Seen on http://buildbot.python.org/all/builders/AMD64%20Lion%203.x/builds/428/steps/test/logs/stdio

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FAIL: test_dump_tracebacks_later_file (test.test_faulthandler.FaultHandlerTests)
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Traceback (most recent call last):
  File "/Users/ambv/Buildbot/3.x.langa-lion/build/Lib/test/test_faulthandler.py", line 490, in test_dump_tracebacks_later_file
    self.check_dump_tracebacks_later(file=True)
  File "/Users/ambv/Buildbot/3.x.langa-lion/build/Lib/test/test_faulthandler.py", line 476, in check_dump_tracebacks_later
    filename, loops)
  File "/Users/ambv/Buildbot/3.x.langa-lion/build/Lib/test/test_faulthandler.py", line 460, in _check_dump_tracebacks_later
    self.assertRegex(trace, regex)
AssertionError: Regex didn't match: '^Timeout \\(0:00:00.500000\\)!\\nThread 0x[0-9a-f]+:\\n  File "<string>", line 9 in func\n  File "<string>", line 20 in <module>$' not found in 'Timeout (0:00:00.500000)!\nThread 0x00007fff77d85960:\n  File "<string>", line 10 in func\n  File "<string>", line 20 in <module>'

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Ran 30 tests in 126.504s

The regex expects the failure to be at "line 9 in func", but the failure happens at "line 10".