The failure occurs also on Leopard:
----------------------
[159/354] test_threadsignals
Thread 0x00007fff7080f700:
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/test/test_threadsignals.py", line 53 in test_signals
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/unittest/case.py", line 387 in _executeTestPart
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/unittest/case.py", line 442 in run
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/unittest/case.py", line 494 in __call__
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/unittest/suite.py", line 105 in run
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/unittest/suite.py", line 67 in __call__
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/unittest/suite.py", line 105 in run
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/unittest/suite.py", line 67 in __call__
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/test/support.py", line 1078 in run
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/test/support.py", line 1166 in _run_suite
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/test/support.py", line 1192 in run_unittest
File "/Users/pythonbuildbot/buildarea/3.x.hansen-osx-x86-2/build/Lib/test/test_threadsignals.py", line 218 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>
make: *** [buildbottest] Error 1
program finished with exit code 2
elapsedTime=3089.949146
----------------------
http://www.python.org/dev/buildbot/all/builders/AMD64%20Leopard%203.x/builds/1132/steps/test/logs/stdio
Even with d14eac872a46, this trace doesn't give more information :-/ Should I flush manually sys.stderr?