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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"_tracemalloc__get_object_traceback doesn't handle objects with pre-headers correctly","articleBody":"In the main branch, the function `_tracemalloc__get_object_traceback` doesn't account for objects with preheaders:\r\n\r\nhttps://github.com/python/cpython/blob/ea232716d3de1675478db3a302629ba43194c967/Modules/_tracemalloc.c#L1406-L1414\r\n\r\nThis means that when running with tracemalloc some allocation tracebacks are missing:\r\n\r\n```python\r\nimport warnings\r\n\r\nclass MyClass:\r\n    def __del__(self):\r\n        warnings.warn(\"Uh oh\", ResourceWarning, source=self)\r\n\r\ndef func():\r\n    m = MyClass()\r\n\r\nfunc()\r\n```\r\n\r\n```\r\npython3 -Wd -X tracemalloc=2 example.py\r\n```\r\n\r\ncc @markshannon \n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-101745\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/colesbury","@type":"Person","name":"colesbury"},"datePublished":"2023-01-30T18:04:43.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/101430/cpython/issues/101430"}