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tsan tests randomly failing


Hi,

a couple of tsan tests:

    c-c++-common/tsan/simple_race.c
    g++.dg/tsan/default_options.C

relatively often fail for me at various optimization levels (eg, in my last run the former at -O2: no WARNING: ThreadSanitizer... thus the test failed).

Is this a known issue? The machine I'm talking about is otherwise very stable (i980x, glibc2.18, nothing special)

Thanks,
Paolo.


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