[Haskell-cafe] Shouldn't this loop indefinitely => take (last
dons at galois.com
Thu Apr 3 17:34:46 EDT 2008
> Hi all,
> If you compile and run this:
> main = do
> putStrLn $ show $ take (last [0..]) [0..]
> or simply run:
> take (last [0..]) [0..]
> in ghci, it first hang for about one minute and then starts to generate an
> infinite list. I was expecting "last [0..]" to never produce a value and
> the "take" function to never take from the [0..] list.
I can't reproduce this with ghc 6.8.2 on a 64 bit arch, both just sit
running in constant space, at full cpu.
Are you perhaps constraining it to an Int type somewhere (so that [0..]
terminates at maxBound)? I.e. this kind of thing:
Prelude> last [1..] :: Int8
but for maxBound on Int32?
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