[Haskell-cafe] compiler versus interpreter

[jepalomar23 at ono.com]

I am programming an application with a lot of interactivity. When using
x<-getChar the character corresponding to the pushed key is assigned to
x immediately. Launching the module through runghc works properly.
However, the compiled module through ghc requires to push return after
the character key in order to complete the assignation procedure.
It is a bug or there is some difference between compiler an interpreter?
Thanks in advance.
jepalomar