[issue10241] gc fixes for module m_copy attribute

[Roundup Robot]

Roundup Robot added the comment:

New changeset 1edff836c954 by Antoine Pitrou in branch 'default':
Issue #10241: Clear extension module dict copies at interpreter shutdown.
http://hg.python.org/cpython/rev/1edff836c954

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10241>
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