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

[Raymond Hettinger]

Raymond Hettinger added the comment:

The ref-counts in the islice_reduce code don't look to be correct at first glance.

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assignee:  -> rhettinger

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21321>
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