Message 154636 - Python tracker

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In-reply-to
Author	Yury.Selivanov
Recipients	Yury.Selivanov, pitrou, rhettinger
Date	2012年02月29日.14:55:22
SpamBayes Score	0.0024668537
Marked as misclassified	No
Message-id	<1330527323.97.0.52214771843.issue14159@psf.upfronthosting.co.za>

Content
WeakSet has a bug in its '__len__' method, where it performs iteration though 'self.data' without ensuring _IterationGuard. This leads to some hard to catch errors with the following traceback: builtins.RuntimeError: Set changed size during iteration File /usr/lib64/python3.2/_weakrefset.py, line 66, in __len__ return sum(x() is not None for x in self.data) File /usr/lib64/python3.2/_weakrefset.py, line 66, in <genexpr> return sum(x() is not None for x in self.data)

Content

WeakSet has a bug in its '__len__' method, where it performs iteration though 'self.data' without ensuring _IterationGuard.
This leads to some hard to catch errors with the following traceback:
 builtins.RuntimeError: Set changed size during iteration
 File /usr/lib64/python3.2/_weakrefset.py, line 66, in __len__
 return sum(x() is not None for x in self.data)
 File /usr/lib64/python3.2/_weakrefset.py, line 66, in <genexpr>
 return sum(x() is not None for x in self.data)

History
Date	User	Action	Args
2012年02月29日 14:55:24	Yury.Selivanov	set	recipients: + Yury.Selivanov, rhettinger, pitrou
2012年02月29日 14:55:23	Yury.Selivanov	set	messageid: <1330527323.97.0.52214771843.issue14159@psf.upfronthosting.co.za>
2012年02月29日 14:55:23	Yury.Selivanov	link	issue14159 messages
2012年02月29日 14:55:23	Yury.Selivanov	create

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