[issue29200] is it a bug in `functools._HashedSeq`

[Roundup Robot]

Roundup Robot added the comment:

New changeset 52d3cbcf546f by Raymond Hettinger in branch 'default':
Issue #29200: Add test for lru cache only calling __hash__ once
https://hg.python.org/cpython/rev/52d3cbcf546f

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nosy: +python-dev

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<http://bugs.python.org/issue29200>
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