[issue20566] asyncio as_completed() thrashes adding and removing callbacks

[Glenn Langford]

Glenn Langford added the comment:

> Glenn, what led you to discover this?

It was found by code inspection. I recently started looking at concurrent.futures, really just curious as to how futures were implemented. Because one of the concurrent.futures bugs I raised also applied to asyncio, I started poking into the source for it as well.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20566>
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