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Re: non-deterministic test failure

From: Mike Gran
Subject: Re: non-deterministic test failure
Date: Sun, 17 Jan 2010 13:49:29 -0800 (PST)

> From: Neil Jerram <address@hidden>

> "Jose A. Ortega Ruiz" writes:
> > hi,
> >
> > during the last month or so, the threads test in 1.9.x has been failing
> > for me (debian unstable, x86 box) intermittently, with the message:
> >
> > FAIL: threads.test: lock-mutex: timed locking succeeds if mutex unlocked
> > within timeout
> >
> > it happens every now and then, but i haven't been able to pin down the
> > cause (i'm not familiar with the code and haven't looked at it much), or
> > to reproduce the error consistently (although with the current it seems
> > to happen almost always). am i the only one?
> No, I think I've seen this too.  Intermittently though, as you say.

I get the same fairly often when I compile CFLAGS="-g3 -gdwarf-2 -O0".
I imagine that it is the "-O0" zero optimization that has something to 
do with it.


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