Message 301116 - Python tracker

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Author	vstinner
Recipients	vstinner
Date	2017-09-01.14:58:24
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1504277904.95.0.0934980312796.issue31323@psf.upfronthosting.co.za>
In-reply-to

Content
While testing bpo-31234 fix, I noticed that some test_ssl tests using ThreadedEchoServer create reference cycles with ConnectionHandler: ConnectionHandler fills ThreadedEchoServer.conn_errors with exceptions, but exceptions keep an alive traceback object which contains frame locals. I tried to use traceback.clear_frames(), but this function is broken: see bpo-31321. Attached PR works around the issue by storing errors are text rather than objects. The PR prevents warnings about dangling threads.

While testing bpo-31234 fix, I noticed that some test_ssl tests using ThreadedEchoServer create reference cycles with ConnectionHandler: ConnectionHandler fills ThreadedEchoServer.conn_errors with exceptions, but exceptions keep an alive traceback object which contains frame locals.

I tried to use traceback.clear_frames(), but this function is broken: see bpo-31321.

Attached PR works around the issue by storing errors are text rather than objects.

The PR prevents warnings about dangling threads.

History
Date	User	Action	Args
2017-09-01 14:58:24	vstinner	set	recipients: + vstinner
2017-09-01 14:58:24	vstinner	set	messageid: <1504277904.95.0.0934980312796.issue31323@psf.upfronthosting.co.za>
2017-09-01 14:58:24	vstinner	link	issue31323 messages
2017-09-01 14:58:24	vstinner	create