Johannes Ebke added the comment:
Attached is a new version of the patch incorporating the review results.
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Added file: http://bugs.python.org/file43508/fix_and_test_26923_reviewed.patch
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Python tracker
<http://bugs.python.org/issue26
Johannes Ebke added the comment:
Right, that's neater. Attached is a patch with your version and a test. I
checked that it fails with the old version of cancel() and passes with the new
one.
Concerning possible other bugs, I've had a look in the standard library, but
could not fi
Johannes Ebke added the comment:
On rereading my original description, it really is not clearly described why
the calling Task ends up surviving.
Attached is a patch to the 3.5.1 asyncio/tasks.py which adds some print
statements in Task.cancel().
If I execute the cancellation_test.py with
Johannes Ebke added the comment:
Thank you for providing the relevant documentation link.
I just noticed that it should probably be clarified that in case the outer
Future is cancelled, and all children that are not already done ignore the
cancellation (a.k.a. catch the CancelledError), the
New submission from Johannes Ebke:
In a very specific case, asyncio.gather causes a cancel() call on the Task
waiting on the _GatheringFuture to return a false positive. An example program
demonstrating this is attached.
The context: asyncio.gather creates a _GatheringFuture with a list of
