`test_multiprocessing_spawn.test_misc` is flaky on `AMD64 Fedora Rawhide NoGIL refleaks 3.x` buildbot

[mpage]

Bug report

Bug description:

test_multiprocessing_spawn.test_misc is failing intermittently with "environment modified" errors (e.g. 1, 2, 3) on the AMD64 Fedora Rawhide NoGIL refleaks 3.x buildbot:

Warning -- files was modified by test.test_multiprocessing_spawn.test_misc
Warning --   Before: []
Warning --   After:  ['.3431222']
Re-running test.test_multiprocessing_spawn.test_misc in verbose mode
Warning -- files was modified by test.test_multiprocessing_spawn.test_misc
Warning --   Before: []
Warning --   After:  ['.3508960', '.3510837']

I haven't been able to reproduce this locally by running ./python -m test -R 3:3 test.test_multiprocessing_spawn.test_misc. Build 133 is the first recent instance (~18 days ago) I can find of the same kind of failure, though it happens in a different test (test_multiprocessing_spawn.test_manager). It looks like the failures became for frequent around 14 days ago (9/16).

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

[vstinner]

I close the issue. Sadly, there is not enough information to debug it, and it wasn't seen recently.

---

I cannot reproduce the issue locally on Linux on an idle system:

./python -m test test_multiprocessing_spawn.test_misc --fail-env-changed -v

test_multiprocessing_spawn.test_misc is failing intermittently with "environment modified" errors (e.g. 1, 2, 3) on the AMD64 Fedora Rawhide NoGIL refleaks 3.x buildbot

I cannot find this error in recent failures.