[issue16641] sched.scheduler.enter arguments should not be modifiable

[Roundup Robot]

Roundup Robot added the comment:

New changeset 1c9c0f92df65 by Serhiy Storchaka in branch '3.3':
Issue #16641: Fix default values of sched.scheduler.enter arguments were modifiable.
http://hg.python.org/cpython/rev/1c9c0f92df65

New changeset e22ebc34a8eb by Serhiy Storchaka in branch 'default':
Issue #16641: Fix default values of sched.scheduler.enter arguments were modifiable.
http://hg.python.org/cpython/rev/e22ebc34a8eb

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nosy: +python-dev

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