[docs] [issue15718] Possible OverflowError in __len__ method undocumented (when called via len() function)

[Serhiy Storchaka]

Serhiy Storchaka added the comment:


New changeset f2ed2858eea7569c8915b3611ca5ec92ae10b17f by Serhiy Storchaka in branch '3.6':
[3.6] bpo-15718: Document the upper bound constrain on the __len__ return value. (GH-1256) (#1259)
https://github.com/python/cpython/commit/f2ed2858eea7569c8915b3611ca5ec92ae10b17f


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<http://bugs.python.org/issue15718>
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