#3960: ghc panic when attempting to compile DPH code
------------------------+---------------------------------------------------
Reporter: jwlato | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 6.12.1 | Keywords: panic, DPH
Os: MacOS X | Testcase:
Architecture: x86 | Failure: Compile-time crash
------------------------+---------------------------------------------------
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})
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3960>
GHC <http://www.haskell.org/ghc/>
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