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gh-149879: Fix multiprocessing resource tracker tests on Cygwin - #150440
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vstinner merged 1 commit intoMay 26, 2026
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Skip test_resource_tracker_sigterm() if signal.pthread_sigmask() is missing.
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The test fails also on Linux if signal.pthread_sigmask() is missing. Apply the patch: diff --git a/Lib/multiprocessing/resource_tracker.py b/Lib/multiprocessing/resource_tracker.py
index d3328a8c617..a2cfcb550a8 100644
--- a/Lib/multiprocessing/resource_tracker.py
+++ b/Lib/multiprocessing/resource_tracker.py
@@ -31,7 +31,7 @@
__all__ = ['ensure_running', 'register', 'unregister']
-_HAVE_SIGMASK = hasattr(signal, 'pthread_sigmask')
+_HAVE_SIGMASK = False
_IGNORED_SIGNALS = (signal.SIGINT, signal.SIGTERM)
def cleanup_noop(name):Run the test: $ ./python -m test test_multiprocessing_spawn.test_misc -m test_resource_tracker_sigterm -v
...
Traceback (most recent call last):
File "/home/vstinner/python/main/Lib/multiprocessing/resource_tracker.py", line 453, in main
cache[rtype].remove(name)
~~~~~~~~~~~~~~~~~~~^^^^^^
KeyError: '/mp-1zhvb0mv'
======================================================================
FAIL: test_resource_tracker_sigterm (test.test_multiprocessing_spawn.test_misc.TestResourceTracker.test_resource_tracker_sigterm)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/home/vstinner/python/main/Lib/test/_test_multiprocessing.py", line 6315, in test_resource_tracker_sigterm
self.check_resource_tracker_death(signal.SIGTERM, False)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
File "/home/vstinner/python/main/Lib/test/_test_multiprocessing.py", line 6307, in check_resource_tracker_death
self.assertEqual(len(all_warn), 0)
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
AssertionError: 1 != 0
...
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Skip test_resource_tracker_sigterm() if signal.pthread_sigmask() is missing.