[BUG] openSUSE Leap 15.3 test_threading fails intermittently

[jayvdb]

While updating the openSUSE package from 2.5.0 to 2.6.2, I encountered the following on the openSUSE Leap 15.3 builds which use Python 3.6. The next build passed.

[  189s] platform linux -- Python 3.6.12, pytest-6.1.2, py-1.9.0, pluggy-0.13.1 -- /usr/bin/python3
[  189s] cachedir: .pytest_cache
[  189s] rootdir: /home/abuild/rpmbuild/BUILD/pybind11-2.6.2, configfile: setup.cfg
[  192s] collecting ... collected 422 items / 2 deselected / 1 skipped / 419 selected
....
[  200s] tests/test_iostream.py::test_redirect_both PASSED                        [ 44%]
[  200s] tests/test_iostream.py::test_threading Fatal Python error: Aborted
[  200s] 
[  200s] Current thread 0x00007f898f3bd740 (most recent call first):
[  200s]   File "/home/abuild/rpmbuild/BUILD/pybind11-2.6.2/tests/test_iostream.py", line 241 in test_threading
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/python.py", line 184 in pytest_pyfunc_call
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/callers.py", line 187 in _multicall
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/manager.py", line 87 in <lambda>
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/manager.py", line 93 in _hookexec
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/hooks.py", line 286 in __call__
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/python.py", line 1627 in runtest
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/runner.py", line 163 in pytest_runtest_call
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/callers.py", line 187 in _multicall
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/manager.py", line 87 in <lambda>
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/manager.py", line 93 in _hookexec
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/hooks.py", line 286 in __call__
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/runner.py", line 256 in <lambda>
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/runner.py", line 310 in from_call
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/runner.py", line 256 in call_runtest_hook
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/runner.py", line 216 in call_and_report
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/runner.py", line 127 in runtestprotocol
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/runner.py", line 110 in pytest_runtest_protocol
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/callers.py", line 187 in _multicall
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/manager.py", line 87 in <lambda>
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/manager.py", line 93 in _hookexec
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/hooks.py", line 286 in __call__
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/main.py", line 338 in pytest_runtestloop
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/callers.py", line 187 in _multicall
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/manager.py", line 87 in <lambda>
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/manager.py", line 93 in _hookexec
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/hooks.py", line 286 in __call__
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/main.py", line 313 in _main
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/main.py", line 257 in wrap_session
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/main.py", line 306 in pytest_cmdline_main
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/callers.py", line 187 in _multicall
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/manager.py", line 87 in <lambda>
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/manager.py", line 93 in _hookexec
[  200s]   File "/usr/lib/python3.6/site-packages/pluggy/hooks.py", line 286 in __call__
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/config/__init__.py", line 165 in main
[  200s]   File "/usr/lib/python3.6/site-packages/_pytest/config/__init__.py", line 187 in console_main
[  200s]   File "/usr/bin/pytest-3.6", line 11 in <module>
[  200s] /var/tmp/rpm-tmp.wIWbxD: line 41:  2621 Aborted                 PYTHONPATH=${PYTHONPATH:+$PYTHONPATH:}/home/abuild/rpmbuild/BUILDROOT/python-pybind11-2.6.2-lp153.35.1.x86_64/usr/lib/python3.6/site-packages PYTHONDONTWRITEBYTECODE=1 pytest-3.6 --ignore=_build. --ignore=_build.python3 -v -k 'not (tests_build_wheel or tests_build_global_wheel)'

[YannickJadoul]

Could be related to #2754?