November 2013 - ghc-tickets

[GHC] #8203: Yesod platform fails to build on ARM
by GHC 18 Nov '13

18 Nov '13

#8203: Yesod platform fails to build on ARM -----------------------------+--------------------------------- Reporter: randomist | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.4.1 Keywords: | Operating System: Linux Architecture: arm | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | -----------------------------+--------------------------------- Trying to build yesod platform on Samsung Chromebook (architecture is armv7l), and get this crash in compiling the package vector-0.10.0.1: [ 5 of 19] Compiling Data.Vector.Fusion.Stream.Monadic ( Data/Vector/Fusion/Stream/Monadic.hs, dist/build/Data/Vector/Fusion/Stream/Monadic.o ) ghc: panic! (the 'impossible' happened) (GHC version 7.4.1 for arm-unknown-linux): Cant do annotations without GHCi {Data/Vector/Fusion/Stream/Monadic.hs:104:19-33} base:GHC.Exts.ForceSpecConstr{d ra42} Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8203> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #1600: Optimisation: CPR the results of IO
by GHC 18 Nov '13

18 Nov '13

#1600: Optimisation: CPR the results of IO -------------------------------------+------------------------------------- Reporter: simonmar | Owner: Type: task | Status: new Priority: lowest | Milestone: 7.6.2 Component: Compiler | Version: 6.6.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: Runtime | Difficulty: Moderate (less performance bug | than a day) Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------- Changes (by nomeata): * cc: mail@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1600#comment:16> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2387: Optimizer misses unboxing opportunity
by GHC 18 Nov '13

18 Nov '13

#2387: Optimizer misses unboxing opportunity -------------------------------------+------------------------------------- Reporter: dolio | Owner: Type: bug | Status: new Priority: lowest | Milestone: 7.6.2 Component: Compiler | Version: 6.8.2 Resolution: | Keywords: optimizer unbox Operating System: Linux | box Type of failure: Runtime | Architecture: x86_64 (amd64) performance bug | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: #2289 -------------------------------------+------------------------------------- Changes (by nomeata): * cc: mail@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2387#comment:16> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #2289: Needless reboxing of values when returning from a tight loop
by GHC 18 Nov '13

18 Nov '13

#2289: Needless reboxing of values when returning from a tight loop -------------------------------------+------------------------------------- Reporter: dons | Owner: Type: bug | Status: new Priority: lowest | Milestone: 7.6.2 Component: Compiler | Version: 6.8.2 Resolution: | Keywords: boxing, loops, Operating System: Unknown/Multiple | performance Type of failure: Runtime | Architecture: Unknown/Multiple performance bug | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: #2387,#1600 -------------------------------------+------------------------------------- Changes (by nomeata): * cc: mail@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/2289#comment:37> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8339: Build fails with panic in vector
by GHC 18 Nov '13

18 Nov '13

#8339: Build fails with panic in vector ----------------------------------+---------------------------------------- Reporter: trommler | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: libraries | Version: 7.7 (other) | Operating System: Unknown/Multiple Keywords: vector | Type of failure: Building GHC failed annotation | Test Case: Architecture: | Blocking: Unknown/Multiple | Difficulty: Unknown | Blocked By: | Related Tickets: #8203 #8212 | ----------------------------------+---------------------------------------- I get this on powerpc64 Linux but I suspect from the error message it affects all architectures without GHCi support: {{{"inplace/bin/ghc-stage2" -hisuf hi -osuf o -hcsuf hc -static -H32m -O -package-name vector-0.9.1 -hide-all-packages -i -ilibraries/vector/. -ilibraries/vector/dist-install/build -ilibraries/vector/dist- install/build/autogen -Ilibraries/vector/dist-install/build -Ilibraries/vector/dist-install/build/autogen -Ilibraries/vector/include -Ilibraries/vector/internal -optP-DVECTOR_BOUNDS_CHECKS -optP-include -optPlibraries/vector/dist-install/build/autogen/cabal_macros.h -package base-4.7.0.0 -package ghc-prim-0.3.1.0 -package primitive-0.4.0.1 -O2 -XHaskell98 -XCPP -XDeriveDataTypeable -O2 -no-user-package-db -rtsopts -odir libraries/vector/dist-install/build -hidir libraries/vector/dist- install/build -stubdir libraries/vector/dist-install/build -c libraries/vector/./Data/Vector/Fusion/Stream/Monadic.hs -o libraries/vector/dist-install/build/Data/Vector/Fusion/Stream/Monadic.o ghc-stage2: panic! (the 'impossible' happened) (GHC version 7.7.20130828 for powerpc64-unknown-linux): Cant do annotations without GHCi {libraries/vector/Data/Vector/Fusion/Stream/Monadic.hs:104:19-33} base:GHC.Exts.ForceSpecConstr{d rcn} Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug}}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8339> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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[GHC] #8535: :info (->) doesn't print all relevant instances
by GHC 18 Nov '13

18 Nov '13

#8535: :info (->) doesn't print all relevant instances ------------------------------------+------------------------------------- Reporter: parcs | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | 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: | ------------------------------------+------------------------------------- I noticed that ":info (->)" does not does not print all relevant instances, specifically instances whose heads use `->` in an infix way. For example, {{{ $ ghci -v0 Prelude> import Data.Monoid Prelude Data.Monoid> :i (->) data (->) a b -- Defined in `GHC.Prim' instance Monad ((->) r) -- Defined in `GHC.Base' instance Functor ((->) r) -- Defined in `GHC.Base' Prelude Data.Monoid> }}} The instance `Monoid b => Monoid (a -> b)` is not printed. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8535> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #6068: Panic in GHCi when using functional dependencies and promoted kinds
by GHC 18 Nov '13

18 Nov '13

#6068: Panic in GHCi when using functional dependencies and promoted kinds -------------------------------------+------------------------------------ Reporter: goldfire | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: GHCi | Version: 7.5 Resolution: fixed | Keywords: PolyKinds Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: GHCi crash | Difficulty: Unknown Test Case: polykinds/T6068 | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Changes (by simonpj): * status: new => closed * resolution: => fixed Comment: The bug showed up because you ran the testsuite with a compiler built with `-DDEBUG`. This is a good thing to do. Although there was a real bug, I couldn't come up with a way to tickle it without the `-DDEBUG` to flush it out, so I'm just closing. Thanks for alerting me to htis. Simon -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/6068#comment:10> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #6056: INLINABLE pragma prevents worker-wrapper to happen.
by GHC 18 Nov '13

18 Nov '13

#6056: INLINABLE pragma prevents worker-wrapper to happen. --------------------------------------------+------------------------------ Reporter: milan | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.4.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime performance bug | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: --------------------------------------------+------------------------------ Changes (by liyang): * cc: hackage.haskell.org@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/6056#comment:3> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #5928: INLINABLE fails to specialize in presence of simple wrapper
by GHC 18 Nov '13

18 Nov '13

#5928: INLINABLE fails to specialize in presence of simple wrapper -------------------------------------+------------------------------------ Reporter: tibbe | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.6.2 Component: Compiler | Version: 7.4.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Changes (by akio): * cc: tkn.akio@… (added) -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5928#comment:21> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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Re: [GHC] #6056: INLINABLE pragma prevents worker-wrapper to happen.
by GHC 18 Nov '13

18 Nov '13

#6056: INLINABLE pragma prevents worker-wrapper to happen. --------------------------------------------+------------------------------ Reporter: milan | Owner: simonpj Type: bug | Status: new Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.4.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime performance bug | Unknown/Multiple Test Case: | Difficulty: Unknown Blocking: | Blocked By: | Related Tickets: --------------------------------------------+------------------------------ Changes (by akio): * cc: tkn.akio@… (added) Comment: I was hit by this. Perhaps this behavior should at least be documented, because it is unexpected (at least to me) that adding an INLINABLE pragma generates a less efficient call. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/6056#comment:2> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler

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