Bug? Re: GHC version 5.02.2 is available - SuSE RPMs

Jorge Adriano jadrian@mat.uc.pt
Sat, 12 Jan 2002 16:38:43 +0000


> > > module Main where
> > > main :: IO()
> > > main = do
> > >       putStr "n:"
> > >       n <- readLn :: IO(Int)
> > >       print n
> >
> > Used to work fine with ghc 5.00.2, that is, it would print "n:", then
> > wait for the input, and finaly print n.
> > With Ghc 5.02.2 it only prints "n:" after reading the n.
<snip>
>
> It's actually expected behaviour with the current IO implementation -
> you have to explicitly flush stdout before reading from stdin (if stdout
> is buffered, that is).
>
> FWIW, I don't think this is the Right behaviour either.

Well it seems at least quite annoying, not to mention that lots of programs 
will 'break'. When was this behaviour changed? And why?

J.A.