gh-128002: fix `asyncio.all_tasks` against concurrent deallocations of tasks by kumaraditya303 · Pull Request #128541 · python/cpython · GitHub

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kumaraditya303:async-finalize

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Audit asyncio thread safety #128002

stop the world in all tasks

awaiting core review

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_PyWeakref_GET_REF

From looking at the crash backtrace, I think the important thing here would be to use _Py_TryIncref in all_tasks like we do in _PyWeakref_GET_REF. This will avoid incref'ing objects that have zero refcount (and are eithe

use _Py_TryIncref to protect against concurrent deallocations

test_asyncio.test_free_threading.TestCFreeThreading.test_all_tasks_race crashes intermittently in free-threaded builds #128656

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topic-free-threading