[issue28427] WeakValueDictionary next bug (with multithreading)

[Roundup Robot]

Roundup Robot added the comment:

New changeset 9acdcafd1418 by Antoine Pitrou in branch '2.7':
Issue #28427: old keys should not remove new values from
https://hg.python.org/cpython/rev/9acdcafd1418

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28427>
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