December 2014 - ghc-tickets

Re: [GHC] #2742: The -> in ViewPatterns binds more weakly than infix data constructors.
by GHC 04 Dec '14

04 Dec '14

#2742: The -> in ViewPatterns binds more weakly than infix data constructors. -------------------------------------+------------------------------------- Reporter: guest | Owner: Type: feature | Status: new request | Milestone: ⊥ Priority: normal | Version: 6.10.1 Component: Compiler | Keywords: newcomer (Parser) | Architecture: Unknown/Multiple Resolution: | Difficulty: Unknown Operating System: | Blocked By: Unknown/Multiple | Related Tickets: Type of failure: | None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by nomeata): * keywords: => newcomer Comment: Marking as newcomer not because this is trivial, but because coming up with a solution (if there is one) should be possible without deep knowledge of GHC, and implementing it is also likely possible. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2742#comment:5> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2742: The -> in ViewPatterns binds more weakly than infix data constructors.
by GHC 04 Dec '14

04 Dec '14

#2742: The -> in ViewPatterns binds more weakly than infix data constructors. -------------------------------------+------------------------------------- Reporter: guest | Owner: Type: feature | Status: new request | Milestone: ⊥ Priority: normal | Version: 6.10.1 Component: Compiler | Keywords: (Parser) | Architecture: Unknown/Multiple Resolution: | Difficulty: Unknown Operating System: | Blocked By: Unknown/Multiple | Related Tickets: Type of failure: | None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thomie): * component: Compiler => Compiler (Parser) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2742#comment:4> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2836: Data.Typeable does not use qualified names
by GHC 04 Dec '14

04 Dec '14

#2836: Data.Typeable does not use qualified names -------------------------------------+------------------------------------- Reporter: guest | Owner: ekmett Type: feature | Status: new request | Milestone: 7.10.1 Priority: lowest | Version: 6.10.1 Component: Core | Keywords: Libraries | Architecture: Unknown/Multiple Resolution: | Difficulty: Unknown Operating System: | Blocked By: Unknown/Multiple | Related Tickets: Type of failure: | None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thomie): * cc: core-libraries-committee@… (added) * failure: => None/Unknown * component: Compiler => Core Libraries * owner: => ekmett -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2836#comment:12> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2896: Warning suggestion: argument not necessarily a binary operator
by GHC 04 Dec '14

04 Dec '14

#2896: Warning suggestion: argument not necessarily a binary operator -------------------------------------+------------------------------------- Reporter: porges | Owner: Type: feature | Status: new request | Milestone: ⊥ Priority: low | Version: 6.10.1 Component: Compiler | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: Incorrect | Related Tickets: warning at compile-time | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thomie): * failure: => Incorrect warning at compile-time -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2896#comment:3> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2926: Foreign exported function returns wrong type
by GHC 04 Dec '14

04 Dec '14

#2926: Foreign exported function returns wrong type -------------------------------------+------------------------------------- Reporter: fasta | Owner: Type: bug | Status: new Priority: low | Milestone: ⊥ Component: Compiler | Version: 6.10.1 (FFI) | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: #3238 None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thomie): * failure: => None/Unknown * related: => #3238 -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2926#comment:3> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2986: :info printing instances often isn't wanted
by GHC 04 Dec '14

04 Dec '14

#2986: :info printing instances often isn't wanted -------------------------------------+------------------------------------- Reporter: Remi | Owner: Remi Type: feature | Status: new request | Milestone: 7.10.1 Priority: lowest | Version: 6.10.1 Component: GHCi | Keywords: :info instances Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thomie): * cc: hvr (added) Comment: Replying to [comment:22 Remi]: > This is probably going to be the longest standing feature request ever, but half a year after losing the previous version of my patch I got around to creating a new one. Remi: do you have a link to your patch? Maybe someone else can finish it. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2986#comment:26> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2991: .tix file generation broken with -fhpc and --make flags with lhs modules (was: .mix files generation broken with -fhpc and --make flags with lhs modules)
by GHC 04 Dec '14

04 Dec '14

#2991: .tix file generation broken with -fhpc and --make flags with lhs modules -------------------------------------+------------------------------------- Reporter: ppavel | Owner: andy@… Type: bug | Status: new Priority: lowest | Milestone: 7.10.1 Component: Code | Version: 6.10.1 Coverage | Keywords: hpc make lhs Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thomie): * failure: => None/Unknown Old description: > assume the project consisting of two files: !Main.lhs and !MyModule.hs. > Main.lhs imports !MyModule via standard import. Build the project with > > ghc --make -fhpc -o main Main.lhs > > The generated .mix file contains relevant information and hpc markup > correctly shows the coverage for !MyModule. > > Now rename !MyModule.hs to !MyModule.lhs and enclose the code there in > \begin{code} / \end{code}. Build again. The compilation still succeeds > and the executable works fine. But !MyModule.mix now seems wrong and no > hpc coverage information is available for !MyModule New description: Assume the project consisting of two files: Main.lhs and MyModule.hs. Main.lhs imports MyModule via standard import. Build the project with ghc --make -fhpc -o main Main.lhs The generated .tix file contains relevant information and hpc markup correctly shows the coverage for MyModule. Now rename MyModule.hs to MyModule.lhs and enclose the code there in \begin{code} / \end{code}. Build again. The compilation still succeeds and the executable works fine. But main.tix now seems wrong and no hpc coverage information is available for MyModule -- Comment: I can reproduce this with HEAD or 7.8.3. Make sure `MyModule.lhs` is not empty. {{{ $ cat Main.lhs \begin{code} import MyModule main = return () \end{code} $ cat MyModule.lhs \begin{code} module MyModule where foo = undefined \end{code} $ ghc --make -fhpc -o main Main.lhs [1 of 2] Compiling MyModule ( MyModule.lhs, MyModule.o ) [2 of 2] Compiling Main ( Main.lhs, Main.o ) Linking main ... $ ./main $ cat main.tix Tix [ TixModule "Main" 1204325935 3 [0,1,1], TixModule "MyModule" 1288191418 0 []] }}} Notice the `0 []` for "MyModule". That should be `2 [0,0]`. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2991#comment:13> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #3191: hpc reports spurious results with .lhs files even after processing with ghc -E
by GHC 04 Dec '14

04 Dec '14

#3191: hpc reports spurious results with .lhs files even after processing with ghc -E -------------------------------------+------------------------------------- Reporter: dominic | Owner: andy@… Type: bug | Status: closed Priority: lowest | Milestone: 7.10.1 Component: Code | Version: 6.10.2 Coverage | Keywords: Resolution: worksforme | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by dominic): * status: infoneeded => closed * resolution: => worksforme Comment: Thanks for looking at this. I had completely forgotten about this not surprisingly as it is 6 years old. I no longer have access to ghc 6.12.3 and if you can't reproduce then I am going to close it. I can always open a new ticket if need be. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3191#comment:12> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #3085: warn about language extensions that are not used
by GHC 03 Dec '14

03 Dec '14

#3085: warn about language extensions that are not used -------------------------------------+------------------------------------- Reporter: | Owner: PVerswyvelen | Status: new Type: feature | Milestone: 7.10.1 request | Version: 6.10.1 Priority: normal | Keywords: warnings Component: Compiler | extensions language Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: #9757 None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by simonpj): I think it might be difficult, or at least tiresome, to implement this. In lots of places we test the language extension flags, to say {{{ if <extn-needed> and not extn-flag then raise error }}} To implement this feature, every such test would need to look more like {{{ if <extn-needed> then if <extn-flag-on> then record extn-flag-needed else raise error }}} Presumably the "record extn-flag-needed" is some kind of mutable state carried in the monad, accumulating which extensions are used. I'm sure it's possible, but the are ''many'' such tests, so you'd have to touch a lot of code. Simonb -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3085#comment:36> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #3055: Int / Word / IntN / WordN are unequally optimized
by GHC 03 Dec '14

03 Dec '14

#3055: Int / Word / IntN / WordN are unequally optimized -------------------------------------+------------------------------------- Reporter: claus | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.10.1 Component: Compiler | Version: 6.11 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: Runtime | Blocked By: performance bug | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thomie): * priority: lowest => normal -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3055#comment:14> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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