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Issue #28427: old keys should not remove new values from

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WeakValueDictionary when collecting from another thread.
This commit is contained in:
Antoine Pitrou 2016-12-27 14:23:43 +01:00
commit d741ed492f
7 changed files with 195 additions and 24 deletions
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12
Lib/test/test_weakref.py
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@ -1676,6 +1676,18 @@ class MappingTestCase(TestBase):
x = d.pop(10, 10)
self.assertIsNot(x, None) # we never put None in there!
def test_threaded_weak_valued_consistency(self):
# Issue #28427: old keys should not remove new values from
# WeakValueDictionary when collecting from another thread.
d = weakref.WeakValueDictionary()
with collect_in_thread():
for i in range(200000):
o = RefCycle()
d[10] = o
# o is still alive, so the dict can't be empty
self.assertEqual(len(d), 1)
o = None # lose ref
from test import mapping_tests