id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
3960,ghc panic when attempting to compile DPH code,jwlato,rl,"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})
}}}",bug,new,lowest,7.6.2,Data Parallel Haskell,6.12.1,,"panic, DPH",jwlato@… rl,MacOS X,x86,Compile-time crash,,,,,