René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Check `_boostrap_external.MAGIC_NUMBER` has changed when bytecode compatibility was broken to before merging in CI","articleBody":"## Summary\n\nI think a GitHub Actions workflow to check `_boostrap_external.MAGIC_NUMBER` has changed when bytecode compatibility was broken, is needed to help contributors without blocking from bytecode cache(`.pyc` files), and let contributors who working on bytecode(compiler) know that the MAGIC_NUMBER should be updated.\n\nNOTE: This issue is not about blaming any contributors, but about automatically preventing problems.\n\n## Workaround\n\nNow, if you're blocked by the following errors, you can bypass it by removing all .pyc files. `rm -r **/*.pyc`\n\n```\nencodings initialization failed. Only utf-8 encoding will be supported.\nTraceback (most recent call last):\n  File \"_frozen_importlib\", line 1467, in __import__\n  File \"_frozen_importlib\", line 1388, in _gcd_import\n  File \"_frozen_importlib\", line 1361, in _find_and_load\n  File \"_frozen_importlib\", line 1332, in _find_and_load_unlocked\n  File \"_frozen_importlib\", line 936, in _load_unlocked\n  File \"_frozen_importlib_external\", line 1019, in exec_module\n  File \"_frozen_importlib_external\", line 1154, in get_code\n  File \"_frozen_importlib_external\", line 781, in _compile_bytecode\nValueError: Couldn't deserialize python bytecode\n\nThe above exception was the direct cause of the following exception:\n\nRuntimeError: RustPython could not import the encodings module. It usually means something went wrong. Please carefully read the following messages and follow the steps.\n...\n```\n\n## Details\n\nI don't have a detail idea yet, but it can be automated if there is a rule to determine `MAGIC_NUMBER`.","author":{"url":"https://github.com/moreal","@type":"Person","name":"moreal"},"datePublished":"2026-01-20T09:54:20.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/6814/RustPython/issues/6814"}