal) 1607 of 4525 [2, 7, 0] =====> Overlap6(normal) 1608 of 4525 [2, 7, 0] =====> Overlap7(normal) 1609 of 4525 [2, 7, 0] =====> Overlap9(normal) 1610 of 4525 [2, 7, 0] }}} It would be great if we could run the testsuite in parallel again, since running validate takes forever currently. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10510> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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