[issue40696] Exception handling with "await" can hang in Python3.9.0b1

Chris Jerdonek added the comment: Okay, I'll close the issue and update it to reflect that it was restricted to the narrower, originally reported issue. -- resolution: -> fixed stage: patch review -> resolved status: open -> closed title: exception chain cycles cause hangs (was "Exc

[issue40696] Exception handling with "await" can hang in Python3.9.0b1

Chris Jerdonek added the comment: New changeset 7f77ac463cff219e0c8afef2611cad5080cc9df1 by Miss Islington (bot) in branch '3.9': bpo-40696: Fix a hang that can arise after gen.throw() (GH-20287) https://github.com/python/cpython/commit/7f77ac463cff219e0c8afef2611cad5080cc9df1 -- _

[issue40696] Exception handling with "await" can hang in Python3.9.0b1

Change by miss-islington : -- pull_requests: +19591 pull_request: https://github.com/python/cpython/pull/20322 ___ Python tracker ___ __

[issue40696] Exception handling with "await" can hang in Python3.9.0b1

Mariusz Felisiak added the comment: Chris, many thanks for detailed explanation, extensive investigation, and a fix! We'll also review Django's code in the next few days. -- ___ Python tracker _

[issue40696] Exception handling with "await" can hang in Python3.9.0b1

Chris Jerdonek added the comment: New changeset 7c30d12bd5359b0f66c4fbc98aa055398bcc8a7e by Chris Jerdonek in branch 'master': bpo-40696: Fix a hang that can arise after gen.throw() (GH-20287) https://github.com/python/cpython/commit/7c30d12bd5359b0f66c4fbc98aa055398bcc8a7e --

[issue40696] Exception handling with "await" can hang in Python3.9.0b1

Change by miss-islington : -- nosy: +miss-islington nosy_count: 8.0 -> 9.0 pull_requests: +19590 pull_request: https://github.com/python/cpython/pull/20321 ___ Python tracker _

[issue40696] Exception handling with "await" can hang in Python3.9.0b1

Chris Jerdonek added the comment: Mariusz, someone may also want to review Django's code there. Raising an exception that would otherwise create a cycle in the chain could be obscuring another issue, or there could be more straightforward alternatives. (The Python issue will still be fixed o

[issue40696] Exception handling with "await" can hang in Python3.9.0b1

Change by Chris Jerdonek : -- components: +Interpreter Core -asyncio title: "await" hangs in Python3.9.0b1. -> Exception handling with "await" can hang in Python3.9.0b1 type: -> behavior versions: +Python 3.10 ___ Python tracker