Is this a concurrency bug in base?
daniel.is.fischer at googlemail.com
Sun Oct 9 14:45:48 CEST 2011
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
Still produces 1s here with a grep.
> 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
i.e. it switches threads during print.
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