June 2015 - ghc-tickets

[GHC] #10045: type holes related ghc panic
by GHC 04 Jan '16

04 Jan '16

#10045: type holes related ghc panic -------------------------------------+------------------------------------- Reporter: pacak | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.1-rc2 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Compile-time Unknown/Multiple | crash Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+------------------------------------- {{{ sample.hs:9:13: Couldn't match expected type ‘t’ with actual type ‘()’ ‘t’ is untouchable inside the constraints () bound by the inferred type of foo :: Meta -> t1 at sample.hs:(6,1)-(9,17)ghc: panic! (the 'impossible' happened) (GHC version 7.10.0.0 for x86_64-unknown-linux): No skolem info: t_avJ[sk] Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug sample.hs: module Blah where newtype Meta = Meta () foo (Meta ws1) = let copy :: _ copy w from = copy w 1 in copy ws1 1 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10045> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #10531: modules that can be linked successfully when compiled with optimizations, fail to link with: multiple definition of `__stginit_ZCMain'
by GHC 04 Jan '16

04 Jan '16

#10531: modules that can be linked successfully when compiled with optimizations, fail to link with: multiple definition of `__stginit_ZCMain' -------------------------------------+------------------------------------- Reporter: imz | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.1 Keywords: | Operating System: Linux Architecture: x86_64 | Type of failure: GHC rejects (amd64) | valid program Test Case: attached | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+------------------------------------- When compiling a set of 3 modules (in a certain order), linking of the final executable fails because there conflicting symbols in some of the `.o`. When doing the compilation in the same order, but with optimizations, it succeeds. The simple test case: A.hs: {{{#!hs module A where main :: IO () main = putStrLn "A" }}} B.hs: {{{#!hs module B where import A() main :: IO () main = putStrLn "B" }}} C.hs: {{{#!hs import B() main :: IO () main = putStrLn "hi" }}} When I compile it with in the order specified by the attached `./bug- reproduce.sh` and `Makefile`, the following happens: {{{ ./bug-reproduce.sh rm -fv a A.o A.hi removed 'a' removed 'A.o' removed 'A.hi' rm -fv b B.o B.hi removed 'b' removed 'B.o' removed 'B.hi' rm -fv c C.o C.hi removed 'c' removed 'C.o' removed 'C.hi' ghc -Wall A.hs -main-is A.main -o a [1 of 1] Compiling A ( A.hs, A.o ) Linking a ... ghc -Wall B.hs -main-is B.main -o b [1 of 2] Compiling A ( A.hs, A.o ) [flags changed] [2 of 2] Compiling B ( B.hs, B.o ) Linking b ... ghc -Wall C.hs -o c [2 of 3] Compiling B ( B.hs, B.o ) [flags changed] [3 of 3] Compiling Main ( C.hs, C.o ) Linking c ... removed 'A.o' ghc -Wall A.hs -main-is A.main -o a [1 of 1] Compiling A ( A.hs, A.o ) Linking a ... ghc -Wall B.hs -main-is B.main -o b [2 of 2] Compiling B ( B.hs, B.o ) [flags changed] Linking b ... ./A.o: In function `siv_closure': (.data+0x0): multiple definition of `__stginit_ZCMain' B.o:(.data+0x0): first defined here ./A.o: In function `ZCMain_main_srt': (.data+0x70): multiple definition of `ZCMain_main_closure' B.o:(.data+0x70): first defined here ./A.o:(.text+0xb8): multiple definition of `ZCMain_main_info' B.o:(.text+0xb8): first defined here collect2: error: ld returned 1 exit status make: *** [B.o] Error 1 }}} But it succeeds if done as `./bug-reproduce.sh GHC_OPTS=-O1` (probably, the optimizations remove the conflicting symbols): {{{ ./bug-reproduce.sh GHC_OPTS=-O1 rm -fv a A.o A.hi removed 'a' removed 'A.o' removed 'A.hi' rm -fv b B.o B.hi removed 'b' removed 'B.o' removed 'B.hi' rm -fv c C.o C.hi removed 'c' removed 'C.o' removed 'C.hi' ghc -Wall -O1 A.hs -main-is A.main -o a [1 of 1] Compiling A ( A.hs, A.o ) Linking a ... ghc -Wall -O1 B.hs -main-is B.main -o b [1 of 2] Compiling A ( A.hs, A.o ) [flags changed] [2 of 2] Compiling B ( B.hs, B.o ) Linking b ... ghc -Wall -O1 C.hs -o c [2 of 3] Compiling B ( B.hs, B.o ) [flags changed] [3 of 3] Compiling Main ( C.hs, C.o ) Linking c ... removed 'A.o' ghc -Wall -O1 A.hs -main-is A.main -o a [1 of 1] Compiling A ( A.hs, A.o ) Linking a ... ghc -Wall -O1 B.hs -main-is B.main -o b [1 of 2] Compiling A ( A.hs, A.o ) [flags changed] [2 of 2] Compiling B ( B.hs, B.o ) [flags changed] Linking b ... ghc -Wall -O1 C.hs -o c [2 of 3] Compiling B ( B.hs, B.o ) [flags changed] Linking c ... }}} Couldn't the compiler detect and handle such cases? -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10531> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #10379: Prefix syntax for promoted list kind isn't parsed properly
by GHC 04 Jan '16

04 Jan '16

#10379: Prefix syntax for promoted list kind isn't parsed properly -------------------------------------+------------------------------------- Reporter: cactus | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 7.10.1 (Parser) | Operating System: Unknown/Multiple Keywords: | Type of failure: GHC rejects Architecture: | valid program Unknown/Multiple | Blocked By: Test Case: | Related Tickets: Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- (Originally from https://stackoverflow.com/questions/27673578/) Given the following input file: {{{ {-# LANGUAGE KindSignatures, GADTs, DataKinds, TypeOperators #-} data Foo1 :: [*] -> * where data Foo2 :: ([] *) -> * where }}} it fails on the definition of `Foo2`: {{{ list-promote2.hs:4:16: parse error on input `]' }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10379> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #10554: Replacing existing attachment with the same name doesn't work
by GHC 04 Jan '16

04 Jan '16

#10554: Replacing existing attachment with the same name doesn't work -------------------------------------+------------------------------------- Reporter: thomie | Owner: hvr Type: bug | Status: new Priority: normal | Milestone: Component: Trac & Git | 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: | -------------------------------------+------------------------------------- -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10554> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9590: AMP breaks `haskell2010` package
by GHC 02 Jan '16

02 Jan '16

#9590: AMP breaks `haskell2010` package -------------------------------------+------------------------------------- Reporter: hvr | Owner: Type: bug | Status: new Priority: high | Milestone: 7.10.1 Component: | Version: 7.9 libraries/haskell2010 | Operating System: Keywords: AMP | Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: GHC Difficulty: Unknown | rejects valid program Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- (and probably also `haskell98`) I hate to be the one pointing this out, but the AMP has one ugly side- effect. Consider the following session: ``` $ inplace/bin/ghc-stage2 --interactive -XHaskell2010 -hide-all-packages -package haskell2010 GHCi, version 7.9.20140914: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim-0.3.1.0 ... linking ... done. Loading package integer-gmp-0.5.1.0 ... linking ... done. Loading package base-4.8.0.0 ... linking ... done. Loading package array-0.5.0.1 ... linking ... done. Loading package haskell2010-1.1.2.1 ... linking ... done. λ:2> data Identity a = Identity a data Identity a = Identity a λ:3> instance Monad Identity <interactive>:3:10: No instance for (base-4.8.0.0:GHC.Base.Applicative Identity) arising from the superclasses of an instance declaration In the instance declaration for ‘Monad Identity’ λ:4> :info Monad class base-4.8.0.0:GHC.Base.Applicative m => Monad (m :: * -> *) where (>>=) :: m a -> (a -> m b) -> m b (>>) :: m a -> m b -> m b return :: a -> m a fail :: String -> m a -- Defined in ‘base-4.8.0.0:GHC.Base’ instance Monad (Either e) -- Defined in ‘base-4.8.0.0:Data.Either’ instance Monad Maybe -- Defined in ‘base-4.8.0.0:Data.Maybe’ instance Monad [] -- Defined in ‘base-4.8.0.0:GHC.Base’ instance Monad IO -- Defined in ‘base-4.8.0.0:GHC.Base’ instance Monad ((->) r) -- Defined in ‘base-4.8.0.0:GHC.Base’ λ:5> ``` -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9590> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8182: Parser.y.pp needs special treatment with -fcmm-sink
by GHC 01 Jan '16

01 Jan '16

#8182: Parser.y.pp needs special treatment with -fcmm-sink ------------------------------------+------------------------------------- Reporter: thoughtpolice | Owner: thoughtpolice Type: bug | Status: new Priority: highest | Milestone: 7.8.1 Component: Build System | 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: | ------------------------------------+------------------------------------- This bug is really more of a reminder, but it's critical for the 7.8.1 release. Right now, `Parser.y.pp` uses a very weird hack to pass `-fcmm-sink` to the compiler. Here's the relevant comment: {{{ -- CPP tricks because we want the directives in the output of the -- first CPP pass. -- -- Clang note, 6/17/2013 by aseipp: It is *extremely* important (for -- some reason) that there be a line of whitespace between the two -- definitions here, and the subsequent use of __IF_GHC_77__ - this -- seems to be a bug in clang or something, where having the line of -- whitespace will make the preprocessor correctly format the rendered -- lines in the 'two step' CPP pass. No, this is not a joke. #define __IF_GHC_77__ #if __GLASGOW_HASKELL__ >= 707 #define __ENDIF__ #endif __IF_GHC_77__ -- Required on x86 to avoid the register allocator running out of -- stack slots when compiling this module with -fPIC -dynamic. {-# OPTIONS_GHC -fcmm-sink #-} __ENDIF__ }}} This is because the parser is first preprocessed before being run with GHC (which again preprocesses,) so we want the resulting `#ifdef` in the final `.hs` file. Things to note: * We really shouldn't be doing this, it's amazingly fragile. I think the correct thing to do is to ensure the build system correctly passes `-fcmm- sink` during the stage[2,3] build. * `./configure.ac` needs to check to see if the bootstrapping compiler is `ghc >= 7.7` (or `7.8`) and if it is, ''also'' pass `-fcmm-sink` during the stage1 build. * This hack needs to be removed once we can rely on >= 7.8 for bootstrap. Probably something like the hypothetical 7.12-7.14 timeframe. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8182> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9734: Provide macro __GLASGOW_HASKELL_TH__
by GHC 01 Jan '16

01 Jan '16

#9734: Provide macro __GLASGOW_HASKELL_TH__ -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: feature request | Status: new Priority: normal | Milestone: 7.10.1 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 Debian packaging added a few hacks to create a CPP macro that can be used to distinguish compilers with Template Haskell support from those that don’t have that support. We need this to compiler some code on non- TH architectures. It works, but we found that we cannot upstream such patches, which is a shame. I propose that among the GHC-defined macros listed at https://www.haskell.org/ghc/docs/latest/html/users_guide/options- phases.html#c-pre-processor there is also `__GLASGOW_HASKELL_TH__=YES`, which is available if the compiler supports splices, or ``__GLASGOW_HASKELL_TH__=NO` if not. (I propose a two-valued comparison so that library authors can decide themselves what the default should be if this symbol is not defined, some might want to use TH on older compilers, some not.) I hope this can be part of 7.10. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9734> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9237: GHC not recognizing "-llibrary" form in implicit linker scripts
by GHC 31 Dec '15

31 Dec '15

#9237: GHC not recognizing "-llibrary" form in implicit linker scripts ----------------------------------+--------------------------------------- Reporter: mmikolajczyk | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Keywords: | Operating System: Unknown/Multiple Architecture: x86_64 (amd64) | Type of failure: Compile-time crash Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ----------------------------------+--------------------------------------- I have tried to build accelerate-llvm package and encountered an invalid behaviour of linker. I am using Arch Linux and GHC 7.8.2. I have installed llvm-general-3.4.2.2 and llvm-general-pure-3.4.2.2 from this branch: https://github.com/tvh/llvm- general/tree/curatedTargetMachine, and accelerate from HEAD to common sandbox. Then I tried to build accelerate-llvm using the sandbox and got this output during building: {{{ Building accelerate-llvm-0.15.0.0... Preprocessing library accelerate-llvm-0.15.0.0... [ 1 of 30] Compiling Data.Range.Range ( Data/Range/Range.hs, dist/build/Data/Range/Range.o ) Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading package primitive-0.5.3.0 ... linking ... done. Loading package array-0.5.0.0 ... linking ... done. Loading package deepseq-1.3.0.2 ... linking ... done. Loading package old-locale-1.0.0.6 ... linking ... done. Loading package time-1.4.2 ... linking ... done. Loading package vector-0.10.11.0 ... linking ... done. Loading package mwc-random-0.13.1.2 ... linking ... done. Loading package bytestring-0.10.4.0 ... linking ... done. Loading package containers-0.5.5.1 ... linking ... done. Loading package transformers-0.4.1.0 ... linking ... done. Loading package mtl-2.2.1 ... linking ... done. Loading package text-1.1.1.3 ... linking ... done. Loading package parsec-3.1.5 ... linking ... done. Loading package unix-2.7.0.1 ... linking ... done. Loading package setenv-0.1.1.1 ... linking ... done. Loading package pretty-1.1.1.1 ... linking ... done. Loading package template-haskell ... linking ... done. Loading package llvm-general-pure-3.4.2.2 ... linking ... done. Loading package utf8-string-0.3.8 ... linking ... done. Loading package llvm-general-3.4.2.2 ... <command line>: can't load .so/.DLL for: /usr/lib/libcurses.so (-lncursesw: cannot open shared object file: No such file or directory) }}} After some searching I narrowed down the issue to `/usr/lib/libcurses.so` file. In Arch, this file contains `INPUT(-lncursesw)`. If I change it to `INPUT(libncursesw.so)` or `INPUT(/usr/lib/libncursesw.so)` it works fine. Symlinking `/usr/lib/libcurses.so` to `/usr/lib/libncursesw.so` also works. This bug seems to be connected to #2615. GHC still doesn't follow `INPUT` commands containing `-llibrary` form. Ld documentation allows this: {{{If you use `INPUT (-lfile)', ld will transform the name to libfile.a, as with the command line argument `-l'}}}. (https://sourceware.org/binutils/docs/ld/File-Commands.html) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9237> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9825: ghc "panic! (the 'impossible' happened)" building vimus on NixOS
by GHC 31 Dec '15

31 Dec '15

#9825: ghc "panic! (the 'impossible' happened)" building vimus on NixOS ----------------------------+--------------------------------------------- Reporter: jzellner | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Keywords: | Operating System: Linux Architecture: x86 | Type of failure: Compile-time crash Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: ----------------------------+--------------------------------------------- Hey there, I'm having trouble building vimus (https://github.com/vimus/vimus) on NixOS. The package builds fine locally for an x64 system, but is failing on i686 builds. On the NixOS builder: http://hydra.nixos.org/build/17512103/nixlog/2 {{{ [nix-shell:/tmp/build-17512103/vimus-0.2.0]$ ./Setup clean && ./Setup configure --enable-shared --enable-library-vanilla --enable-executable- dynamic --enable-tests --ghc- option=-optl=-Wl,-rpath=/nix/store/cgkfxxk1iz30fg0r3kf9dv2p550i5hn2-vimus-0.2.0/lib/ghc-7.8.3/vimus-0.2.0 --ghc-option=-j8 && ./Setup build cleaning... Configuring vimus-0.2.0... Building vimus-0.2.0... Preprocessing library vimus-0.2.0... [ 1 of 39] Compiling Constant ( dist/build/Constant.hs, dist/build/Constant.o ) [ 2 of 39] Compiling CursesUtil ( ncursesw/src/CursesUtil.hs, dist/build/CursesUtil.o ) [ 3 of 39] Compiling Timer ( src/Timer.hs, dist/build/Timer.o ) [ 4 of 39] Compiling UI.Curses.Type ( dist/build/UI/Curses/Type.hs, dist/build/UI/Curses/Type.o ) [ 5 of 39] Compiling Misc ( dist/build/Misc.hs, dist/build/Misc.o ) ncursesw/src/Misc.chs:7:1: Warning: The import of ‘Foreign.C.String’ is redundant except perhaps to import instances from ‘Foreign.C.String’ To import instances alone, use: import Foreign.C.String() ncursesw/src/Misc.chs:8:1: Warning: The import of ‘Foreign.Marshal.Alloc’ is redundant except perhaps to import instances from ‘Foreign.Marshal.Alloc’ To import instances alone, use: import Foreign.Marshal.Alloc() ncursesw/src/Misc.chs:9:1: Warning: The import of ‘Foreign.Storable’ is redundant except perhaps to import instances from ‘Foreign.Storable’ To import instances alone, use: import Foreign.Storable() ncursesw/src/Misc.chs:10:1: Warning: The import of ‘Foreign.ForeignPtr’ is redundant except perhaps to import instances from ‘Foreign.ForeignPtr’ To import instances alone, use: import Foreign.ForeignPtr() ncursesw/src/Misc.chs:12:1: Warning: The import of ‘Data.Char’ is redundant except perhaps to import instances from ‘Data.Char’ To import instances alone, use: import Data.Char() ncursesw/src/Misc.chs:29:1: Warning: Top-level binding with no type signature: cFromBool :: Bool -> Integer ncursesw/src/Misc.chs:29:13: Warning: Defaulting the following constraint(s) to type ‘Integer’ (Num a0) arising from a use of ‘fromBool’ In the expression: fromBool In an equation for ‘cFromBool’: cFromBool = fromBool ncursesw/src/Misc.chs:30:1: Warning: Top-level binding with no type signature: cToBool :: Integer -> Bool ncursesw/src/Misc.chs:30:13: Warning: Defaulting the following constraint(s) to type ‘Integer’ (Num a0) arising from a use of ‘toBool’ at ncursesw/src/Misc.chs:30:13-18 (Eq a0) arising from a use of ‘toBool’ at ncursesw/src/Misc.chs:30:13-18 In the expression: toBool In an equation for ‘cToBool’: cToBool = toBool ncursesw/src/Misc.chs:42:1: Warning: Top-level binding with no type signature: fromAttr :: Attr -> CInt ncursesw/src/Misc.chs:77:1: Warning: Top-level binding with no type signature: wcolor_set :: Window -> Int -> IO Status ncursesw/src/Misc.chs:86:1: Warning: Top-level binding with no type signature: wattr_off :: Window -> [Attribute] -> IO Status ncursesw/src/Misc.chs:90:1: Warning: Top-level binding with no type signature: wattr_on :: Window -> [Attribute] -> IO Status ncursesw/src/Misc.chs:98:1: Warning: Top-level binding with no type signature: wchgat :: Window -> Int -> [Attribute] -> Int -> IO Status ncursesw/src/Misc.chs:103:1: Warning: Top-level binding with no type signature: mvwchgat :: Window -> Int -> Int -> Int -> [Attribute] -> Int -> IO Status [ 6 of 39] Compiling CursesInput ( dist/build/CursesInput.hs, dist/build/CursesInput.o ) [ 7 of 39] Compiling Instances ( src/Instances.hs, dist/build/Instances.o ) [ 8 of 39] Compiling Data.List.Pointed ( src/Data/List/Pointed.hs, dist/build/Data/List/Pointed.o ) [ 9 of 39] Compiling Data.List.Zipper ( src/Data/List/Zipper.hs, dist/build/Data/List/Zipper.o ) [10 of 39] Compiling UI.Curses.Key ( dist/build/UI/Curses/Key.hs, dist/build/UI/Curses/Key.o ) [11 of 39] Compiling Vimus.Tab ( src/Vimus/Tab.hs, dist/build/Vimus/Tab.o ) [12 of 39] Compiling Vimus.Command.Parser ( src/Vimus/Command/Parser.hs, dist/build/Vimus/Command/Parser.o ) [13 of 39] Compiling Vimus.Key ( src/Vimus/Key.hs, dist/build/Vimus/Key.o ) [14 of 39] Compiling Paths_vimus ( dist/build/autogen/Paths_vimus.hs, dist/build/Paths_vimus.o ) [15 of 39] Compiling Vimus.Song ( src/Vimus/Song.hs, dist/build/Vimus/Song.o ) [16 of 39] Compiling Vimus.Song.Format ( src/Vimus/Song/Format.hs, dist/build/Vimus/Song/Format.o ) [17 of 39] Compiling Vimus.Queue ( src/Vimus/Queue.hs, dist/build/Vimus/Queue.o ) [18 of 39] Compiling Vimus.Util ( src/Vimus/Util.hs, dist/build/Vimus/Util.o ) [19 of 39] Compiling Option ( src/Option.hs, dist/build/Option.o ) [20 of 39] Compiling PlaybackState ( src/PlaybackState.hs, dist/build/PlaybackState.o ) [21 of 39] Compiling Curses ( dist/build/Curses.hs, dist/build/Curses.o ) ncursesw/src/Curses.chs:73:1: Warning: The import of ‘Foreign.C.String’ is redundant except perhaps to import instances from ‘Foreign.C.String’ To import instances alone, use: import Foreign.C.String() ncursesw/src/Curses.chs:76:1: Warning: The import of ‘chr’ from module ‘Data.Char’ is redundant ncursesw/src/Curses.chs:150:1: Warning: Defined but not used: ‘wnoutrefresh’ ncursesw/src/Curses.chs:151:1: Warning: Defined but not used: ‘doupdate’ ncursesw/src/Curses.chs:152:1: Warning: Defined but not used: ‘redrawwin’ ncursesw/src/Curses.chs:153:1: Warning: Defined but not used: ‘wredrawln’ ncursesw/src/Curses.chs:160:1: Warning: Defined but not used: ‘getparyx’ ncursesw/src/Curses.chs:207:1: Warning: Defined but not used: ‘cFromBool’ ncursesw/src/Curses.chs:207:1: Warning: Top-level binding with no type signature: cFromBool :: Bool -> Integer ncursesw/src/Curses.chs:207:13: Warning: Defaulting the following constraint(s) to type ‘Integer’ (Num a0) arising from a use of ‘fromBool’ In the expression: fromBool In an equation for ‘cFromBool’: cFromBool = fromBool ncursesw/src/Curses.chs:374:1: Warning: Defined but not used: ‘wnoutrefresh'_’ ncursesw/src/Curses.chs:377:1: Warning: Defined but not used: ‘doupdate'_’ ncursesw/src/Curses.chs:380:1: Warning: Defined but not used: ‘redrawwin'_’ ncursesw/src/Curses.chs:383:1: Warning: Defined but not used: ‘wredrawln'_’ ncursesw/src/Curses.chs:389:1: Warning: Defined but not used: ‘getparyx'_’ [22 of 39] Compiling UI.Curses ( ncursesw/src/UI/Curses.hs, dist/build/UI/Curses.o ) [23 of 39] Compiling Vimus.WindowLayout ( src/Vimus/WindowLayout.hs, dist/build/Vimus/WindowLayout.o ) [24 of 39] Compiling Vimus.Widget.Type ( src/Vimus/Widget/Type.hs, dist/build/Vimus/Widget/Type.o ) [25 of 39] Compiling Content ( src/Content.hs, dist/build/Content.o ) [26 of 39] Compiling Vimus.Input ( src/Vimus/Input.hs, dist/build/Vimus/Input.o ) [27 of 39] Compiling Vimus.Macro ( src/Vimus/Macro.hs, dist/build/Vimus/Macro.o ) [28 of 39] Compiling Vimus.Render ( src/Vimus/Render.hs, dist/build/Vimus/Render.o ) [29 of 39] Compiling Vimus.Ruler ( src/Vimus/Ruler.hs, dist/build/Vimus/Ruler.o ) [30 of 39] Compiling Vimus.Type ( src/Vimus/Type.hs, dist/build/Vimus/Type.o ) [31 of 39] Compiling Vimus.Command.Type ( src/Vimus/Command/Type.hs, dist/build/Vimus/Command/Type.o ) [32 of 39] Compiling Vimus.Command.Help ( src/Vimus/Command/Help.hs, dist/build/Vimus/Command/Help.o ) [33 of 39] Compiling Vimus.Command.Completion ( src/Vimus/Command/Completion.hs, dist/build/Vimus/Command/Completion.o ) [34 of 39] Compiling Vimus.Command.Core ( src/Vimus/Command/Core.hs, dist/build/Vimus/Command/Core.o ) [35 of 39] Compiling Vimus.Widget.ListWidget ( src/Vimus/Widget/ListWidget.hs, dist/build/Vimus/Widget/ListWidget.o ) [36 of 39] Compiling Vimus.Widget.TextWidget ( src/Vimus/Widget/TextWidget.hs, dist/build/Vimus/Widget/TextWidget.o ) [37 of 39] Compiling Vimus.Widget.HelpWidget ( src/Vimus/Widget/HelpWidget.hs, dist/build/Vimus/Widget/HelpWidget.o ) [38 of 39] Compiling Vimus.Command ( src/Vimus/Command.hs, dist/build/Vimus/Command.o ) Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading package array-0.5.0.0 ... linking ... done. Loading package deepseq-1.3.0.2 ... linking ... done. Loading package bytestring-0.10.4.0 ... linking ... done. Loading package containers-0.5.5.1 ... linking ... done. Loading package text-1.2.0.0 ... linking ... done. Loading package hashable-1.2.2.0 ... linking ... done. Loading package scientific-0.3.3.2 ... linking ... done. Loading package attoparsec-0.12.1.2 ... linking ... done. Loading package setlocale-1.0.0.1 ... linking ... done. Loading package utf8-string-0.3.8 ... linking ... done. Loading package wcwidth-0.0.2 ... linking ... done. Loading package pretty-1.1.1.1 ... linking ... done. Loading package template-haskell ... linking ... done. Loading package filepath-1.3.0.2 ... linking ... done. Loading package old-locale-1.0.0.6 ... linking ... done. Loading package time-1.4.2 ... linking ... done. Loading package unix-2.7.0.1 ... linking ... done. Loading package directory-1.2.1.0 ... linking ... done. Loading package process-1.2.0.0 ... linking ... done. Loading package data-default-class-0.0.1 ... linking ... done. Loading package data-default-instances-base-0.0.1 ... linking ... done. Loading package data-default-instances-containers-0.0.1 ... linking ... done. Loading package dlist-0.7.1 ... linking ... done. Loading package data-default-instances-dlist-0.0.1 ... linking ... done. Loading package data-default-instances-old-locale-0.0.1 ... linking ... done. Loading package data-default-0.5.3 ... linking ... done. Loading package transformers-0.3.0.0 ... linking ... done. Loading package mtl-2.1.3.1 ... linking ... done. Loading package network-2.6.0.2 ... linking ... done. Loading package libmpd-0.9.0.1 ... linking ... done. <no location info>: ghc: panic! (the 'impossible' happened) (GHC version 7.8.3 for i386-unknown-linux): Loading temp shared object failed: /tmp/ghc6364_1/ghc6364_192.so: undefined symbol: nm_getyx Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug [nix-shell:/tmp/build-17512103/vimus-0.2.0]$ nixos-version 14.11pre52840.c347f1c (Caterpillar) [nix-shell:/tmp/build-17512103/vimus-0.2.0]$ ghc --version The Glorious Glasgow Haskell Compilation System, version 7.8.3 [nix-shell:/tmp/build-17512103/vimus-0.2.0]$ uname -a Linux ip-10-83-15-102.us-west-2.compute.internal 3.12.30 #1-NixOS SMP Thu Jan 1 00:00:01 UTC 1970 x86_64 GNU/Linux }}} Thanks for any help! -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9825> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #10046: Linker script patch in rts/Linker.c doesn't work for (non-C or non-en..) locales
by GHC 31 Dec '15

31 Dec '15

#10046: Linker script patch in rts/Linker.c doesn't work for (non-C or non-en..) locales -------------------------------------+------------------------------------- Reporter: hgolden | Owner: simonmar Type: bug | Status: new Priority: normal | Milestone: 7.12.1 Component: Runtime | Version: 7.8.4 System | Operating System: Unknown/Multiple Keywords: linker | Type of failure: Incorrect result script | at runtime Architecture: | Blocked By: Unknown/Multiple | Related Tickets: 2615, 9237 Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Please see ticket:2615#comment:40 and replies. This error only occurs on systems where linker scripts are used. The linker script patch (as it has evolved) assumes that the error messages it will receive are in English. This would be true if the locale (LC_MESSAGES) is C or en (or one of the en variants). However, in other locales, the message will be in a different language. Unfortunately, the semantics of POSIX dlerror() specify that the error is returned as a pointer to a human-readable text string, rather than an error code. The string returned depends on the locale. The code could be made more robust by momentarily changing the locale (LC_MESSAGES) to C before calling dlerror() and reverting it to its previous value immediately after. This has been tested on a zh_CN.utf-8 (see ticket:2615#comment:42) and works. The only concern I have is in the case of multithreaded code that _might_ be affected if it is running while the locale is changed. I don't know enough to know if this is a real issue or not, nor do I know how to deal with it if necessary. Also see ticket:9237 for another corner case in the linker script code that should be dealt with at the same time. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10046> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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