August 2014 - ghc-tickets

[GHC] #9259: GHCi should list its available command line options
by GHC 08 Jun '15

08 Jun '15

#9259: GHCi should list its available command line options -------------------------------------------+------------------------------- Reporter: jstolarek | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Driver | Version: Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Easy (less than 1 hour) | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: -------------------------------------------+------------------------------- GHC can now list its command line options with `--show-options` (#7843). GHCi should be able to do the same. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9259> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8244: Removing the Cabal dependency
by GHC 06 Jun '15

06 Jun '15

#8244: Removing the Cabal dependency ------------------------------------+------------------------------------- Reporter: nh2 | Owner: Type: bug | 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: | ------------------------------------+------------------------------------- GHC depends on cabal, which is so far has been problematic many times, for many reasons. A few discussions include: * http://www.haskell.org/pipermail/haskell-cafe/2013-September/108746.html * http://www.haskell.org/pipermail/ghc-devs/2013-March/000821.html GHC uses only a very small part of Cabal, in these files: {{{ ./compiler/ghci/Linker.lhs ./compiler/main/Packages.lhs ./compiler/main/PackageConfig.hs ./compiler/main/Finder.lhs }}} plus 1 file for ghc-pkg: ./utils/ghc-pkg/Main.hs (see http://www.haskell.org/pipermail/haskell-cafe/2013-September/108750.html for details). It was proposed that either * the package format could be a plain specification without direct code dependencies * the Cabal package could be split off into Cabal-the-build-system and a minimal part to describe the package DB to be shared by Cabal and GHC The Cabal part that is used is in only a few modules of Distribution.* while the remaining majority of the Cabal-the-library package is not used (e.g. none of Distribution.Simple.*). Decoupling GHC and Cabal seems to be a public desire, yet there are some problems with these approaches. Let us discuss them in this ticket. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8244> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8723: sdist should not have to build everything
by GHC 04 Jun '15

04 Jun '15

#8723: sdist should not have to build everything ----------------------------------------------+---------------------------- Reporter: nomeata | Owner: Type: task | Status: new Priority: low | Milestone: Component: Build System | Version: 7.6.3 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Moderate (less than a day) | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: ----------------------------------------------+---------------------------- It would be nice if instead of {{{ $ perl boot $ ./configure $ make $ make sdist }}} it would suffice to run {{{ $ perl boot $ ./configure $ make sdist }}} and if that would not build more than necessary to generate the tarballs. It would save time on the GHC-HEAD-Debian-Package-autobuilder that I am currently working on. I might look into this bug eventually, but if someone else feels like doing it: Even better. (Difficulty estimated conservatively; might well be less than an hour, besides maybe waiting for test runs to finish :-)) Remember to update MakingReleases and Building/StandardTargets if this is implemented. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8723> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9507: ghc-pkg mode to query by package-key
by GHC 04 Jun '15

04 Jun '15

#9507: ghc-pkg mode to query by package-key -------------------------------------+------------------------------------- Reporter: ezyang | Owner: ezyang Type: feature request | Status: new Priority: normal | Milestone: Component: ghc-pkg | Version: 7.9 Keywords: backpack | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Right now, ghc-pkg understands package names and IPIDs. It should support package keys too. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9507> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9506: Name libraries (dll/so) separately from linker symbols
by GHC 03 Jun '15

03 Jun '15

#9506: Name libraries (dll/so) separately from linker symbols -------------------------------------+------------------------------------- Reporter: ezyang | Owner: ezyang Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.9 Keywords: backpack | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Tracking ticket so I don't forget. Based on feedback on `#ghc`, it sounds like it would be helpful if library names on the file system only had their full package name, e.g. `libHScontainers_HASH.so` as opposed to the abbreviated package name. Additionally, it seems less necessary to provide the abbreviated package name in linker symbols, since the modules often give a pretty good clue (and the package key can be looked up.) So let's do this, and make things better for users. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9506> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8292: linker_unload test doesn't work on Windows
by GHC 31 May '15

31 May '15

#8292: linker_unload test doesn't work on Windows ------------------------------------+---------------------------------- Reporter: ezyang | Owner: simonmar Type: bug | Status: new Priority: normal | Milestone: Component: Test Suite | Version: 7.7 Keywords: | Operating System: Windows Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: linker_unload Blocked By: | Blocking: Related Tickets: | ------------------------------------+---------------------------------- I fixed up the major issues but I am getting: {{{ "/c/Users/ezyang/Dev/ghc-dyn/inplace/bin/ghc-stage2.exe" -fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-package-db -rtsopts -c Test.hs -v0 # -rtsopts causes a warning "/c/Users/ezyang/Dev/ghc-dyn/inplace/bin/ghc-stage2.exe" -fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-package-db linker_unload.c -o linker_unload -no-hs-main -optc-Werror ./linker_unload \Users\ezyang\Dev\ghc-dyn\libraries\base\dist- install\build/libHSbase-4.7.0.0.a \Users\ezyang\Dev\ghc-dyn\libraries\ghc-prim\dist-install\build/libHSghc- prim-0.3.1.0.a \Users \ezyang\Dev\ghc-dyn\libraries\integer-gmp\dist-install\build/libHSinteger- gmp-0.5.1.0.a linker_unload.exe: \Users\ezyang\Dev\ghc-dyn\libraries\base\dist- install\build/libHSbase-4.7.0. 0.a: unknown symbol `_select' }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8292> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8122: make binary-dist broken on OS X in HEAD
by GHC 26 May '15

26 May '15

#8122: make binary-dist broken on OS X in HEAD --------------------------------+------------------------------------------ Reporter: danharaj | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Build System | Version: 7.7 Keywords: | Operating System: MacOS X Architecture: x86_64 | Type of failure: Installing GHC failed (amd64) | Test Case: Difficulty: Unknown | Blocking: Blocked By: | Related Tickets: | --------------------------------+------------------------------------------ After a successful configure and make, make binary-dist fails: {{{ ➜ ghc git:(master) 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 make[1]: Nothing to be done for `all'. ➜ ghc git:(master) make binary-dist rm -f bindist-list make -r --no-print-directory -f ghc.mk bindist BINDIST=YES "cp" -p ghc/stage1/build/tmp/ inplace/lib/bin/ghc-stage1 cp: ghc/stage1/build/tmp/ is a directory (not copied). make[1]: *** [inplace/lib/bin/ghc-stage1] Error 1 make: *** [binary-dist-prep] Error 2 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8122> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8549: GHCI incorrectly link symbols defined with foreign import ccall
by GHC 23 May '15

23 May '15

#8549: GHCI incorrectly link symbols defined with foreign import ccall -------------------------+------------------------------------------------- Reporter: | Owner: qnikst | Status: new Type: bug | Milestone: Priority: | Version: 7.6.3 normal | Operating System: Unknown/Multiple Component: GHCi | Type of failure: GHCi crash Keywords: | Test Case: Architecture: | https://gist.github.com/qnikst/324a66914b3aba878be5 Unknown/Multiple | Blocking: Difficulty: | Unknown | Blocked By: | Related Tickets: | -------------------------+------------------------------------------------- I have a problem that ghci when loads modules that uses external symbols incorrectly links them, the problem is not reproducible if I'm compiling executable or load modules with :load command. As a result every Pointer value is equivalent to constant 0x0000fffffff225ff. A minimal example is in attached link, it contains a small package and description how to reproduce a bug. Problem is also reproduces on the ghc-HEAD. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8549> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #9219: Parallel build proceeds despite errors
by GHC 23 May '15

23 May '15

#9219: Parallel build proceeds despite errors -------------------------+------------------------------------------------- Reporter: | Owner: jstolarek | Status: new Type: bug | Milestone: Priority: | Version: 7.8.2 normal | Operating System: Unknown/Multiple Component: | Type of failure: Incorrect warning at Driver | compile-time Keywords: | Test Case: Architecture: | Blocking: Unknown/Multiple | Difficulty: | Unknown | Blocked By: | Related Tickets: | -------------------------+------------------------------------------------- A few weeks back during my work on singletons I got the following build log: {{{ Building singletons-1.0... Preprocessing library singletons-1.0... [ 6 of 45] Compiling Data.Singletons.Util ( src/Data/Singletons/Util.hs, dist/build/Data/Singletons/Util.o ) [ 7 of 45] Compiling Data.Singletons.Syntax ( src/Data/Singletons/Syntax.hs, dist/build/Data/Singletons/Syntax.o ) [Data.Singletons.Util changed] [ 8 of 45] Compiling Data.Singletons.Names ( src/Data/Singletons/Names.hs, dist/build/Data/Singletons/Names.o ) [Data.Singletons.Util changed] [ 9 of 45] Compiling Data.Singletons.Promote.Monad ( src/Data/Singletons/Promote/Monad.hs, dist/build/Data/Singletons/Promote/Monad.o ) [Data.Singletons.Util changed] [10 of 45] Compiling Data.Singletons.Single.Monad ( src/Data/Singletons/Single/Monad.hs, dist/build/Data/Singletons/Single/Monad.o ) [Data.Singletons.Promote.Monad changed] [11 of 45] Compiling Data.Singletons.Promote.Eq ( src/Data/Singletons/Promote/Eq.hs, dist/build/Data/Singletons/Promote/Eq.o ) [Data.Singletons.Util changed] [12 of 45] Compiling Data.Singletons.Promote.Ord ( src/Data/Singletons/Promote/Ord.hs, dist/build/Data/Singletons/Promote/Ord.o ) [Data.Singletons.Util changed] [13 of 45] Compiling Data.Singletons.Promote.Bounded ( src/Data/Singletons/Promote/Bounded.hs, dist/build/Data/Singletons/Promote/Bounded.o ) [Data.Singletons.Util changed] [14 of 45] Compiling Data.Singletons.Promote.Type ( src/Data/Singletons/Promote/Type.hs, dist/build/Data/Singletons/Promote/Type.o ) [Data.Singletons.Util changed] [15 of 45] Compiling Data.Singletons.Promote.Defun ( src/Data/Singletons/Promote/Defun.hs, dist/build/Data/Singletons/Promote/Defun.o ) [Data.Singletons.Promote.Monad changed] [16 of 45] Compiling Data.Singletons.Promote ( src/Data/Singletons/Promote.hs, dist/build/Data/Singletons/Promote.o ) [Data.Singletons.Promote.Defun changed] [17 of 45] Compiling Data.Promotion.Prelude.Bounded ( src/Data/Promotion/Prelude/Bounded.hs, dist/build/Data/Promotion/Prelude/Bounded.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 containers-0.5.5.1 ... linking ... done. Loading package transformers-0.3.0.0 ... linking ... done. Loading package mtl-2.1.2 ... linking ... done. Loading package syb-0.4.1 ... linking ... done. Loading package pretty-1.1.1.1 ... linking ... done. Loading package template-haskell ... linking ... done. Loading package th-desugar-1.4.0 ... linking ... done. src/Data/Promotion/Prelude/Bounded.hs:34:27: Not in scope: ‘boundedTypes’ src/Data/Promotion/Prelude/Bounded.hs:34:27: GHC stage restriction: ‘boundedTypes’ is used in a top-level splice or annotation, and must be imported, not defined locally In the first argument of ‘promoteBoundedInstances’, namely ‘boundedTypes’ In the expression: promoteBoundedInstances boundedTypes [18 of 45] Compiling Data.Singletons.Single.Type ( src/Data/Singletons/Single/Type.hs, dist/build/Data/Singletons/Single/Type.o ) [Data.Singletons.Single.Monad changed] [19 of 45] Compiling Data.Singletons.Single.Eq ( src/Data/Singletons/Single/Eq.hs, dist/build/Data/Singletons/Single/Eq.o ) [Data.Singletons.Util changed] [20 of 45] Compiling Data.Singletons.Single.Data ( src/Data/Singletons/Single/Data.hs, dist/build/Data/Singletons/Single/Data.o ) [Data.Singletons.Single.Monad changed] [21 of 45] Compiling Data.Singletons.Single ( src/Data/Singletons/Single.hs, dist/build/Data/Singletons/Single.o ) [Data.Singletons.Promote changed] [22 of 45] Compiling Data.Singletons.Prelude.Instances ( src/Data/Singletons/Prelude/Instances.hs, dist/build/Data/Singletons/Prelude/Instances.o ) [Data.Singletons.Single changed] [23 of 45] Compiling Data.Singletons.Prelude.Bool ( src/Data/Singletons/Prelude/Bool.hs, dist/build/Data/Singletons/Prelude/Bool.o ) [Data.Singletons.Prelude.Instances changed] [24 of 45] Compiling Data.Singletons.Prelude.Eq ( src/Data/Singletons/Prelude/Eq.hs, dist/build/Data/Singletons/Prelude/Eq.o ) [Data.Singletons.Prelude.Bool changed] [25 of 45] Compiling Data.Singletons.CustomStar ( src/Data/Singletons/CustomStar.hs, dist/build/Data/Singletons/CustomStar.o ) [Data.Singletons.Prelude.Bool changed] [26 of 45] Compiling Data.Promotion.Prelude.Eq ( src/Data/Promotion/Prelude/Eq.hs, dist/build/Data/Promotion/Prelude/Eq.o ) [Data.Singletons.Prelude.Eq changed] [27 of 45] Compiling Data.Promotion.Prelude.Bool ( src/Data/Promotion/Prelude/Bool.hs, dist/build/Data/Promotion/Prelude/Bool.o ) [Data.Singletons.Prelude.Bool changed] [28 of 45] Compiling Data.Singletons.TypeRepStar ( src/Data/Singletons/TypeRepStar.hs, dist/build/Data/Singletons/TypeRepStar.o ) [Data.Singletons.Prelude.Eq changed] [29 of 45] Compiling Data.Singletons.Prelude.Ord ( src/Data/Singletons/Prelude/Ord.hs, dist/build/Data/Singletons/Prelude/Ord.o ) [Data.Singletons.Prelude.Bool changed] [30 of 45] Compiling Data.Promotion.Prelude.Ord ( src/Data/Promotion/Prelude/Ord.hs, dist/build/Data/Promotion/Prelude/Ord.o ) [Data.Singletons.Prelude.Ord changed] [31 of 45] Compiling Data.Singletons.TypeLits ( src/Data/Singletons/TypeLits.hs, dist/build/Data/Singletons/TypeLits.o ) [Data.Singletons.Prelude.Bool changed] [32 of 45] Compiling Data.Singletons.TH ( src/Data/Singletons/TH.hs, dist/build/Data/Singletons/TH.o ) [Data.Singletons.Prelude.Bool changed] [33 of 45] Compiling Data.Singletons.Prelude.Base ( src/Data/Singletons/Prelude/Base.hs, dist/build/Data/Singletons/Prelude/Base.o ) [Data.Singletons.Prelude.Bool changed] [34 of 45] Compiling Data.Singletons.Prelude.Either ( src/Data/Singletons/Prelude/Either.hs, dist/build/Data/Singletons/Prelude/Either.o ) [Data.Singletons.Prelude.Base changed] [35 of 45] Compiling Data.Promotion.Prelude.Either ( src/Data/Promotion/Prelude/Either.hs, dist/build/Data/Promotion/Prelude/Either.o ) [Data.Singletons.Prelude.Either changed] [36 of 45] Compiling Data.Singletons.Prelude.Tuple ( src/Data/Singletons/Prelude/Tuple.hs, dist/build/Data/Singletons/Prelude/Tuple.o ) [Data.Singletons.Prelude.Instances changed] [37 of 45] Compiling Data.Promotion.Prelude.Tuple ( src/Data/Promotion/Prelude/Tuple.hs, dist/build/Data/Promotion/Prelude/Tuple.o ) [Data.Singletons.Prelude.Tuple changed] [38 of 45] Compiling Data.Promotion.Prelude.Base ( src/Data/Promotion/Prelude/Base.hs, dist/build/Data/Promotion/Prelude/Base.o ) [Data.Singletons.Prelude.Base changed] [39 of 45] Compiling Data.Singletons.Prelude.List ( src/Data/Singletons/Prelude/List.hs, dist/build/Data/Singletons/Prelude/List.o ) [Data.Singletons.Prelude.Base changed] [40 of 45] Compiling Data.Singletons.Prelude.Maybe ( src/Data/Singletons/Prelude/Maybe.hs, dist/build/Data/Singletons/Prelude/Maybe.o )[Data.Singletons.Prelude.Instances changed] [41 of 45] Compiling Data.Singletons.Prelude ( src/Data/Singletons/Prelude.hs, dist/build/Data/Singletons/Prelude.o ) [Data.Singletons.Prelude.Base changed] [42 of 45] Compiling Data.Promotion.Prelude.List ( src/Data/Promotion/Prelude/List.hs, dist/build/Data/Promotion/Prelude/List.o ) [Data.Promotion.Prelude.Ord changed] [43 of 45] Compiling Data.Promotion.Prelude.Maybe ( src/Data/Promotion/Prelude/Maybe.hs, dist/build/Data/Promotion/Prelude/Maybe.o ) [Data.Singletons.Prelude.Maybe changed] [45 of 45] Compiling Data.Promotion.TH ( src/Data/Promotion/TH.hs, dist/build/Data/Promotion/TH.o ) [Data.Singletons.Prelude.Bool changed] }}} Notice how file 18 of 45 fails to build and yet the build does not stop. It seems that while one thread fails the remaining ones pick up other files that can be compiled despite the failure. I'm not really sure if I'm against this design choice, but I'd certainly expect to get information that something went wrong during the build. Here I was confused when I realised that despite seemingly successful compilation my package was not built. Only after examining the build log I saw that one of the modules failed to build. This should be changed to clearly notify the user that compilation was not successful. PS. At first I thought this is cabal-install's fault, but [https://github.com/haskell/cabal/issues/1809 this was ruled out]. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9219> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8555: Simplify given `Coercible` constraints
by GHC 19 May '15

19 May '15

#8555: Simplify given `Coercible` constraints -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 7.7 checker) | Operating System: Unknown/Multiple Keywords: | Type of failure: GHC rejects Architecture: Unknown/Multiple | valid program Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #8503 | -------------------------------------+------------------------------------- It would be feasible and possibly useful if {{{ foo :: Coercible [a] [b] => a -> b foo = coerce }}} would work. This involve simplifying `CtGiven`s similar to how given (nominal) equalities are simplified. I’ll defer working on this, as it is not strictly required, it seems. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8555> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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