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ghc: panic! (the 'impossible' happened)

    • Closed Issue created by Sacha Sokoloski @trac-alex404

    I'm not sure *why* this is happening, but I know where. The code for this library is available here: http://hub.darcs.net/alex404/hsl-random

    So as is, I can run the script called multivariate and get the expected results, but when I try to compile I get

    ghc: panic! (the 'impossible' happened)

    (GHC version 7.8.2 for x86_64-unknown-linux):

    attempt to prod-split usage call demand C(C1(U(U,U,U,U,U,U)))

    If at line 317 in Scientific.Random.Distributions.hs, I replace the statement sgma = ... with sgma = undefined, the code will compile, though obviously it cannot be used. If I transform the code in other ways which are meant to preserve the results, I can get it to compile, but then the script hangs.

    Trac metadata
    Trac field Value
    Version 7.8.2
    Type Bug
    TypeOfFailure OtherFailure
    Priority normal
    Resolution Unresolved
    Component Compiler
    Test case
    Differential revisions
    BlockedBy
    Related
    Blocking
    CC
    Operating system
    Architecture
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