New submission from STINNER Victor <vstin...@redhat.com>:
test_subprocess: test_close_fds_with_stdio() pass when run alone, but fail when run in parallel. I tagged the issue as "easy" for new contributors to Python. If someone is interested to work on this issue, please contact me in private. https://buildbot.python.org/all/#/builders/3/builds/2446 I can reproduce the issue. The test pass when run alone: > python -m test test_subprocess -m test_close_fds_with_stdio -v Running Debug|x64 interpreter... == CPython 3.7.3+ (heads/3.7:9344d74f7b, Apr 23 2019, 09:53:41) [MSC v.1915 64 bit (AMD64)] == Windows-10-10.0.17763-SP0 little-endian == cwd: C:\vstinner\python\3.7\build\test_python_6116 == CPU count: 2 == encodings: locale=cp1252, FS=utf-8 Run tests sequentially 0:00:00 [1/1] test_subprocess test_close_fds_with_stdio (test.test_subprocess.Win32ProcessTestCase) ... ok ---------------------------------------------------------------------- Ran 1 test in 0.302s OK == Tests result: SUCCESS == 1 test OK. Total duration: 391 ms Tests result: SUCCESS But the test fails when run in parallel: > python -m test test_subprocess -m test_close_fds_with_stdio -F -j4 Running Debug|x64 interpreter... Run tests in parallel using 4 child processes 0:00:01 [ 1/1] test_subprocess failed test test_subprocess failed -- Traceback (most recent call last): File "C:\vstinner\python\3.7\lib\test\test_subprocess.py", line 2930, in test_close_fds_with_stdio self.assertEqual(p.returncode, 1) AssertionError: 0 != 1 0:00:01 [ 2/1] test_subprocess passed 0:00:01 [ 3/2] test_subprocess failed test test_subprocess failed -- Traceback (most recent call last): File "C:\vstinner\python\3.7\lib\test\test_subprocess.py", line 2930, in test_close_fds_with_stdio self.assertEqual(p.returncode, 1) AssertionError: 0 != 1 0:00:01 [ 4/3] test_subprocess failed test test_subprocess failed -- Traceback (most recent call last): File "C:\vstinner\python\3.7\lib\test\test_subprocess.py", line 2942, in test_close_fds_with_stdio self.assertEqual(p.returncode, 1) AssertionError: 0 != 1 0:00:02 [ 5/3] test_subprocess passed 0:00:02 [ 6/3] test_subprocess passed == Tests result: FAILURE == 3 tests OK. 3 tests failed: test_subprocess test_subprocess test_subprocess Total duration: 2 sec 313 ms Tests result: FAILURE ---------- keywords: easy messages: 340698 nosy: vstinner priority: normal severity: normal status: open title: [Easy][Windows] test_subprocess: test_close_fds_with_stdio() has a race condition _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue36703> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
