#16379: JuicyPixels build panics on s390x ghc-8.4.4 -------------------------------------+------------------------------------- Reporter: juhpetersen | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.4.4 Resolution: | Keywords: Operating System: Linux | Architecture: Other Type of failure: Compile-time | Test Case: crash or panic | Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Description changed by juhpetersen: Old description:

When I try to build JuicyPixels on Fedora s390x Linux with ghc-8.4.4 I get a compiler panic:

{{{ [ 9 of 30] Compiling Codec.Picture.ColorQuant ( src/Codec/Picture/ColorQuant.hs, dist/build/Codec/Picture/ColorQuant.o ) BUILDSTDERR: src/Codec/Picture/ColorQuant.hs:123:26: warning: [-Woverflowed-literals] BUILDSTDERR: Literal 256 is out of the GHC.Word.Word8 range 0..255 BUILDSTDERR: | BUILDSTDERR: 123 | (PixelRGB8 (r .&. (256 - dr)) (g .&. (256 - dg)) (b .&. (256 - db))) BUILDSTDERR: | ^^^ BUILDSTDERR: src/Codec/Picture/ColorQuant.hs:123:45: warning: [-Woverflowed-literals] BUILDSTDERR: Literal 256 is out of the GHC.Word.Word8 range 0..255 BUILDSTDERR: | BUILDSTDERR: 123 | (PixelRGB8 (r .&. (256 - dr)) (g .&. (256 - dg)) (b .&. (256 - db))) BUILDSTDERR: | ^^^ BUILDSTDERR: src/Codec/Picture/ColorQuant.hs:123:64: warning: [-Woverflowed-literals] BUILDSTDERR: Literal 256 is out of the GHC.Word.Word8 range 0..255 BUILDSTDERR: | BUILDSTDERR: 123 | (PixelRGB8 (r .&. (256 - dr)) (g .&. (256 - dg)) (b .&. (256 - db))) BUILDSTDERR: | ^^^ BUILDSTDERR: ghc: panic! (the 'impossible' happened) BUILDSTDERR: (GHC version 8.4.4 for s390x-ibm-linux): BUILDSTDERR: pprStatics: float BUILDSTDERR: F32 BUILDSTDERR: F32 BUILDSTDERR: I32 BUILDSTDERR: Call stack: BUILDSTDERR: CallStack (from HasCallStack): BUILDSTDERR: callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable BUILDSTDERR: pprPanic, called at compiler/cmm/PprC.hs:525:5 in ghc:PprC BUILDSTDERR: Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}}

I would test on ghc-8.6.3 too, but I haven't been able to build ghc-8.6 yet on s390x (unregisterized on unregisterized): see issue 15913.

New description: When I try to build JuicyPixels on Fedora s390x Linux, ghc-8.4.4 panics: {{{ [ 9 of 30] Compiling Codec.Picture.ColorQuant ( src/Codec/Picture/ColorQuant.hs, dist/build/Codec/Picture/ColorQuant.o ) BUILDSTDERR: src/Codec/Picture/ColorQuant.hs:123:26: warning: [-Woverflowed-literals] BUILDSTDERR: Literal 256 is out of the GHC.Word.Word8 range 0..255 BUILDSTDERR: | BUILDSTDERR: 123 | (PixelRGB8 (r .&. (256 - dr)) (g .&. (256 - dg)) (b .&. (256 - db))) BUILDSTDERR: | ^^^ BUILDSTDERR: src/Codec/Picture/ColorQuant.hs:123:45: warning: [-Woverflowed-literals] BUILDSTDERR: Literal 256 is out of the GHC.Word.Word8 range 0..255 BUILDSTDERR: | BUILDSTDERR: 123 | (PixelRGB8 (r .&. (256 - dr)) (g .&. (256 - dg)) (b .&. (256 - db))) BUILDSTDERR: | ^^^ BUILDSTDERR: src/Codec/Picture/ColorQuant.hs:123:64: warning: [-Woverflowed-literals] BUILDSTDERR: Literal 256 is out of the GHC.Word.Word8 range 0..255 BUILDSTDERR: | BUILDSTDERR: 123 | (PixelRGB8 (r .&. (256 - dr)) (g .&. (256 - dg)) (b .&. (256 - db))) BUILDSTDERR: | ^^^ BUILDSTDERR: ghc: panic! (the 'impossible' happened) BUILDSTDERR: (GHC version 8.4.4 for s390x-ibm-linux): BUILDSTDERR: pprStatics: float BUILDSTDERR: F32 BUILDSTDERR: F32 BUILDSTDERR: I32 BUILDSTDERR: Call stack: BUILDSTDERR: CallStack (from HasCallStack): BUILDSTDERR: callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable BUILDSTDERR: pprPanic, called at compiler/cmm/PprC.hs:525:5 in ghc:PprC BUILDSTDERR: Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} I would test on ghc-8.6.3 too, but I haven't been able to build ghc-8.6 yet on s390x (unregisterized on unregisterized): see issue 15913. -- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16379#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#16379: JuicyPixels build panics on s390x ghc-8.4.4 -------------------------------------+------------------------------------- Reporter: juhpetersen | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.4.4 Resolution: | Keywords: Operating System: Linux | Architecture: Other Type of failure: Compile-time | Test Case: crash or panic | Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by juhpetersen): Apparently Debian Haskell worked around this with -O0 on unregisterized builds... https://packages.debian.org/sid/libghc-juicypixels-dev {{{ haskell-juicypixels (3.2.9.5-4) unstable; urgency=medium * Compile with --ghc-options="-O0" on unregisterised 64-bit arches to work-around a GHC bug. -- Ilias Tsitsimpis Wed, 07 Nov 2018 11:36:59 +0200 }}} So assuming this was already reported this is probably duplicate bug. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16379#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#16379: JuicyPixels build panics on s390x ghc-8.4.4 -------------------------------------+------------------------------------- Reporter: juhpetersen | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.4.4 Resolution: duplicate | Keywords: Operating System: Linux | Architecture: Other Type of failure: Compile-time | Test Case: crash or panic | Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by juhpetersen): * status: new => closed * resolution: => duplicate Comment: Thanks, @monoidal -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16379#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler