[issue45390] asyncio.Task doesn't propagate CancelledError() exception correctly.

[Ben]

Ben <benjsimner at gmail.com> added the comment:

This seems to be present in both the Python implementation as well as the accelerated C _asyncio module.

It looks like that when a Task awaits a cancelled future,
the task itself is cancelled but the cancellation message is not propagated to the task.
https://github.com/python/cpython/blob/main/Lib/asyncio/tasks.py#L242

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nosy: +bjs

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