[Haskell-cafe] Re: Nested unsafePerformIO?

Bas van Dijk writes:

It looks like your timedIterateIO is too lazy.

Try evaluating the 'y' before calling timedIterateIO' again as in:

let y = f x ... y `seq` timedIterateIO' t0 y

Thank you, that appears to do the trick. I'm still a bit puzzled about why the problem only manifested in this case - it didn't manifest when I used iterate, for example.