[Haskell-beginners] Brainfuck interpreter stack overflow

Hi Stephen, It parses the source fine, but with complicated programs with lots of loops -like calculating fibonacci- it fails after a while with a stack overflow. However it does produce correct output until that point. I am running it under ghci now, maybe I should try to compile it. I didn't know, I used an old version of parsec. I am using this one: http://hackage.haskell.org/packages/archive/parsec/3.0.0/doc/html/Text-Parse... Is that version ok? Thanks for your help, Edgar