René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Check for ref counting bugs in debug mode caused by immortal objects.","articleBody":"With https://github.com/python/cpython/issues/90699, the identifiers are statically allocated and are immortal. This makes it easy to make reference counting mistakes as they are not detected and cause negative ref count in `_Py_RefTotal`.\r\n\r\nOn my machine the reference count is negative because of missing incref on `\u0026_Py_STR(empty)`:\r\n\r\n```console\r\n@kumaraditya303 ➜ /workspaces/cpython (main) $ ./python -I -X showrefcount -c pass\r\n[-1 refs, 0 blocks]\r\n```\r\nPR https://github.com/python/cpython/pull/94850 fixes this issue.\r\n\r\n---\r\n\r\nTo make it easy to discover reference counting issue, I propose to after each runtime finalization check that all the static allocated immortal objects have ref count of `999999999` otherwise `_PyObject_Dump` can be used to output the object and abort the process in debug mode and this will help prevent these kinds of issues of \"unstable\"  ref count.\r\n\r\ncc @ericsnowcurrently \n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-102684\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/kumaraditya303","@type":"Person","name":"kumaraditya303"},"datePublished":"2022-07-14T10:19:12.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/94851/cpython/issues/94851"}