importasyncioimportcontextvarsname=contextvars.ContextVar('name',default='foo')defexc_handler(*args):assertname.get()=='bar'asyncdeftask():name.set('bar')1/0asyncdefmain():loop=asyncio.get_running_loop()loop.set_exception_handler(exc_handler)asyncio.create_task(task())asyncio.run(main())

Unhandled error in exception handlercontext: {'message': 'Task exception was never retrieved', 'exception': ZeroDivisionError('division by zero'), 'future': <Task finished name='Task-2' coro=<task() done, defined at /workspaces/cpython/main.py:11> exception=ZeroDivisionError('division by zero')>}Traceback (most recent call last):  File "/workspaces/cpython/Lib/asyncio/base_events.py", line 1797, in call_exception_handler    self._exception_handler(self, context)  File "/workspaces/cpython/main.py", line 8, in exc_handler    assert name.get() == 'bar'AssertionError