[issue5647] MutableSet.__iand__ implementation calls self.discard while iterating on self

[Raymond Hettinger]

Raymond Hettinger <rhettinger at users.sourceforge.net> added the comment:

Thanks for the report.  Fixed in r70969, r70970, r70973, and r70974.

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resolution:  -> fixed
status: open -> closed

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<http://bugs.python.org/issue5647>
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