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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"PYTHONMALLOCSTATS=1 fails with fatal error at Python exit","articleBody":"`Py_FinalizeEx()` calls `_PyObject_DebugMallocStats()` which calls indirectly `_PyInterpreterState_GET()`. Problem: at this point, there is no \"interpreter\" anymore, and so `_PyInterpreterState_GET()` fails with a fatal error.\r\n\r\nIt's a regression introduced by commit df3173d28ef25a0f97d2cca8cf4e64e062a08d06. Python 3.12 is also affected.\r\n\r\nReproducer:\r\n\r\n```\r\n$ PYTHONMALLOCSTATS=1 ./python -c pass\r\nSmall block threshold = 512, in 32 size classes.\r\n(...)\r\nTotal                              =              262,144\r\n\r\nSmall block threshold = 512, in 32 size classes.\r\n(...)\r\nTotal                              =              655,360\r\n\r\nFatal Python error: _PyInterpreterState_GET: the function must be called with the GIL held, after Python initialization and before Python finalization, but the GIL is released (the current Python thread state is NULL)\r\nPython runtime state: finalizing (tstate=0x0000000000ae7550)\r\n\r\nAbandon (core dumped)\r\n```\r\n\r\ncc @ericsnowcurrently \n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-120021\n* gh-120022\n* gh-120023\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/vstinner","@type":"Person","name":"vstinner"},"datePublished":"2023-10-30T15:11:17.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/111499/cpython/issues/111499"}