[phobos] periodic test failures + auto-testing

[Brad Roberts]

Since I started the pull tester, there's essentially always a build running.  That's not a problem.  What is a problem
is the tests that fail for reasons that have nothing to do with the changes and non-deterministically.  The most common
example, that I've seen so far, is this one:

[2011-Dec-18 18:07:48] [2011-Dec-18 18:07:53] [2011-Dec-18 18:07:52.9008638] [-4 secs, -900 ms, -863 μs, and -8 hnsecs]
[99 ms, 136 μs, and 2 hnsecs]
core.exception.AssertError at std.file(778): unittest failure

It's shown up 22 times in the last 3 days.  So far, it's been exclusive to the freebsd/64 run.  An example:
  http://d.puremagic.com/test-results/pull.ghtml?runid=2654

Has anyone seen this and looked into it at all?

Thanks,
Brad