#1887: internal error while running parallel program
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Reporter: mrd | Owner: simonmar
Type: bug | Status: new
Priority: normal | Milestone: 6.8.3
Component: Runtime System | Version: 6.9
Severity: normal | Resolution:
Keywords: sanity error threads | Difficulty: Unknown
Testcase: | Architecture: x86_64 (amd64)
Os: Linux |
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Comment (by simonmar):
Tried to repro this without success so far. I couldn't build ndp with
6.8.1 due to this:
{{{
ccTyCon: base:GHC.Base.Bool{(w) tc 3c}
ccTyCon: base:GHC.Base.Bool{(w) tc 3c}
ccTyCon: base:GHC.Base.Bool{(w) tc 3c}
ccTyCon: base:GHC.Base.Bool{(w) tc 3c}
ccTyCon: base:GHC.Base.Bool{(w) tc 3c}
ghc-6.8.1: panic! (the 'impossible' happened)
(GHC version 6.8.1 for x86_64-unknown-linux):
vectorise/Vectorise.hs:(303,0)-(327,78): Non-exhaustive patterns
in function vectAlgCase
}}}
which I presume is not a bug. With the HEAD I build ndp and ran the test
program on 2 processors many times (20+) successfully. Tried also with
-N4, also this machine only has two cores.
I'll try next on an 8-proc Windows box, but if you have any more hints as
to how to reproduce this I'd be grateful.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1887#comment:3>
GHC <http://www.haskell.org/ghc/>
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