Timeout of 15 minutes on "x86 XP-4 3.x":
----------------------------
...
[334/354] test_threading
Thread 0x0000024c:
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\threading.py", line 235 in wait
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\lock_tests.py", line 392 in f
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\lock_tests.py", line 37 in task

Thread 0x000002d8:
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\threading.py", line 235 in wait
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\lock_tests.py", line 392 in f
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\lock_tests.py", line 37 in task

Thread 0x00000da4:
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\threading.py", line 235 in wait
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\lock_tests.py", line 392 in f
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\lock_tests.py", line 37 in task

Thread 0x00000bb0:
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\lock_tests.py", line 16 in _wait
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\lock_tests.py", line 416 in _check_notify
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\lock_tests.py", line 433 in test_notify
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\unittest\case.py", line 387 in _executeTestPart
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\unittest\case.py", line 442 in run
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\unittest\case.py", line 494 in __call__
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\unittest\suite.py", line 105 in run
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\unittest\suite.py", line 67 in __call__
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\unittest\suite.py", line 105 in run
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\unittest\suite.py", line 67 in __call__
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\support.py", line 1078 in run
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\support.py", line 1166 in _run_suite
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\support.py", line 1192 in run_unittest
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\test_threading.py", line 728 in test_main
  File "../lib/test/regrtest.py", line 1032 in runtest_inner
  File "../lib/test/regrtest.py", line 826 in runtest
  File "../lib/test/regrtest.py", line 650 in main
  File "../lib/test/regrtest.py", line 1607 in <module>
s_push: parser stack overflow
program finished with exit code 1
elapsedTime=2601.059000
----------------------------
http://www.python.org/dev/buildbot/all/builders/x86%20XP-4%203.x/builds/4317/steps/test/logs/stdio

Hum, it looks like we have 4 threads, and all threads are waiting.

=> See issue #8799 and maybe also #4188 and #5114.