return (repeat 'a') >>= \ x -> print $ span (const True) x
with hugs you will get a stack error, in ghc it executes in constant space,
i.e. indefinitely. In essenece the above example does exactly the same as my
ealier code.
this thread might be relevant:
http://www.haskell.org/pipermail/hugs-bugs/2007-June/001815.html
http://www.haskell.org/pipermail/hugs-bugs/2007-June/001816.html
http://www.haskell.org/pipermail/hugs-bugs/2007-June/001817.html
claus
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