April 2014 - ghc-tickets

[GHC] #8415: GHC bug using darcs on Kubuntu 13.04
by GHC 18 Nov '14

18 Nov '14

#8415: GHC bug using darcs on Kubuntu 13.04 ----------------------------------+------------------------------------- Reporter: JoeAquilina | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: x86_64 (amd64) | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ----------------------------------+------------------------------------- I was trying to push a darcs patch when it failed with a GHC error. This is the text of the error message on the console: darcs: internal error: evacuate: strange closure type 536064 (GHC version 7.6.2 for x86_64_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug Aborted (core dumped) Not sure if this is exactly what is required when reporting a bug, I am very new to this and am unsure of the procedures involved regarding GHC bug reporting. Thanks in advance. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8415> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8419: add rawSystem variant that takes an environment
by GHC 18 Nov '14

18 Nov '14

#8419: add rawSystem variant that takes an environment -------------------------------------+------------------------------------- Reporter: dagit | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: libraries/process | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | -------------------------------------+------------------------------------- rawSystem properly handles the case of ^C while waiting. Instead of requiring people to recreate this behavior when using runProcess, it would be good if we add and export a rawSystemWithEnv or directly export syncProcess. See for example: https://github.com/haskell/cabal/issues/1448 -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8419> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8420: Spurious dynamic library dependencies
by GHC 18 Nov '14

18 Nov '14

#8420: Spurious dynamic library dependencies ------------------------------------+--------------------------------- Reporter: AndreasVoellmy | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: MacOS X Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+--------------------------------- It should be possible to have an executable A that depends on dynamic library B which in turn depends on dynamic library C, without A directly depending on C. {{{ A --> B --> C }}} Unfortunately, GHC 7.6.3 does not seem to allow this. Instead it copies the dependencies of B to dependencies of A, so that we get {{{ A -> B,C and B --> C }}} This is unfortunately, because running A will cause the loader to locate C based on the rpaths (assuming we are using rpaths to locate dynamic libraries), whereas only B should know how to get to C from B. The problem seems to be that ghc copies all the library dependencies of B (presumably from the package specification of B) as library dependencies of the A. I verified the problem in GHC 7.6.3, but haven't tried in HEAD yet. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8420> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8447: A combination of type-level comparison and subtraction does not work for 0
by GHC 18 Nov '14

18 Nov '14

#8447: A combination of type-level comparison and subtraction does not work for 0 -------------------------------------+------------------------------------- Reporter: nushio | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler (Type | Version: 7.6.3 checker) | Operating System: Linux Keywords: | Type of failure: GHC rejects Architecture: Unknown/Multiple | valid program Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | -------------------------------------+------------------------------------- The following function on type level naturals {{{ Diff x y = If (x <=? y) (y-x) (x-y) }}} does not work when either x or y is 0. https://github.com/nushio3/practice/blob/ea8a1716b1d6221ce32d77432b6de3f38e… /type-nats/int-bug.hs I've tested this code on ghc 7.7.20130926 since I couldn't build the really latest ghc. I'm sorry if it is already fixed on the ghc head. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8447> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8442: Cabal-install internal error with any use
by GHC 18 Nov '14

18 Nov '14

#8442: Cabal-install internal error with any use ----------------------------------+--------------------------------- Reporter: senk | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Package system | Version: 7.6.3 Keywords: | Operating System: FreeBSD Architecture: x86_64 (amd64) | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ----------------------------------+--------------------------------- Any attempt to use cabal-install fails with an internal error. Used FreeBSD (9.1) port hs-haskell-platform and built with hs-colour support, LLVM (3.2) backend, and profiling enabled. Warnings were given that the version of LLVM used was untested, but no issues were apparent when compiling. {{{ cabal install hakyll cabal-install: internal error: evacuate(static): strange closure type -385875968 (GHC version 7.6.3 for x86_64_portbld_freebsd) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug Abort trap }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8442> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8465: ./configure fails on ghc-7.6.3: does not find installed libgmp.so.3 and current directory
by GHC 18 Nov '14

18 Nov '14

#8465: ./configure fails on ghc-7.6.3: does not find installed libgmp.so.3 and current directory ------------------------------------+------------------------------------- Reporter: ygramoel | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Build System | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- I am trying to reproduce bug #8464 with the newest ghc; not available in my repositories, so I am trying to install it manually. With a freshly downloaded and unpacked ghc-7.6.3-x86_64-unknown- linux.tar.bz2, and after cleanly installing libgmp.3 (from source of gmp-4.3.1) johan@morla:~/work/ghc-7.6.3\> ./configure checking for path to top of build tree... utils/ghc-pwd/dist- install/build/tmp/ghc-pwd: error while loading shared libraries: libgmp.so.3: cannot open shared object file: No such file or directory configure: error: cannot determine current directory johan@morla:~/work/ghc-7.6.3\> pwd -P /home/johan/work/ghc-7.6.3 johan@morla:~/work/ghc-7.6.3\> whereis libgmp libgmp: /usr/local/lib/libgmp.la /usr/local/lib/libgmp.a /usr/local/lib/libgmp.so johan@morla:~/work/ghc-7.6.3\> ls -l /usr/local/lib/libgmp* -rw-r--r-- 1 root root 1017334 Oct 20 20:56 /usr/local/lib/libgmp.a -rwxr-xr-x 1 root root 785 Oct 20 20:56 /usr/local/lib/libgmp.la lrwxrwxrwx 1 root root 15 Oct 20 20:56 /usr/local/lib/libgmp.so -> libgmp.so.3.5.0 lrwxrwxrwx 1 root root 15 Oct 20 20:56 /usr/local/lib/libgmp.so.3 -> libgmp.so.3.5.0 -rwxr-xr-x 1 root root 403890 Oct 20 20:56 /usr/local/lib/libgmp.so.3.5.0 johan@morla:~/work/ghc-7.6.3\> -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8465> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8477: Allow inferring ambiguous types
by GHC 18 Nov '14

18 Nov '14

#8477: Allow inferring ambiguous types ------------------------------------+------------------------------------- Reporter: aavogt | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: 8390 | ------------------------------------+------------------------------------- Previous versions of ghc could infer types that are potentially ambiguous. This allowed things like http://okmij.org/ftp/Haskell/TypeLambdaVal.hs or assigning keyword args functions to variables http://code.haskell.org/~aavogt/HList/docs/HList/Data-HList-Keyword.html. Presently (7.6 and 7.7), you need to write a type signature yourself to allow such definitions, which in these situations doubles the amount of code to write. For the keyword case, the workaround is to use the kw function to apply the keyword function instead of ordinary function application. More related discussion http://www.haskell.org/pipermail/glasgow-haskell- users/2013-October/024404.html -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8477> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8490: OS X 10.9 gcc-4.8 unknown symbol `__objc_empty_table`
by GHC 18 Nov '14

18 Nov '14

#8490: OS X 10.9 gcc-4.8 unknown symbol `__objc_empty_table` ----------------------------------+--------------------------------------- Reporter: jloos | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: MacOS X Architecture: x86_64 (amd64) | Type of failure: Compile-time crash Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ----------------------------------+--------------------------------------- I'm not sure if and how far the ghc-7.6.3 support for OS X is planned, but I hit a (possible) linker error with 7.6.3. I installed a homebrew gcc-4.8 and changed the ghc config to use it. I tried to compile the [http://hackage.haskell.org/package/bindings-GLFW bindings-GLFW] package, which was successful, and run `cabal test` on it, which fails with following error: {{{ final link ... ghc: lookupSymbol failed in relocateSection (relocate external) dist/build/HSbindings-GLFW-3.0.3.o: unknown symbol `__objc_empty_vtable' linking extra libraries/objects failed }}} After some research I discovered that this symbol (surely just the first which fails) is part of the Objective-C Runtime. The /usr/lib/libobjc.dylib exports this symbol. In desperation I think I nearly reached the google quota with my research, further steps I tried: Explicitly link the libobjc lib {{{ ghci -lobjc dist/build/HSbindings-GLFW-3.0.3.o -framework Foundation -framework Cocoa -framework IOKit }}} With the same result as above: {{{ GHCi, version 7.6.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading object (static) dist/build/HSbindings-GLFW-3.0.3.o ... done Loading object (dynamic) /usr/lib/libobjc.dylib ... done Loading object (framework) IOKit ... done Loading object (framework) Cocoa ... done Loading object (framework) Foundation ... done final link ... ghc: lookupSymbol failed in relocateSection (relocate external) dist/build/HSbindings-GLFW-3.0.3.o: unknown symbol `__objc_empty_vtable' linking extra libraries/objects failed }}} I found a [https://github.com/mxcl/homebrew/issues/23687 homebrew issue] related to gcc and the Apple switch from libstdc++to libc++ in 10.9 and i tried to force linking with explicit `-stdlib=libstdc++` in the cabal file (ld-options). But i guess this issue isn't related to the `__objc_***` problem, just tried it in desperation. Last week I managed to build ghc HEAD with clang bootstrapped with 7.4.6: the new linker mechanic seems to resolves this problem in a way (sadly some other packages aren't jet compatible with 7.8) So I'm not sure if this report is okay, if not, pardon me :) I'm aware of the problems with the current ghc-7.6.3 and the the changes OS X 10.9 brings with it (according to reddit/haskell cafe). The current suggestions is to not use the XCode-5.0.1/clang together with ghc-7.6.3. So I tried gcc from homebrew. I know that 7.8 will bring better linker capabilities, maybe there are just some flags to fix this specific problem with 7.6.3...? I didn't find it. So I thought it's better to report it. If further informations are required, I will try to provide them as fast as possible but I will have to downgrade to 10.8 tomorrow around 6 a.m. UTC. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8490> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8511: GHCi Startup Crash with GHC 7.6.3 / HP 2013.2.0.0 64bit on OS X 10.6
by GHC 18 Nov '14

18 Nov '14

#8511: GHCi Startup Crash with GHC 7.6.3 / HP 2013.2.0.0 64bit on OS X 10.6 ----------------------------------+------------------------------- Reporter: blitzcode | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: MacOS X Architecture: x86_64 (amd64) | Type of failure: GHCi crash Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ----------------------------------+------------------------------- A couple of HP / GHC releases later this bug still seems to exist: http://ghc.haskell.org/trac/ghc/ticket/6138 32bit works fine, 64bit GHCi crashes frequently on startup, even with XCode 4.1 installed. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8511> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8517: Add library function retrieve label set by GHC.Conc.Sync.labelThread
by GHC 18 Nov '14

18 Nov '14

#8517: Add library function retrieve label set by GHC.Conc.Sync.labelThread ------------------------------------+------------------------------------- Reporter: blitzcode | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: libraries/base | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- It would be useful to be able to retrieve the label set by the labelThread function. For instance, a logging / tracing system could output a human readable string for the thread the trace originated from instead of just the thread ID. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8517> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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