I marked bpo-30652 as duplicate of this issue. Copy of the first message msg295903:

http://buildbot.python.org/all/builders/AMD64%20FreeBSD%2010.x%20Shared%203.6/builds/218/steps/test/logs/stdio

0:16:16 [405/405] test_socketserver crashed
Timeout (0:15:00)!
Thread 0x0000000802006400 (most recent call first):
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/threading.py", line 295 in wait
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/threading.py", line 551 in wait
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/test_socketserver.py", line 369 in wait_done
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/test_socketserver.py", line 341 in __init__
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/test_socketserver.py", line 362 in __init__
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/test_socketserver.py", line 312 in test_threading_not_handled
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/unittest/case.py", line 601 in run
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/unittest/case.py", line 649 in __call__
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/unittest/suite.py", line 122 in run
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/unittest/suite.py", line 84 in __call__
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/unittest/suite.py", line 122 in run
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/unittest/suite.py", line 84 in __call__
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/unittest/suite.py", line 122 in run
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/unittest/suite.py", line 84 in __call__
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/unittest/runner.py", line 176 in run
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/support/__init__.py", line 1889 in _run_suite
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/support/__init__.py", line 1923 in run_unittest
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/libregrtest/runtest.py", line 164 in test_runner
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/libregrtest/runtest.py", line 165 in runtest_inner
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/libregrtest/runtest.py", line 119 in runtest
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/libregrtest/runtest_mp.py", line 71 in run_tests_slave
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/libregrtest/main.py", line 475 in _main
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/libregrtest/main.py", line 468 in main
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/libregrtest/main.py", line 532 in main
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/regrtest.py", line 46 in _main
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/test/regrtest.py", line 50 in <module>
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/runpy.py", line 85 in _run_code
  File "/usr/home/buildbot/python/3.6.koobs-freebsd10/build/Lib/runpy.py", line 193 in _run_module_as_main