[issue17927] Argument copied into cell still referenced by frame

[Roundup Robot]

Roundup Robot added the comment:

New changeset 2b4b289c1abb by Benjamin Peterson in branch '3.3':
when arguments are cells clear the locals slot (backport of #17927)
http://hg.python.org/cpython/rev/2b4b289c1abb

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17927>
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