#3960: ghc panic when attempting to compile DPH code
---------------------------+------------------------------------------------
Reporter: jwlato | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.12.1
Keywords: panic, DPH | Difficulty:
Os: MacOS X | Testcase:
Architecture: x86 | Failure: Compile-time crash
---------------------------+------------------------------------------------
Changes (by simonpj):
* cc: rl (added)
Old description:
> the function "tmpfn" in the attached code causes ghc to panic (the
> 'impossible' happened). This bug is present in ghc 6.12.1 and
> 6.13.20100226
>
> ghc: panic! (the 'impossible' happened)
> (GHC version 6.12.1 for i386-apple-darwin):
> VectMonad.lookupFamInst: not found:
> dph-seq:Data.Array.Parallel.Lifted.PArray.PData{tc rq5}
> (dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
> ghc-prim:GHC.Types.Double{(w) tc 3u},
> dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
> ghc-prim:GHC.Types.Double{(w) tc 3u},
> dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
> (dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
> (ghc-prim:GHC.Types.Int{(w) tc 3J},
> ghc-prim:GHC.Types.Double{(w) tc 3u})),
> dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
> ghc-prim:GHC.Types.Double{(w) tc 3u},
> dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
> (dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
> (ghc-prim:GHC.Types.Int{(w) tc 3J},
> ghc-prim:GHC.Types.Double{(w) tc 3u})),
> dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
> ghc-prim:GHC.Types.Double{(w) tc 3u})
New description:
the function "tmpfn" in the attached code causes ghc to panic (the
'impossible' happened). This bug is present in ghc 6.12.1 and
6.13.20100226
{{{
ghc: panic! (the 'impossible' happened)
(GHC version 6.12.1 for i386-apple-darwin):
VectMonad.lookupFamInst: not found:
dph-seq:Data.Array.Parallel.Lifted.PArray.PData{tc rq5}
(dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
ghc-prim:GHC.Types.Double{(w) tc 3u},
dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
ghc-prim:GHC.Types.Double{(w) tc 3u},
dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
(dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
(ghc-prim:GHC.Types.Int{(w) tc 3J},
ghc-prim:GHC.Types.Double{(w) tc 3u})),
dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
ghc-prim:GHC.Types.Double{(w) tc 3u},
dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
(dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
(ghc-prim:GHC.Types.Int{(w) tc 3J},
ghc-prim:GHC.Types.Double{(w) tc 3u})),
dph-seq:Data.Array.Parallel.Lifted.PArray.PArray{tc r35}
ghc-prim:GHC.Types.Double{(w) tc 3u})
}}}
--
Comment:
Roman: could you look at this please?
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3960#comment:1>
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