[issue25135] Deques to adopt the standard clearing procedure for mutable objects

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Here is a patch that copies only used part of the block.

I don't see an actual bug in patch 2 besides that it fallbacks to current popping behavior.

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Added file: http://bugs.python.org/file40572/deque_nonreentrant_clear4.diff

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<http://bugs.python.org/issue25135>
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