9 Oct
2011
9 Oct
'11
8:45 a.m.
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.
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.