[issue21321] itertools.islice() doesn't release reference to the source iterator when the slice is exhausted

[Roundup Robot]

Roundup Robot added the comment:

New changeset b795105db23a by Antoine Pitrou in branch '3.4':
Issue #21321: itertools.islice() now releases the reference to the source iterator when the slice is exhausted.
http://hg.python.org/cpython/rev/b795105db23a

New changeset a627b3e3c9c8 by Antoine Pitrou in branch 'default':
Issue #21321: itertools.islice() now releases the reference to the source iterator when the slice is exhausted.
http://hg.python.org/cpython/rev/a627b3e3c9c8

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nosy: +python-dev

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<http://bugs.python.org/issue21321>
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