New submission from STINNER Victor <victor.stin...@haypocalc.com>: test_multiprocessing segfaults in a loop. The crash occurs in _Condition.release() on waiter.release(), called from Queue._finalize_close(). Possible related changes:
- a5c8b6ebe895: new sigwait() test using thread (issue #8407) - 6d6099f7fe89: add sentinels to multiprocessing (issue #9205) Example of a crash: [333/356/1] test_multiprocessing Fatal Python error: Segmentation fault Thread 0x01cde800: File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/threading.py", line 237 in wait File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/multiprocessing/queues.py", line 252 in _feed File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/threading.py", line 690 in run File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/threading.py", line 737 in _bootstrap_inner File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/threading.py", line 710 in _bootstrap Current thread 0xa000d000: File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/threading.py", line 298 in notify File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/multiprocessing/queues.py", line 227 in _finalize_close File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/multiprocessing/util.py", line 202 in __call__ File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/multiprocessing/process.py", line 270 in _bootstrap File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/multiprocessing/forking.py", line 133 in __init__ File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/multiprocessing/process.py", line 134 in start File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/multiprocessing/pool.py", line 220 in _repopulate_pool File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/multiprocessing/pool.py", line 157 in __init__ File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/multiprocessing/__init__.py", line 231 in Pool File "/Users/db3l/buildarea/3.x.bolen-tiger/build/Lib/test/test_multiprocessing.py", line 2186 in test_main File "./Lib/test/regrtest.py", line 1043 in runtest_inner File "./Lib/test/regrtest.py", line 841 in runtest File "./Lib/test/regrtest.py", line 668 in main File "./Lib/test/regrtest.py", line 1618 in <module> There are approximatively 698 crashes in last tests on "x86 Tiger 3.x"! http://www.python.org/dev/buildbot/all/builders/x86%20Tiger%203.x/builds/2722/steps/test/logs/stdio Most occured on Queue._finalize_close() -> _Condition.release() -> waiter.release(). ---------- messages: 138060 nosy: haypo, pitrou priority: normal severity: normal status: open title: Segfault in test_multiprocessing _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue12310> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
