Hi Daniel, On 09.10.2011, at 14:45, Daniel Fischer wrote:
> On Sunday 09 October 2011, 13:52:47, Jean-Marie Gaillourdet wrote: >> This seems to be a Heisenbug as it is extremely fragile, when adding a >> "| grep 1" to the while loop it seems to disappears. At least on my >> computers. > > Still produces 1s here with a grep. Well, it may have been bad luck on my site. > >> >> All this was done on several Macs running the latest OS X Lion with ghc >> 7.0.3 from the binary distribution on the GHC download page. > > linux x86_64, ghc-7.0.4, 7.0.2 and 6.12.3. > Indeed 6.12.3 goes so far to sometimes produce > 0 > 0 > --- > 10 > > --- > 0 > 0 > --- > 01 > > --- > > i.e. it switches threads during print. Thanks, for reproducing it. I failed to see it on Linux so far. So I guess a bug report is in order? Or are bug reports to old versions not welcome? Jean _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
