This embarrassing bug in GHC 6.0 has been reported several times now. There's a good workaround: just say :t GHC.Err.error as your first command in GHCi. Then it'll be happy with your subsequent definition. Simon | -----Original Message----- | From: glasgow-haskell-bugs-admin@haskell.org [mailto:glasgow-haskell-bugs-admin@haskell.org] On | Behalf Of Hal Daume III | Sent: 11 June 2003 23:56 | To: glasgow-haskell-bugs@haskell.org | Subject: bug with definition at top-level: | | 3:54pm moussor:handalign/ ghci | ___ ___ _ | / _ \ /\ /\/ __(_) | / /_\// /_/ / / | | GHC Interactive, version 6.0, for Haskell 98. | / /_\\/ __ / /___| | http://www.haskell.org/ghc/ | \____/\/ /_/\____/|_| Type :? for help. | | Loading package base ... linking ... done. | Loading package lang ... linking ... done. | Prelude> let f s = let (p1:_:p2:_:r1:_:f2:_) = map read (words s) in show | ((2*p1*r1)/(p1+r1)) ++ " & " ++ show ((2*p2*f2)/(p2+f2)) | ghc-6.0: panic! (the `impossible' happened, GHC version 6.0): | getLinkDeps No iface for [<pkg>]GHCziErr | | Please report it as a compiler bug to glasgow-haskell-bugs@haskell.org, | or http://sourceforge.net/projects/ghc/. | | | | -- | Hal Daume III | hdaume@isi.edu | "Arrest this man, he talks in maths." | www.isi.edu/~hdaume | | _______________________________________________ | Glasgow-haskell-bugs mailing list | Glasgow-haskell-bugs@haskell.org | http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs