Python 3.11 segmentation fault in grpc test; seg. fault in task.get_stack(limit=1) accessing frame.f_back #96
Description
Using grpcio 1.50.0 and Python 3.11.0, the test test_switch1 will fail with a segmentation fault.
Current thread 0x000000011678b600 (most recent call first):
File "/usr/local/Cellar/python@3.11/3.11.0/Frameworks/Python.framework/Versions/3.11/lib/python3.11/asyncio/base_tasks.py", line 53 in _task_get_stack
File "/Users/bfish/code/finsy/.venv_311/lib/python3.11/site-packages/grpc/aio/_channel.py", line 315 in _close
File "/Users/bfish/code/finsy/.venv_311/lib/python3.11/site-packages/grpc/aio/_channel.py", line 374 in close
File "/Users/bfish/code/finsy/finsy/p4client.py", line 308 in close
File "/Users/bfish/code/finsy/finsy/switch.py", line 393 in _run
If I disable the test P4RuntimeServer with an environment variable, the test succeeds.
It seems like there is a memory misbehavior bug in the grpc async server implementation, but client code is tripping over it in _task_get_stack. If I run client code without running any of the server test code, there is no segmentation fault.
For now, the CI tests for Python 3.11 are running with FINSY_TEST_P4RUNTIME_SERVER=skip and FINSY_TEST_GNMI_SERVER=skip.