The impossible happened

ghc -O --make -debug randomplay.hs -o randomplay -lssl -lcrypto -lz

ghc-6.4.1: ghc-6.4.1: panic! (the `impossible' happened, GHC version  
6.4.1):
        unknown exception

Please report it as a compiler bug to glasgow-haskell-bugs@xxxxxxxxxxx,
or http://sourceforge.net/projects/ghc/.

I unregistered my library package, registered again and tried to make  
the program that was using it. The program consists of two modules  
and they were built and not touched, thus no rebuild.

Got the error above. Removed *.o and *.hi for the two program modules  
and the rebuild went smoothly.

--
http://wagerlabs.com/