[issue26923] asyncio.gather drops cancellation
Guido van Rossum
report at bugs.python.org
Fri Jun 17 17:40:05 EDT 2016
Guido van Rossum added the comment:
Thanks! I had eventually pieced together the same explanation. So yes, I
think your fix is right, though I would write it like this:
ret = False
for child in self._children:
ret |= child.cancel()
return ret # True if at least one child.cancel() call returned True
It would also be nice if there was a test for this behavior.
I keep worrying a bit -- a similar bug could exist in other pieces of the
code, or in other libraries. But I guess we can't do much about that.
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