Message 205167 - Python tracker

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Author	vstinner
Recipients	pitrou, vstinner
Date	2013-12-03.22:46:40
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<[email protected]>
In-reply-to

Content
Test attached unittest_leak.py script: you will see MyException.ninstance counter increased up to 10, whereas I expect that MyException is destroyed at TestCase.run() exit. It looks like a tricky reference cycle between: - frames - exc_info local variable of _Outcome.testPartExecutor() context manager - _Outcome.errors list - _Outclass instance Attached unittest_workaround.patch patch works around the issue.

Test attached unittest_leak.py script: you will see MyException.ninstance counter increased up to 10, whereas I expect that MyException is destroyed at TestCase.run() exit.

It looks like a tricky reference cycle between:

- frames
- exc_info local variable of _Outcome.testPartExecutor() context manager
- _Outcome.errors list
- _Outclass instance

Attached unittest_workaround.patch patch works around the issue.

History
Date	User	Action	Args
2013-12-03 22:46:41	vstinner	set	recipients: + vstinner, pitrou
2013-12-03 22:46:40	vstinner	set	messageid: <[email protected]>
2013-12-03 22:46:40	vstinner	link	issue19880 messages
2013-12-03 22:46:40	vstinner	create