Compile crashed with panic! (the 'impossible' happened)
The following code results in a compiler crash with error
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for x86_64-unknown-linux):
nameModule show{tv a9N}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
The code can be found at http://pastie.org/8692515