http://buildbot.python.org/all/#/builders/1/builds/232

(...)
3:28:16 load avg: 3.67 [401/416/3] test__xxsubinterpreters crashed (Exit code -6) -- running: test_asyncio (4631 sec)
python: Modules/gcmodule.c:277: visit_decref: Assertion `_PyGCHead_REFS(gc) != 0' failed.
Fatal Python error: Aborted

Current thread 0xb748a700 (most recent call first):
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/case.py", line 615 in run
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/case.py", line 663 in __call__
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/support/__init__.py", line 1781 in run
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/support/__init__.py", line 1882 in _run_suite
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/support/__init__.py", line 1972 in run_unittest
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/runtest.py", line 175 in test_runner
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/runtest.py", line 176 in runtest_inner
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/runtest.py", line 140 in runtest
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/runtest_mp.py", line 67 in run_tests_slave
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/main.py", line 517 in _main
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/main.py", line 510 in main
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/main.py", line 585 in main
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/regrtest.py", line 46 in _main
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/regrtest.py", line 50 in <module>
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/runpy.py", line 85 in _run_code
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/runpy.py", line 193 in _run_module_as_main
(...)
Re-running test 'test__xxsubinterpreters' in verbose mode
(...)
test_recv_not_found (test.test__xxsubinterpreters.ChannelTests) ... ok
test_run_string_arg_resolved (test.test__xxsubinterpreters.ChannelTests) ... python: Modules/gcmodule.c:277: visit_decref: Assertion `_PyGCHead_REFS(gc) != 0' failed.
Fatal Python error: Aborted
Current thread 0xb74b9700 (most recent call first):
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/case.py", line 615 in run
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/case.py", line 663 in __call__
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/unittest/runner.py", line 176 in run
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/support/__init__.py", line 1882 in _run_suite
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/support/__init__.py", line 1972 in run_unittest
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/runtest.py", line 175 in test_runner
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/runtest.py", line 176 in runtest_inner
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/runtest.py", line 140 in runtest
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/main.py", line 291 in rerun_failed_tests
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/main.py", line 540 in _main
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/main.py", line 510 in main
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/libregrtest/main.py", line 585 in main
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/test/__main__.py", line 2 in <module>
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/runpy.py", line 85 in _run_code
  File "/buildbot/buildarea/3.x.ware-gentoo-x86.refleak/build/Lib/runpy.py", line 193 in _run_module_as_main