- ghc-tickets - Haskell.org

Re: [GHC] #2182: ghc sessions (--make, --interactive, ghc api) erroneously retain instances
by GHC 11 Nov '14

11 Nov '14

#2182: ghc sessions (--make, --interactive, ghc api) erroneously retain instances -------------------------------------+------------------------------------- Reporter: claus | Owner: Type: bug | Status: new Priority: low | Milestone: ⊥ Component: GHCi | Version: 6.9 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: | Blocked By: None/Unknown | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by ezyang): * cc: hvr (added) * failure: => None/Unknown Comment: #8427 is related; this ticket is basically the GHCi variant of the problem. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2182#comment:7> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8672: :browse and roles on typefamilies
by GHC 11 Nov '14

11 Nov '14

#8672: :browse and roles on typefamilies -------------------------------------+------------------------------------- Reporter: monoidal | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler (Type | Version: 7.7 checker) | Operating System: Unknown/Multiple Keywords: | Type of failure: Incorrect Architecture: Unknown/Multiple | warning at compile-time Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | -------------------------------------+------------------------------------- :browse on `ghci tests/ghci.debugger/scripts/T8557.hs` outputs a weird looking line: {{{ type role Sing nominal data family Sing (a :: k) type role T8557.R:Sing[]a nominal <-- data instance Sing a = SNil }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8672> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7602: Threaded RTS performing badly on recent OS X (10.8?)
by GHC 11 Nov '14

11 Nov '14

#7602: Threaded RTS performing badly on recent OS X (10.8?) -------------------------------------+------------------------------------- Reporter: simonmar | Owner: thoughtpolice Type: bug | Status: new Priority: high | Milestone: 7.10.1 Component: Runtime | Version: System | Keywords: thread-local Resolution: | state, TLS clang Operating System: MacOS X | Architecture: x86_64 (amd64) Type of failure: Runtime | Difficulty: Unknown performance bug | Blocked By: 7678 Test Case: | Related Tickets: Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by George): Was hoping to have this in the next Haskell Platform. A few months back the patch was coming soon. I assume there were problems. Are we still confident we know how to fix this? -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7602#comment:48> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9787: typo in the ghci help : 'simplifed'
by GHC 11 Nov '14

11 Nov '14

#9787: typo in the ghci help : 'simplifed' -------------------------------------+------------------------------------- Reporter: nicoder | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Documentation | 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: -------------------------------------+------------------------------------- Hello, I ran `ghci`at the command line and then `:?` and saw a typo in this line : :sprint [<name> ...] simplifed version of :print (I expected 'simplified' instead of 'simplifed'). Also, the line just above uses the present tense when the other lines use the imperative : :print [<name> ...] prints a value without forcing its computation A search on github ( https://github.com/ghc/ghc/search?utf8=%E2%9C%93&q=simplifed ) tells me the typo is probably still in the project source. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9787> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9643: ghci must be restarted to use break point more than once?
by GHC 11 Nov '14

11 Nov '14

#9643: ghci must be restarted to use break point more than once? -------------------------------------+------------------------------------- Reporter: dsamperi | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | 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: -------------------------------------+------------------------------------- When I set a break point (in main say) I stop there when I run the function, but if I run the function again the break point is ignored. Restarting ghci and resetting the break point makes it effective again, but this seems strange. Is this a bug or a feature? Also, when I run :trace after stopping at a break point, the remainder of the function is run, and :back complains that I cannot go backwards because I am not at a break point. Thanks, Dominick -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9643> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9666: runtime crashing with +RTS -w -h
by GHC 11 Nov '14

11 Nov '14

#9666: runtime crashing with +RTS -w -h -------------------------------------+------------------------------------- Reporter: lspitzner | Owner: simonmar Type: bug | Status: new Priority: low | Milestone: Component: Runtime System | Version: 7.8.3 Keywords: | Operating System: Linux Architecture: x86_64 (amd64) | Type of failure: Runtime Difficulty: Unknown | crash Blocked By: | Test Case: (see Related Tickets: | description) | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- A combination of the RTS flags -w and -h makes executables generated with ghc crash at runtime. Does not happen always; my current guess is that a gc run triggers the bug. Reproducible with the following input: '''Main.hs''' {{{#!hs module Main where import qualified Data.Map.Strict as M main = print $ M.lookup 10 $ M.fromList [ (i,i) | i<-[1..10000000] ] }}} {{{ > ghc -rtsopts Main.hs && ./Main +RTS -w -h [1 of 1] Compiling Main ( Main.hs, Main.o ) Linking Main ... Main: internal error: heapCensus, unknown object: 4093 (GHC version 7.8.3 for x86_64_unknown_linux) }}} optimization level did not change the outcome. I am aware that -w is marked experimental, and I don't need it. Just noticed the crashing. @simon: you get added to Cc (one more time) every time I press "preview", it seems. Doubt that is intentional.. I'll leave you in Cc just so you get this message. (hmm.. where is the bug-tracker bug-tracker..) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9666> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9683: ghc: panic! (the 'impossible' happened) [Cant do annotations without GHCi]
by GHC 11 Nov '14

11 Nov '14

#9683: ghc: panic! (the 'impossible' happened) [Cant do annotations without GHCi] -----------------------------+--------------------------------------- Reporter: jeffmaner | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.4.1 Keywords: | Operating System: Linux Architecture: arm | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -----------------------------+--------------------------------------- The Haskell Platform instructed me to report this as a bug. :) I'm trying to install The Haskell Platform on my Samsung Chromebook, using the wheezy chroot (armv7l GNU/Linux). Actually, I'm trying to install Elm. I've installed the Platform. Installing Elm via `cabal install Elm-0.13 elm-repl-0.3 elm-reactor-0.1 elm-get-0.1.3` , I eventually encounter: [ 3 of 19] Compiling Data.Vector.Fusion.Stream.Size ( Data/Vector/Fusion/Stream/Size.hs, dist/build/Data/Vector/Fusion/Stream/Size.o ) Data/Vector/Fusion/Stream/Size.hs:25:10: Warning: No explicit method nor default method for `*' In the instance declaration for `Num Size' Data/Vector/Fusion/Stream/Size.hs:25:10: Warning: No explicit method nor default method for `abs' In the instance declaration for `Num Size' Data/Vector/Fusion/Stream/Size.hs:25:10: Warning: No explicit method nor default method for `signum' In the instance declaration for `Num Size' [ 4 of 19] Compiling Data.Vector.Internal.Check ( Data/Vector/Internal/Check.hs, dist/build/Data/Vector/Internal/Check.o ) [ 5 of 19] Compiling Data.Vector.Fusion.Stream.Monadic ( Data/Vector/Fusion/Stream/Monadic.hs, dist/build/Data/Vector/Fusion/Stream/Monadic.o ) ghc: panic! (the 'impossible' happened) (GHC version 7.4.1 for arm-unknown-linux): Cant do annotations without GHCi {Data/Vector/Fusion/Stream/Monadic.hs:104:19-33} base:GHC.Exts.ForceSpecConstr{d raqj} Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9683> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9073: small SPECIALIZE INLINE program taking gigabytes of memory to compile
by GHC 10 Nov '14

10 Nov '14

#9073: small SPECIALIZE INLINE program taking gigabytes of memory to compile -------------------------+------------------------------------------------- Reporter: dagit | Owner: Type: bug | Status: new Priority: | Milestone: normal | Version: 7.8.2 Component: | Operating System: Unknown/Multiple Compiler | Type of failure: Compile-time performance bug Keywords: | Test Case: Architecture: | Blocking: Unknown/Multiple | Difficulty: | Unknown | Blocked By: | Related Tickets: | -------------------------+------------------------------------------------- I have a small program that is taking 1+ GB of memory to compile. I've distilled the troublesome input down to the following: {{{ {-# LANGUAGE BangPatterns #-} import Data.Vector knot :: Vector Double -> Int -> Double knot vs k = vs ! idx0 where !idx0 = abs k `mod` 16 {-# SPECIALIZE INLINE knot :: Vector Double -> Int -> Double #-} noise :: Vector Double -> Int -> Double noise vs k = knot vs k + knot vs k + knot vs k + knot vs k + knot vs k + knot vs k + knot vs k + knot vs k }}} Compiled with `ghc -fprof-auto -prof -O2 -Wall`. As far as I can tell, prof-auto, prof, and optimizations of at least -O1 are required to trigger it. I'm using ghc-7.8.2 64bit for Windows. vector is version 0.10.9.1 (currently the latest on hackage). Same code worked fine on ghc 7.6.2. Also worth noting: Even though the `SPECIALIZE` isn't needed, if you remove the `SPECIALIZE` or the `INLINE` the problem goes away. If you remove even one of the duplicated calls to `knot vs k` in the body of `noise` then the amount of memory required drops dramatically. Add more to increase the requirements. I've been able to push it up around 10 GB, but I don't have enough memory to test beyond that! Thanks! -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9073> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7862: Could not deduce (A) from the context (A, ...)
by GHC 09 Nov '14

09 Nov '14

#7862: Could not deduce (A) from the context (A, ...) -------------------------------------+------------------------------------- Reporter: alang9 | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 (Type checker) | Keywords: Resolution: | Architecture: x86_64 (amd64) Operating System: Linux | Difficulty: Unknown Type of failure: GHC | Blocked By: rejects valid program | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by goldfire): The problem in comment:5 is unrelated to the original bug report -- it is a !PolyKinds issue. If you turn on `-fprint-explicit-kinds`, you get {{{ Could not deduce (Category k2 (Morphisms (k -> k -> *) k2 * c)) arising from a use of ‘Control.Category.id’ from the context (Category k c, Category k1 (Morphisms (k -> k -> *) k1 * c)) bound by the instance declaration at Scratch.hs:30:10-64 or from (Objects (k -> k -> *) k2 c a) bound by the type signature for id :: (Objects (k -> k -> *) k2 c a) => Morphisms (k -> k -> *) k2 * c a a at Scratch.hs:33:5-6 In the expression: Control.Category.id In an equation for ‘id’: id = Control.Category.id In the instance declaration for ‘SmallCategory (k -> k -> *) c’ }}} and you can see a more sensible error message. What would be nice here is a note suggesting to turn on `-fprint-explicit- kinds`. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7862#comment:7> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9513: Building GHC on Windows
by GHC 09 Nov '14

09 Nov '14

#9513: Building GHC on Windows -------------------------------------+------------------------------------- Reporter: srutownik | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Build System | Version: 7.8.3 Keywords: | Operating System: Architecture: x86_64 (amd64) | Unknown/Multiple Difficulty: Unknown | Type of failure: Building Blocked By: | GHC failed Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- I am trying to build GHC 7.8.3 on my computer, but in final phase of building it fails. I have downloaded both packages with sources, one with compiler and minimal set of libraries, second with extra building tools required on Windows. I have unzipped files to same folder. I was following instructions given in your wiki. I installed required tools and set PATH variable. Next I run ./configure and it finished successfully, but when I have executed make, it has stopped with errors In a block below there is an output of make. {{{ ===--- building phase 0 make -r --no-print-directory -f ghc.mk phase=0 phase_0_builds make[1]: Nothing to be done for `phase_0_builds'. ===--- building phase 1 make -r --no-print-directory -f ghc.mk phase=1 phase_1_builds make[1]: Nothing to be done for `phase_1_builds'. ===--- building final phase make -r --no-print-directory -f ghc.mk phase=final all driver/ghci/ghc.mk:39: driver/ghci/dist/build/.depend.c_asm: No such file or directory rts/ghc.mk:515: rts/dist/build/.depend-v-p-l-debug-thr-thr_debug-thr_l- thr_p.c_asm: No such file or directory libraries/old-time/ghc.mk:5: libraries/old-time/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/old-time/ghc.mk:5: libraries/old-time/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/haskell98/ghc.mk:5: libraries/haskell98/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/haskell98/ghc.mk:5: libraries/haskell98/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/haskell2010/ghc.mk:5: libraries/haskell2010/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/haskell2010/ghc.mk:5: libraries/haskell2010/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/ghc-prim/ghc.mk:4: libraries/ghc-prim/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/ghc-prim/ghc.mk:4: libraries/ghc-prim/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/integer-gmp/ghc.mk:4: libraries/integer-gmp/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/integer-gmp/ghc.mk:4: libraries/integer-gmp/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/base/ghc.mk:4: libraries/base/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/base/ghc.mk:4: libraries/base/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/filepath/ghc.mk:4: libraries/filepath/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/filepath/ghc.mk:4: libraries/filepath/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/array/ghc.mk:4: libraries/array/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/array/ghc.mk:4: libraries/array/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/deepseq/ghc.mk:4: libraries/deepseq/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/deepseq/ghc.mk:4: libraries/deepseq/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/bytestring/ghc.mk:4: libraries/bytestring/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/bytestring/ghc.mk:4: libraries/bytestring/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/containers/ghc.mk:4: libraries/containers/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/containers/ghc.mk:4: libraries/containers/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/old-locale/ghc.mk:4: libraries/old-locale/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/old-locale/ghc.mk:4: libraries/old-locale/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/Win32/ghc.mk:4: libraries/Win32/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/Win32/ghc.mk:4: libraries/Win32/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/time/ghc.mk:4: libraries/time/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/time/ghc.mk:4: libraries/time/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/directory/ghc.mk:4: libraries/directory/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/directory/ghc.mk:4: libraries/directory/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/process/ghc.mk:4: libraries/process/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/process/ghc.mk:4: libraries/process/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/hpc/ghc.mk:4: libraries/hpc/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/hpc/ghc.mk:4: libraries/hpc/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/pretty/ghc.mk:4: libraries/pretty/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/pretty/ghc.mk:4: libraries/pretty/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/template-haskell/ghc.mk:4: libraries/template-haskell/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/template-haskell/ghc.mk:4: libraries/template-haskell/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/Cabal/Cabal/ghc.mk:4: libraries/Cabal/Cabal/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/Cabal/Cabal/ghc.mk:4: libraries/Cabal/Cabal/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/binary/ghc.mk:4: libraries/binary/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/binary/ghc.mk:4: libraries/binary/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/bin-package-db/ghc.mk:4: libraries/bin-package-db/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/bin-package-db/ghc.mk:4: libraries/bin-package-db/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/hoopl/ghc.mk:4: libraries/hoopl/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/hoopl/ghc.mk:4: libraries/hoopl/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/transformers/ghc.mk:4: libraries/transformers/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/transformers/ghc.mk:4: libraries/transformers/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/xhtml/ghc.mk:4: libraries/xhtml/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/xhtml/ghc.mk:4: libraries/xhtml/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/haskeline/ghc.mk:4: libraries/haskeline/dist- install/build/.depend-v-p.haskell: No such file or directory libraries/haskeline/ghc.mk:4: libraries/haskeline/dist- install/build/.depend-v-p.c_asm: No such file or directory libraries/integer-gmp/mkGmpDerivedConstants/ghc.mk:20: libraries/integer- gmp/mkGmpDerivedConstants/dist/build/.depend.c_asm: No such file or directory utils/haddock/ghc.mk:15: utils/haddock/dist/build/.depend.haskell: No such file or directory utils/haddock/ghc.mk:15: utils/haddock/dist/build/.depend.c_asm: No such file or directory compiler/ghc.mk:640: compiler/stage2/build/.depend-v-p.haskell: No such file or directory make -C libffi/build MAKEFLAGS= install MAKE i686-pc-mingw32 : 0 * install make[3]: Entering directory `/c/ghc-7.8.3/libffi/build/i386-unknown- mingw32' Making install in include make[4]: Entering directory `/c/ghc-7.8.3/libffi/build/i386-unknown- mingw32/include' make[5]: Entering directory `/c/ghc-7.8.3/libffi/build/i386-unknown- mingw32/include' make[5]: Nothing to be done for `install-exec-am'. test -z "c:/ghc-7.8.3/libffi/build/inst/lib/libffi-3.0.11/include" || /c/MinGHC/msys/1.0/bin/mkdir -p "c:/ghc-7.8.3/libffi/build/inst/lib/libffi-3.0.11/include" ../install-sh -c -m 644 ffi.h ffitarget.h 'c:/ghc-7.8.3/libffi/build/inst/lib/libffi-3.0.11/include' /bin/sh: line 7: ../install-sh: No such file or directory make[5]: *** [install-nodist_includesHEADERS] Error 127 make[5]: Leaving directory `/c/ghc-7.8.3/libffi/build/i386-unknown- mingw32/include' make[4]: *** [install-am] Error 2 make[4]: Leaving directory `/c/ghc-7.8.3/libffi/build/i386-unknown- mingw32/include' make[3]: *** [install-recursive] Error 1 make[3]: Leaving directory `/c/ghc-7.8.3/libffi/build/i386-unknown- mingw32' make[2]: *** [install] Error 2 make[1]: *** [libffi/stamp.ffi.static.install] Error 2 make: *** [all] Error 2 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9513> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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