> Yury's theory: maybe BEFORE_ASYNC_WITH's error-handling path is forgetting to DECREF the object. Nope, that doesn't seem to be it. This version prints "refcount: 2" twice, *and* prints a proper "was never awaited" warning: ----- import sys async def open_file(): pass async def main(): open_file_coro = open_file() print("refcount:", sys.getrefcount(open_file_coro)) try: async with open_file_coro: pass except: pass print("refcount:", sys.getrefcount(open_file_coro)) coro = main() try: coro.send(None) except: pass