Crash report

This was discovered in an asyncio program when interrupted with CTRL - C.
Minimal Reproducer:

import gc import inspect gc.set_threshold(1, 0, 0) f = [] def cb(*args): f.append(inspect.stack()) gc.callbacks.append(cb) def gen(): yield 1 g = gen() g.__next__()

Error messages

python: Python/ceval.c:5436: _PyEval_EvalFrameDefault: Assertion `frame->frame_obj == NULL' failed. Aborted (core dumped)

Your environment

• CPython versions tested on: Python 3.12.0a0 51fd4de, Python 3.11.0b3+ 41e4b42
• Operating system and architecture: Linux 5.4.0-1074-azure

cc @markshannon @pablogsal