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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Incorrect output due to Tier 2 `_LOAD_CONST_INLINE`","articleBody":"# Bug report\r\n\r\nI've constructed a sneaky way to break the `remove_globals()` optimization, by executing a code object in two different globals dicts. (Credit goes to @brandtbucher who [started](https://github.com/python/cpython/issues/117045#issuecomment-2008283808) the conversation about this topic, though [this particular example](https://github.com/python/cpython/issues/117045#issuecomment-2008371267) is mine.)\r\n\r\nTake this code:\r\n```py\r\nsrc = \"\"\"\r\ndef f():\r\n    global x\r\n    def inner(i):\r\n        a = 1\r\n        for _ in range(100):\r\n            a = x + i\r\n        return a\r\n    return inner\r\n\r\nfunc = f()\r\n\"\"\"\r\n\r\nco = compile(src, __file__, \"exec\")\r\n\r\nns1 = {\"x\": 1000}\r\neval(co, ns1)\r\nfunc1 = ns1[\"func\"]\r\nfor i in range(1000):\r\n    x = func1(i)\r\nprint(x)\r\n\r\nns2 = {\"x\": 2000}\r\neval(co, ns2)\r\nfunc2 = ns2[\"func\"]\r\nfor i in range(1000):\r\n    x = func2(i)\r\nprint(x)\r\n```\r\n\r\nThis *should* print\r\n```\r\n1999\r\n2999\r\n```\r\n(try it with Python 3.12, or Python 3.13 **without JIT or `-Xuops`**).\r\n\r\nHowever with current main (**EDIT:** when using JIT or `-Xuops`) it prints\r\n```\r\n1999\r\n1999\r\n```\r\n:-(","author":{"url":"https://github.com/gvanrossum","@type":"Person","name":"gvanrossum"},"datePublished":"2024-03-20T00:09:31.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/117051/cpython/issues/117051"}