René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"TaskGroup's task's exception's participate in a reference cycle, via TaskGroup.create_task -\u003e task -\u003e exception and loop.create_task -\u003e task -\u003e exception","articleBody":"# Bug report\n\n### Bug description:\n\nthe following test fails when run with eager tasks\n\n```python\n    async def test_exception_refcycles_parent_task(self):\n        \"\"\"Test that TaskGroup deletes self._parent_task\"\"\"\n        tg = asyncio.TaskGroup()\n        exc = None\n\n        class _Done(Exception):\n            pass\n\n        async def coro_fn():\n            async with tg:\n                raise _Done\n\n        try:\n            async with asyncio.TaskGroup() as tg2:\n                tg2.create_task(coro_fn())\n        except* _Done as excs:\n            exc = excs.exceptions[0].exceptions[0]\n\n        self.assertIsInstance(exc, _Done)\n        self.assertListEqual(gc.get_referrers(exc), no_other_refs())\n```\n\n### CPython versions tested on:\n\n3.14\n\n### Operating systems tested on:\n\nLinux\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-128553\n* gh-128585\n* gh-128586\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/graingert","@type":"Person","name":"graingert"},"datePublished":"2025-01-06T18:13:58.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/128552/cpython/issues/128552"}