I've tried your code with ghc-6.6.1 under x86 linux with binary-0.3: http://hackage.haskell.org/cgi-bin/hackage-scripts/package/binary-0.3 It does terminate for me with and without profiling and/or optimization, when I pass in the source file itself as input: $ ./foo < foo.hs Is this a confirmation of your observation or am I (are we) doing something wrong? Cheers Christian Grzegorz schrieb:
Hi, I just spent some time trying to find a stack overflow bug. I seem to have narrowed it down to somewhere probably related to the default Binary instances.
It only seems to overflow when compiling with -prof. The following is a reasonably minimal example.
Any ideas of what might be going on?
-- foo.hs -- compiled with: -- ghc -O2 -prof --make foo.hs
-- $ ./foo < okok -- Stack space overflow: current size 8388608 bytes. -- Use `+RTS -Ksize' to increase it.
import Data.IntMap import qualified Data.ByteString.Lazy as BS import Data.Binary
main = do s <- BS.getContents print . size . snd $ (decode $ s::(IntMap Double,IntMap (Int,Maybe String)))
-- Grzegorz