Re: [PATCH V4 2/3] python: use qom-list-get

[Markus Armbruster <armbru@redhat.com>]

John Snow <jsnow@redhat.com> writes:

> On Wed, Jul 16, 2025 at 4:32 AM Markus Armbruster <armbru@redhat.com> wrote:
>>
>> John Snow <jsnow@redhat.com> writes:
>>
>> > On Fri, Jul 11, 2025, 10:47 AM Markus Armbruster <armbru@redhat.com> wrote:
>>
>> [...]
>>
>> >> Exception ignored in: <function QEMUMonitorProtocol.__del__ at 0x7fcfcd080d60>
>> >> Traceback (most recent call last):
>> >>   File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/legacy.py", line 310, in __del__
>> >>     self.close()
>> >>   File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/legacy.py", line 281, in close
>> >>     self._sync(
>> >>   File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/legacy.py", line 102, in _sync
>> >>     return self._aloop.run_until_complete(
>> >>   File "/usr/lib64/python3.13/asyncio/base_events.py", line 719, in run_until_complete
>> >>     return future.result()
>> >>   File "/usr/lib64/python3.13/asyncio/tasks.py", line 507, in wait_for
>> >>     return await fut
>> >>   File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/protocol.py", line 399, in disconnect
>> >>     await self._wait_disconnect()
>> >>   File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/protocol.py", line 719, in _wait_disconnect
>> >>     await all_defined_tasks  # Raise Exceptions from the bottom half.
>> >>   File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/protocol.py", line 870, in _bh_loop_forever
>> >>     await async_fn()
>> >> RuntimeError: cannot reuse already awaited coroutine
>> >
>> > Curious about this backtrace. It looks like something has gone
>> > fundamentally wrong in the internals and the error is being raised by the
>> > garbage collector which is not ideal.
>> >
>> > Can you help me reproduce this? Even if it's old/bad code, I don't want
>> > python-qemu-qmp faulting like this.
>>
>> Reproducer for Fedora 41, current master c079d3a31e4:
>>
>> Run
>>
>>     $ qemu-system-x86_64 -S -display none -chardev socket,id=mon1,path=test-qmp,server=on,wait=off -mon mode=control,id=qmp,chardev=mon1
>>
>> and
>>
>>     $ scripts/qmp/qom-tree -s test-qmp >/dev/null
>>
>> Questions?
>>
>
> Doesn't seem to trigger for me on Fedora 42 from the c079d3a31e4
> build. Is this a Python version difference thing rearing its head?

I have no idea.

Is there anything else I can do to help you?