January 2013 - ghc-tickets

Re: [GHC] #605: Optimisation: strict enumerations
by GHC 23 Jan '13

23 Jan '13

#605: Optimisation: strict enumerations --------------------------------------+------------------------------------- Reporter: simonmar | Owner: Type: task | Status: new Priority: normal | Milestone: _|_ Component: Compiler | Version: None Resolution: None | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: Runtime performance bug | Difficulty: Difficult (2-5 days) Testcase: N/A | Blockedby: Blocking: | Related: #6135 --------------------------------------+------------------------------------- Changes (by dterei): * related: => #6135 -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/605#comment:19> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #6135: Unboxed Booleans
by GHC 23 Jan '13

23 Jan '13

#6135: Unboxed Booleans ---------------------------------+------------------------------------------ Reporter: benl | Owner: Type: feature request | Status: new Priority: normal | 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: #605 | ---------------------------------+------------------------------------------ Changes (by dterei): * related: 605 => #605 -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6135#comment:9> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #6135: Unboxed Booleans
by GHC 23 Jan '13

23 Jan '13

#6135: Unboxed Booleans ---------------------------------+------------------------------------------ Reporter: benl | Owner: Type: feature request | Status: new Priority: normal | 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: 605 | ---------------------------------+------------------------------------------ Changes (by dterei): * related: => 605 -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6135#comment:8> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #605: Optimisation: strict enumerations
by GHC 23 Jan '13

23 Jan '13

#605: Optimisation: strict enumerations --------------------------------------+------------------------------------- Reporter: simonmar | Owner: Type: task | Status: new Priority: normal | Milestone: _|_ Component: Compiler | Version: None Resolution: None | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: Runtime performance bug | Difficulty: Difficult (2-5 days) Testcase: N/A | Blockedby: Blocking: | Related: --------------------------------------+------------------------------------- Changes (by dterei): * cc: dterei (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/605#comment:18> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #6135: Unboxed Booleans
by GHC 23 Jan '13

23 Jan '13

#6135: Unboxed Booleans ---------------------------------+------------------------------------------ Reporter: benl | Owner: Type: feature request | Status: new Priority: normal | 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 dterei): * cc: dterei (added) -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6135#comment:7> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #1544: Derived Read instances for recursive datatypes with infix constructors are too inefficient
by GHC 23 Jan '13

23 Jan '13

#1544: Derived Read instances for recursive datatypes with infix constructors are too inefficient -------------------------------------+-------------------------------------- Reporter: jcpetruzza@… | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.6.2 Component: Compiler | Version: 6.6.1 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Other Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | -------------------------------------+-------------------------------------- Changes (by Doaitse): * failure: None/Unknown => Other Comment: When checking I noticed that the ChristmasTree package had problems compiling with the newer versions of GHC. I updated the package by adding some type annotations, and upgrading the cabal file. The fact that we did not get complaints thus far probably indicates that the problem is not perceived as a severe one by most users. I have no idea how many actually rely on this package or this technology. It would be nice if hackage would inform maintains about packages becoming obsolete due to upgrades of GHC or of packages it depends on, but that is another issue. -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1544#comment:29> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #1547: Arity can decrease with -prof
by GHC 23 Jan '13

23 Jan '13

#1547: Arity can decrease with -prof ----------------------------------------+----------------------------------- Reporter: igloo | Owner: Type: bug | Status: closed Priority: normal | Milestone: _|_ Component: Profiling | Version: 6.6.1 Resolution: wontfix | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: None/Unknown | Difficulty: Unknown Testcase: stm package/tests/conc052 | Blockedby: Blocking: | Related: ----------------------------------------+----------------------------------- Changes (by simonmar): * status: new => closed * resolution: => wontfix Comment: We know there are several problems with the current way that arity is calculated too early, and we plan to refactor things so that arity is calculated after CorePrep instead, which would fix this bug. Hence I don't think there's much to be gained by keeping the ticket open. It's unlikely we'll want to fix this bug in isolation. -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1547#comment:8> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #1532: Implicit parameters are not available in breakpoints
by GHC 23 Jan '13

23 Jan '13

#1532: Implicit parameters are not available in breakpoints ---------------------------------+------------------------------------------ Reporter: mnislaih | Owner: Type: feature request | Status: new Priority: normal | Milestone: _|_ Component: GHCi | Version: 6.7 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Difficulty: Unknown | Testcase: break015 Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Comment(by simonmar): Still a bug. -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1532#comment:7> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #1171: GHC doesn't respect the imprecise exceptions semantics
by GHC 23 Jan '13

23 Jan '13

#1171: GHC doesn't respect the imprecise exceptions semantics -------------------------------+-------------------------------------------- Reporter: neil | Owner: Type: bug | Status: new Priority: low | Milestone: _|_ Component: Compiler | Version: 6.6 Resolution: | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: None/Unknown | Difficulty: Unknown Testcase: cg059 | Blockedby: Blocking: | Related: -------------------------------+-------------------------------------------- Comment(by simonmar): Replying to [comment:16 morabbin]: > This reads like a misunderstanding of the semantics described in the paper; close as wontfix? There really is a mismatch between the semantics in the paper and what GHC implements, so I think it's good to keep the ticket open. Simon knows the full details, but as I understand it we think that the semantics should take into account the reordering that the strictness analyser does (ie. GHC is right, the semantics is wrong). -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1171#comment:17> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0

Re: [GHC] #7049: LLVM backend miscompiles GHC stage2
by GHC 23 Jan '13

23 Jan '13

#7049: LLVM backend miscompiles GHC stage2 ---------------------------------+------------------------------------------ Reporter: kgardas | Owner: dterei Type: bug | Status: infoneeded Priority: normal | Milestone: 7.8.1 Component: Compiler (LLVM) | Version: 7.5 Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: Building GHC failed Difficulty: Unknown | Testcase: Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by dterei): * status: new => infoneeded Comment: kgardas are you able to confirm if this bug still occurs? I've fixed a fair few bugs lately and suspect I may have solved this issue.... -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7049#comment:3> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

1 0