ghc: panic! (the 'impossible' happened)
Prelude> data Shape = Circle Float Float Float | Rectangle Float Float Float Float deriving (show)
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for x86_64-unknown-linux):
nameModule show{tv a9J}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
My Apologies if this is a duplicate, first time I have used trac, or this system- reproduced fault twice from fresh start of GHCi it twice on my Ubuntu 12.04 LTS system, using Haskell platform from Ubuntu repository