April 2013 - ghc-tickets

Re: [GHC] #5620: Dynamic linking and threading does not work on Windows
by GHC 07 Apr '13

07 Apr '13

#5620: Dynamic linking and threading does not work on Windows -------------------------------+-------------------------------------------- Reporter: Lennart | Owner: igloo Type: bug | Status: new Priority: high | Milestone: 7.6.2 Component: Runtime System | Version: 7.2.1 Keywords: | Os: Windows Architecture: x86 | Failure: Runtime crash Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | -------------------------------+-------------------------------------------- Changes (by ihameed): * cc: idhameed@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5620#comment:12> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #910: --make should have a -j flag for parallel building
by GHC 07 Apr '13

07 Apr '13

#910: --make should have a -j flag for parallel building -------------------------------+-------------------------------------------- Reporter: igloo | Owner: Type: feature request | Status: new Priority: normal | Milestone: _|_ Component: Compiler | Version: 6.4.2 Resolution: | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: None/Unknown | Difficulty: Unknown Testcase: N/A | Blockedby: Blocking: | Related: -------------------------------+-------------------------------------------- Changes (by nh2): * cc: mail@… (added) Comment: Can somebody give an idea about the difficulty of this? From an outsider's view, GHC has a very clear idea about module dependencies and in which order it has to build them so building independent modules in parallel shouldn't be too hard, should it? -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/910#comment:16> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #427: Random.StdGen slowness
by GHC 06 Apr '13

06 Apr '13

#427: Random.StdGen slowness --------------------------------------+------------------------------------- Reporter: remit | Owner: rrnewton Type: bug | Status: new Priority: normal | Milestone: _|_ Component: libraries/random | Version: Resolution: None | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: Runtime performance bug | Difficulty: Unknown Testcase: | Blockedby: Blocking: | Related: --------------------------------------+------------------------------------- Comment(by simonpj): Would someone like to look at this, please? It sounds as if most of the thinking is done; it just needs someone to take an hour to read the thread, think it through, make the change, test it carefully, send a patch. Thanks Simon -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/427#comment:21> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2439: Missed optimisation with dictionaries and loops
by GHC 06 Apr '13

06 Apr '13

#2439: Missed optimisation with dictionaries and loops ---------------------------------+------------------------------------------ Reporter: rl | Owner: simonpj Type: bug | Status: new Priority: lowest | Milestone: 7.6.2 Component: Compiler | Version: 6.9 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Runtime performance bug Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Comment(by simonpj): Can you explain eaxtly how making single-method classes be a data type would break edward's library? And example where forcing a single method would be bad: {{{ class C a where foo :: a instance C Int where foo = undefined bar :: C a => Int -> Int bar x = x main = print (bar (3 :: Int)) }}} -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2439#comment:19> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #5916: runST isn't free
by GHC 06 Apr '13

06 Apr '13

#5916: runST isn't free ---------------------------------+------------------------------------------ Reporter: tibbe | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.6.2 Component: Compiler | Version: 7.4.1 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by carter): * cc: carter.schonwald@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5916#comment:10> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #5642: Deriving Generic of a big type takes a long time and lots of space
by GHC 06 Apr '13

06 Apr '13

#5642: Deriving Generic of a big type takes a long time and lots of space ---------------------------------+------------------------------------------ Reporter: basvandijk | Owner: dimitris Type: bug | Status: new Priority: high | Milestone: 7.6.2 Component: Compiler | Version: 7.3 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Compile-time performance bug Difficulty: Unknown | Testcase: T5642 Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by carter): * cc: carter.schonwald@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5642#comment:17> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7346: Allow the use of `deriving` for GHC generics
by GHC 06 Apr '13

06 Apr '13

#7346: Allow the use of `deriving` for GHC generics ---------------------------------+------------------------------------------ Reporter: kosmikus | Owner: dreixel Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.7 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by carter): * cc: carter.schonwald@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7346#comment:8> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2439: Missed optimisation with dictionaries and loops
by GHC 06 Apr '13

06 Apr '13

#2439: Missed optimisation with dictionaries and loops ---------------------------------+------------------------------------------ Reporter: rl | Owner: simonpj Type: bug | Status: new Priority: lowest | Milestone: 7.6.2 Component: Compiler | Version: 6.9 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Runtime performance bug Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by carter): * cc: carter.schonwald@… (added) Comment: @simon changing the single method type class encoding would break edwardk's reflection library http://hackage.haskell.org/package/reflection (which exploits that newtype encoding for single method type classes) Is there a natural example where forcing that single method to whnf (if you mean that form of strictness) would be bad? -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2439#comment:18> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #6018: Injective type families
by GHC 05 Apr '13

05 Apr '13

#6018: Injective type families ----------------------------------------+----------------------------------- Reporter: lunaris | Owner: simonpj Type: feature request | Status: new Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.4.1 Keywords: TypeFamilies, Injective | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: #4259 | ----------------------------------------+----------------------------------- Comment(by morabbin): It turns out I was missing -XscopedTypeVariables. I'm still interested in injective type families, but it's not a blocker (and Manuel and Andrew's code still compiles). -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6018#comment:17> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #6018: Injective type families
by GHC 05 Apr '13

05 Apr '13

#6018: Injective type families ----------------------------------------+----------------------------------- Reporter: lunaris | Owner: simonpj Type: feature request | Status: new Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.4.1 Keywords: TypeFamilies, Injective | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: #4259 | ----------------------------------------+----------------------------------- Comment(by simonpj): Andy, No version of GHC had injective families. If you have code that you think should work, and used to, and doesn't now, by all means submit a but report! Simon -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6018#comment:16> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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