Chris Jerdonek <[email protected]> added the comment:
This issue was just resolved by the combination of #40607 followed by #31033
(merged for 3.9.0 beta 1).
Running the example code above now results in the following:
Traceback (most recent call last):
File "/.../cpython/test-31131.py", line 5, in run
await asyncio.sleep(1000000)
File "/.../cpython/Lib/asyncio/tasks.py", line 669, in sleep
return await future
asyncio.exceptions.CancelledError
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/.../cpython/Lib/asyncio/tasks.py", line 507, in wait_for
fut.result()
asyncio.exceptions.CancelledError
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/.../cpython/test-31131.py", line 15, in <module>
main(run())
File "/.../cpython/test-31131.py", line 11, in main
loop.run_until_complete(future)
File "/.../cpython/Lib/asyncio/base_events.py", line 642, in
run_until_complete
return future.result()
File "/.../cpython/Lib/asyncio/tasks.py", line 509, in wait_for
raise exceptions.TimeoutError() from exc
asyncio.exceptions.TimeoutError
As you can see the traceback now includes the exception chain from the
TimeoutError to the point of interruption: await asyncio.sleep(1000000).
----------
resolution: -> duplicate
stage: -> resolved
status: open -> closed
superseder: -> Improve traceback of cancelled tasks / add cancel() msg argument
versions: +Python 3.9 -Python 3.6
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Python tracker <[email protected]>
<https://bugs.python.org/issue31131>
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