March 2013 - ghc-tickets

Re: [GHC] #2255: Improve SpecConstr for free variables
by GHC 26 Mar '13

26 Mar '13

#2255: Improve SpecConstr for free variables ---------------------------------+------------------------------------------ Reporter: simonpj | Owner: Type: bug | Status: new Priority: normal | Milestone: _|_ Component: Compiler | Version: 6.8.2 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Runtime performance bug Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by nfrisby): * cc: nfrisby (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2255#comment:4> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #7795: panic! the impossible happened
by GHC 26 Mar '13

26 Mar '13

#7795: panic! the impossible happened -------------------------+-------------------------------------------------- Reporter: guest | Owner: Type: bug | Status: new Priority: normal | Component: GHCi Version: 7.4.2 | Keywords: Os: Windows | Architecture: Unknown/Multiple Failure: None/Unknown | Blockedby: Blocking: | Related: -------------------------+-------------------------------------------------- Got the following in ghch *Calc> :l Calc [1 of 1] Compiling Calc ( Calc.hs, interpreted ) ghc.exe: panic! (the 'impossible' happened) (GHC version 7.4.2 for i386-unknown-mingw32): nameModule show{tv a17H} Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug -------------------- compiling the following code -------------------- module Calc where --Type for my calculation list data CalcExp = Operator Op | Number Integer deriving (show) -- Number type --data Number = Number Integer -- Operator type data Op = Mlt | Dvd | Add | Sbt -- Operator function operate :: CalcExp -> CalcExp -> CalcExp -> Integer operate (Operator Mlt) (Number a) (Number b) = a * b operate (Operator Dvd) (Number a) (Number b) = div a b operate (Operator Add) (Number a) (Number b) = a + b operate (Operator Sbt) (Number a) (Number b) = a - b -- Do calcultation --calc :: [CalcExp] -> [CalcExp] -> Integer -- Resulve calc rCalc :: [CalcExp] -> Integer rCalc (exps) = rCalc' exps [] where rCalc' :: [CalcExp] -> [CalcExp] -> Integer rCalc' ((Operator op):exps) ((Number nA):(Number nB):[]) = operate (Operator op) (Number nA) (Number nB) rCalc' ((Operator op):exps) ((Number nA):(Number nB):stack) = rCalc' exps ((Number (operate (Operator op) (Number nA) (Number nB))):stack) rCalc' ((Number n):exps) (stack) = rCalc' exps ((Number n):stack) rCalc' (a) (b) = error "Calculation failed" -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7795> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7553: ghc fails to terminate with -O2 or greater
by GHC 26 Mar '13

26 Mar '13

#7553: ghc fails to terminate with -O2 or greater ---------------------------------+------------------------------------------ Reporter: erikd | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.1 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Compile-time crash Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by liyang): * cc: hackage.haskell.org@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7553#comment:8> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #3583: Default view patterns
by GHC 25 Mar '13

25 Mar '13

#3583: Default view patterns -------------------------------------------+-------------------------------- Reporter: ksf | Owner: Type: feature request | Status: new Priority: normal | Milestone: _|_ Component: Compiler | Version: 6.10.4 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Moderate (less than a day) | Testcase: Blockedby: | Blocking: Related: | -------------------------------------------+-------------------------------- Changes (by liyang): * cc: hackage.haskell.org@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3583#comment:12> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #5763: Confusing error message
by GHC 25 Mar '13

25 Mar '13

#5763: Confusing error message ---------------------------------+------------------------------------------ Reporter: simonpj | Owner: simonpj Type: bug | Status: new Priority: high | Milestone: 7.6.2 Component: Compiler | Version: 7.2.2 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: indexed-types/should_fail/T5763 Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by liyang): * cc: hackage.haskell.org@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5763#comment:5> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #5859: unsafeInterleaveIO duplicates computation when evaluated by multiple threads
by GHC 25 Mar '13

25 Mar '13

#5859: unsafeInterleaveIO duplicates computation when evaluated by multiple threads ---------------------------------+------------------------------------------ Reporter: joeyadams | Owner: simonpj Type: bug | Status: new Priority: high | Milestone: 7.6.2 Component: libraries/base | Version: 7.2.2 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Incorrect result at runtime Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by liyang): * cc: hackage.haskell.org@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5859#comment:9> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #6022: GHC infers over-general types
by GHC 25 Mar '13

25 Mar '13

#6022: GHC infers over-general types ---------------------------------+------------------------------------------ Reporter: simonpj | Owner: simonpj Type: bug | Status: new Priority: high | Milestone: 7.8.1 Component: Compiler | Version: 7.4.1 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by liyang): * cc: hackage.haskell.org@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6022#comment:6> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #6147: GeneralizedNewtypeDeriving should fail with data families
by GHC 25 Mar '13

25 Mar '13

#6147: GeneralizedNewtypeDeriving should fail with data families ----------------------------------------+----------------------------------- Reporter: rl | Owner: simonpj Type: bug | Status: new Priority: high | Milestone: 7.8.1 Component: Compiler (Type checker) | Version: 7.2.1 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: GHC accepts invalid program Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ----------------------------------------+----------------------------------- Changes (by liyang): * cc: hackage.haskell.org@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6147#comment:5> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #7152: Add flag to configure that skips overwriting of symlinks on install
by GHC 25 Mar '13

25 Mar '13

#7152: Add flag to configure that skips overwriting of symlinks on install ---------------------------------+------------------------------------------ Reporter: tibbe | Owner: Type: bug | Status: new Priority: high | Milestone: 7.8.1 Component: Build System | Version: 7.4.2 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by liyang): * cc: hackage.haskell.org@… (added) Comment: I install different versions to /usr/local/ghc/ghc-x.y.z and have a bunch of bash functions/aliases that prepend the selected version to $PATH &c. If we're going to allow multiple versioned binaries to be installed directly to /usr (which would be nice), we'll want some way to choose between them too, cf. gcc_select on OS X, in which case we should also figure out how that'd interact with say Debian's update-alternatives(8). -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7152#comment:2> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #855: Improvements to SpecConstr
by GHC 25 Mar '13

25 Mar '13

#855: Improvements to SpecConstr ---------------------------------+------------------------------------------ Reporter: simonpj | Owner: Type: task | Status: new Priority: normal | Milestone: _|_ Component: Compiler | Version: 6.4.2 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: N/A Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by liyang): * cc: hackage.haskell.org@… (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/855#comment:6> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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