New submission from Matt Johnston:
asyncio.Event.wait() doesn't seem to be cancelled by asyncio.wait_for(). Ctrl-c
in the attached example produces output below. I'm not certain the code is
correct though the documentation for wait_for() suggests it should work.
Without the wait_for() it doesn't suffer from pending task destruction. This is
Python 3.4.3.
Hello World!
Hello World!
^CTraceback (most recent call last):
File "./loop2.py", line 27, in <module>
loop.run_until_complete(hello_world())
File
"/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/asyncio/base_events.py",
line 304, in run_until_complete
self.run_forever()
File
"/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/asyncio/base_events.py",
line 276, in run_forever
self._run_once()
File
"/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/asyncio/base_events.py",
line 1136, in _run_once
event_list = self._selector.select(timeout)
File
"/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/selectors.py",
line 502, in select
kev_list = self._kqueue.control(None, max_ev, timeout)
KeyboardInterrupt
Task was destroyed but it is pending!
task: <Task pending coro=<wait() running at
/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/asyncio/locks.py:242>
wait_for=<Future pending cb=[Task._wakeup()]> cb=[_release_waiter(<Future
pendi...sk._wakeup()]>)() at
/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/asyncio/tasks.py:335]>
[1] 8134 exit 1 ../venv3/bin/python3 ./loop2.py
----------
components: asyncio
files: loop2.py
messages: 242269
nosy: gvanrossum, haypo, matt, yselivanov
priority: normal
severity: normal
status: open
title: asyncio.Event.wait() Task was destroyed but it is pending
versions: Python 3.4
Added file: http://bugs.python.org/file39234/loop2.py
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