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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Instrumentation assertion failure when calling the registered handler explicitly","articleBody":"# Bug report\n\n### Bug description:\n\nOn my mac M1 Sonoma (14.5), Python 3.13.0b4,  I see this crash when registering an opcode monitor, calling the handler explicitly while it's enabled, and then restarting events. To reproduce:\n\n```python\nimport sys\n\ndef mymonitor(code, instruction_offset):\n    pass\n\ntool_id = 4\nsys.monitoring.use_tool_id(tool_id, \"mytool\")\nsys.monitoring.register_callback(\n    tool_id,\n    sys.monitoring.events.INSTRUCTION,\n    mymonitor,\n)\nsys.monitoring.set_events(tool_id, sys.monitoring.events.INSTRUCTION)\nmymonitor(None, 0)  # call the *same* handler while it is registered                                                                                                                                                                                                                       \nsys.monitoring.restart_events()\n```\n\nTriggers an assertion failure (my minimal debugging suggests it's about some inconsistency with the \"instrumentation_version\"):\n```\n$ 3.13.0b4-debug/bin/python -X dev repro.py\nAssertion failed: (debug_check_sanity(tstate-\u003einterp, code)), function _Py_call_instrumentation_instruction, file instrumentation.c, line 1347.\nFatal Python error: Aborted\n\nCurrent thread 0x00000002064b0c00 (most recent call first):\n  File \"/Users/phillipschanely/proj/CrossHair/repro.py\", line 4 in mymonitor\n  File \"/Users/phillipschanely/proj/CrossHair/repro.py\", line 16 in \u003cmodule\u003e\nzsh: abort      /Users/phillipschanely/.pyenv/versions/3.13.0b4-debug/bin/python -X dev \n```\n\nThanks for investigating!\n\n### CPython versions tested on:\n\n3.13\n\n### Operating systems tested on:\n\nmacOS\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-122251\n* gh-122812\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/pschanely","@type":"Person","name":"pschanely"},"datePublished":"2024-07-24T21:51:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/122247/cpython/issues/122247"}