[issue21340] Possible concurrency bug in asyncio, AttributeError in tasks.py

Guido van Rossum added the comment: Sorry, should have let someone review it. I'm a bit out of practice. :-) But in this case I think three-arg getattr() is better; less code, less indentation, and the final question (is the frame not None?) must still be asked. -- __

[issue21340] Possible concurrency bug in asyncio, AttributeError in tasks.py

STINNER Victor added the comment: Why not using try/except AttributeError? -- ___ Python tracker ___ ___ Python-bugs-list mailing list

[issue21340] Possible concurrency bug in asyncio, AttributeError in tasks.py

Roundup Robot added the comment: New changeset d42d3d3f9c41 by Guido van Rossum in branch '3.4': asyncio: Be careful accessing instance variables in __del__ (closes #21340). http://hg.python.org/cpython/rev/d42d3d3f9c41 New changeset 0cb436c6f082 by Guido van Rossum in branch 'default': Merge 3.

[issue21340] Possible concurrency bug in asyncio, AttributeError in tasks.py

Guido van Rossum added the comment: Oh wait, it looks like the assert failed because KeyboardInterrupt hit right at that point. I ran the program a few times and when I hit ^C I get a traceback at a different point in the code each time. This is as expected. You must have hit the rare case whe

[issue21340] Possible concurrency bug in asyncio, AttributeError in tasks.py

Guido van Rossum added the comment: Looks like there is a bug in CoroWrapper -- when the assert in __init__ fails, __del__ gets called imediately after and that triggers this traceback. However I'm not sure what causes the assert to fail -- it looks like this is coming from sleep(), which does

[issue21340] Possible concurrency bug in asyncio, AttributeError in tasks.py

Changes by Berker Peksag : -- nosy: +giampaolo.rodola, gvanrossum, haypo, pitrou, yselivanov ___ Python tracker ___ ___ Python-bugs-li

[issue21340] Possible concurrency bug in asyncio, AttributeError in tasks.py

Changes by Jack Murray : -- title: Possible bug in asyncio -> Possible concurrency bug in asyncio, AttributeError in tasks.py ___ Python tracker ___