Oh, one change of the commit b9b69003d91c6ea94b890ce24ed25686d30f1428 introduced a regression x86 Gentoo Refleaks 3.x. It seems like 5 seconds is not enough on this slow buildbot.

http://buildbot.python.org/all/builders/x86%20Gentoo%20Refleaks%203.x/builds/93/steps/test/logs/stdio

2:28:30 load avg: 6.98 [263/405/1] test_multiprocessing_spawn failed -- running: test_zipfile (797 sec)
beginning 6 repetitions
123456
.Process Process-555:1:1:
Traceback (most recent call last):
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/multiprocessing/process.py", line 297, in _bootstrap
    self.run()
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/multiprocessing/process.py", line 99, in run
    self._target(*self._args, **self._kwargs)
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/_test_multiprocessing.py", line 4050, in child
    join_process(p, timeout=5)
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/_test_multiprocessing.py", line 79, in join_process
    support.join_thread(process, timeout)
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/support/__init__.py", line 2117, in join_thread
    raise AssertionError(msg)
AssertionError: failed to join the thread in 5.0 seconds