[issue26923] asyncio.gather drops cancellation

[Guido van Rossum]

Guido van Rossum added the comment:

I think I agree with Johannes. If all children refuse to be cancelled because they are already done, the outer _GatheringFuture might as well refuse to be cancelled as well.

However I'm not sure I actually understand the mechanism whereby the calling Task ends up surviving, and Johannes' description appears garbled.

Can anyone add some print statements to various parts and explain it here?

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<http://bugs.python.org/issue26923>
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