[New-bugs-announce] [issue42683] asyncio should handle keyboard interrupt while the event loop is running

[Paul Moore]

New submission from Paul Moore <p.f.moore at gmail.com>:

See the comment on Discourse here: https://discuss.python.org/t/feeding-data-generated-via-asyncio-into-a-synchronous-main-loop/5436/28 (and the thread leading up to this comment).

In the thread, @njs states that if the user hits Ctrl-C while the asyncio event loop is running, it's possible for internal asyncio data structures to end up in an inconsistent state. If that's the case, then this would make asyncio-based code unreliable in real-world use.

I don't have a way to reproduce this - from the Discourse thread, I had assumed that ctrl-C was safe to use on an asyncio-based program, but was told otherwise, and I can't find anything definitive either way.

At a minimum, the asyncio documentation should confirm that it is exception-safe (specifically against Ctrl-C, but in general I'd assume that asyncio is safe in the face of uncaught exceptions in user-written async code).

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components: asyncio
messages: 383370
nosy: asvetlov, paul.moore, yselivanov
priority: normal
severity: normal
status: open
title: asyncio should handle keyboard interrupt while the event loop is running
type: behavior
versions: Python 3.10

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42683>
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