[issue17644] str.format() crashes

[Roundup Robot]

Roundup Robot added the comment:

New changeset 6786e681ed58 by Benjamin Peterson in branch '3.3':
only recursively expand in the format spec (closes #17644)
http://hg.python.org/cpython/rev/6786e681ed58

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nosy: +python-dev
resolution:  -> fixed
stage: patch review -> committed/rejected
status: open -> closed

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<http://bugs.python.org/issue17644>
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