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Title: Align codegen passes and opcode metadata with CPython by youknowone · Pull Request #7987 · RustPython/RustPython · GitHub

Open Graph Title: Align codegen passes and opcode metadata with CPython by youknowone · Pull Request #7987 · RustPython/RustPython

X Title: Align codegen passes and opcode metadata with CPython by youknowone · Pull Request #7987 · RustPython/RustPython

Description: A Python Interpreter written in Rust. Contribute to RustPython/RustPython development by creating an account on GitHub.

Open Graph Description: Summary by CodeRabbit Bug Fixes Improved error messages for invalid compiler states and stack-related issues Refactor Enhanced CPython bytecode compatibility through updated code object mars...

X Description: Summary by CodeRabbit Bug Fixes Improved error messages for invalid compiler states and stack-related issues Refactor Enhanced CPython bytecode compatibility through updated code object mars...

Opengraph URL: https://github.com/RustPython/RustPython/pull/7987

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Domain: github.com

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og:image:altSummary by CodeRabbit Bug Fixes Improved error messages for invalid compiler states and stack-related issues Refactor Enhanced CPython bytecode compatibility through updated code object mars...
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Commits131 (131)https://github.com/RustPython/RustPython/pull/7987/commits
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Files changedhttps://github.com/RustPython/RustPython/pull/7987/files
Align codegen passes and opcode metadata with CPythonhttps://github.com/RustPython/RustPython/pull/7987#top
youknowonehttps://github.com/youknowone
RustPython:mainhttps://github.com/RustPython/RustPython/tree/main
youknowone:bytecode-parityhttps://github.com/youknowone/RustPython/tree/bytecode-parity
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youknowonehttps://github.com/youknowone
May 27, 2026https://github.com/RustPython/RustPython/pull/7987#issue-4531476212
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May 27, 2026 16:52https://github.com/RustPython/RustPython/pull/7987#commits-pushed-2eab3ab
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Share marshal ref table between code object and its internalshttps://github.com/RustPython/RustPython/pull/7987/commits/2eab3ab3c74fba36891ad97fbfddf1f3bab23f41
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https://github.com/youknowone
Align PYC magic number, FORMAT_VERSION, and header check with CPython…https://github.com/RustPython/RustPython/pull/7987/commits/286b667e513cf385fc9a87c1fc7916ccc64fa973
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Accept CPython-tagged .pyc as read-only bytecode sourcehttps://github.com/RustPython/RustPython/pull/7987/commits/5d1ec596139ebb02326d4c730417cfaf34c17873
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Apply rustfmt to marshal helpershttps://github.com/RustPython/RustPython/pull/7987/commits/e28c03720706a9b07ceb37be2439afa9889094c3
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Marshal PySlice from format version 4 instead of 5https://github.com/RustPython/RustPython/pull/7987/commits/1d5054bed4ca8e6a2793657efb6e9f258515e537
1d5054bhttps://github.com/RustPython/RustPython/pull/7987/commits/1d5054bed4ca8e6a2793657efb6e9f258515e537
https://github.com/youknowone
Revert "Accept CPython-tagged .pyc as read-only bytecode source"https://github.com/RustPython/RustPython/pull/7987/commits/0fbf8498f7de7642ab5df52d03d3dc3ba0c1186c
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Set marshal FORMAT_VERSION to 5 to match CPython 3.14.5https://github.com/RustPython/RustPython/pull/7987/commits/ce0ac6172db4f85e16af163dac3ab7c54c3cc0e6
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Thread marshal recursion depth through nested code objectshttps://github.com/RustPython/RustPython/pull/7987/commits/93657463add6af6e84a2b89bb52a9d11a343df74
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align compiler to CPythonhttps://github.com/RustPython/RustPython/pull/7987/commits/d4af69b3f94d92f54db4f89b4b26e1988bdd0a90
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Align codegen with CPython compile.chttps://github.com/RustPython/RustPython/pull/7987/commits/3dc37d817d56ba4d45c0a88a9c1a2055f987a274
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Align codegen IR with CPython CFG structureshttps://github.com/RustPython/RustPython/pull/7987/commits/539f3ba63ed9b332aa319ac7c3301a7f3a599f13
539f3bahttps://github.com/RustPython/RustPython/pull/7987/commits/539f3ba63ed9b332aa319ac7c3301a7f3a599f13
https://github.com/youknowone
Match CPython CFG annotation offset arithmetichttps://github.com/RustPython/RustPython/pull/7987/commits/8b5773378389f70ae176043d94dd1e958f486eb4
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Propagate CPython CFG label translation errorshttps://github.com/RustPython/RustPython/pull/7987/commits/11d9f92a7d946fe1ed457eae4391638fcb2710b6
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Align CPython exception target labeling flowhttps://github.com/RustPython/RustPython/pull/7987/commits/b6cd3985f8d4431e11d65edc092bcaa6156d3a45
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https://github.com/youknowone
Propagate CPython CFG traversal stack allocation errorshttps://github.com/RustPython/RustPython/pull/7987/commits/cda874c233621298525e416196c2d7685970b7d5
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Match CPython optimize_load_fast allocation flowhttps://github.com/RustPython/RustPython/pull/7987/commits/e2fd26d9f8c67d63d03b8afb63b534e8e22d31d1
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Propagate CPython basicblock allocation errorshttps://github.com/RustPython/RustPython/pull/7987/commits/9500d4ed29b8ef5ca5454c581b2bc46d5b18e964
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Propagate CPython redundant NOP cleanup errorshttps://github.com/RustPython/RustPython/pull/7987/commits/c45852be08d792cf85889dca3b8122b7175dcd56
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Propagate CPython unused const cleanup errorshttps://github.com/RustPython/RustPython/pull/7987/commits/a85d8f4b369f7f63285c789ee9d603ec8c57f846
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Propagate CPython const folding errorshttps://github.com/RustPython/RustPython/pull/7987/commits/71eb1d7ec4f711b8362156c25a210bad2c92dd74
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Propagate CPython swaptimize allocation errorshttps://github.com/RustPython/RustPython/pull/7987/commits/13f4ef579a42494fc833bacb414d6e6c6dbe7c44
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Match CPython list-to-tuple fold allocationhttps://github.com/RustPython/RustPython/pull/7987/commits/71f9bef6f0db331dae0dbd33c03dd02db0997fe5
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Skip const folding on CPython allocation failureshttps://github.com/RustPython/RustPython/pull/7987/commits/ed0ad7405633971a4a9512abde88a36f7302de95
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Skip subscript folding on CPython allocation failureshttps://github.com/RustPython/RustPython/pull/7987/commits/1e0d4f96046d9286f9941460b3ed6aead3c39e64
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Propagate CPython assembler allocation errorshttps://github.com/RustPython/RustPython/pull/7987/commits/af868ab07d4ca78d77cca46f33510a9afd21e422
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Propagate CPython localsplus allocation errorshttps://github.com/RustPython/RustPython/pull/7987/commits/7571fbd9b29dc7195f65a1d637d9d432d71c3cfa
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Propagate CPython localsplus setup allocation errorshttps://github.com/RustPython/RustPython/pull/7987/commits/bf31c4ab04fa91ab583342acf99d39f14fa5794f
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Propagate CPython jump label map allocation errorshttps://github.com/RustPython/RustPython/pull/7987/commits/df9e93ffa134b23711f92b8bb7bd220d3c3e3de3
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Propagate CPython instruction sequence allocation errorshttps://github.com/RustPython/RustPython/pull/7987/commits/63cdf7e7320a91f2300f9b4e73c5253d0d8019e1
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Propagate CPython instruction label allocation errorshttps://github.com/RustPython/RustPython/pull/7987/commits/b6393209dc82d0133485fd31fd37f2cebee20bf8
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May 27, 2026 16:57https://github.com/RustPython/RustPython/pull/7987#commits-pushed-a7aa5d8
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Match CPython CFG builder allocation assertshttps://github.com/RustPython/RustPython/pull/7987/commits/a7aa5d8432c6614150a94d6fc6ede11f6491ee80
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Match CPython exception stack structurehttps://github.com/RustPython/RustPython/pull/7987/commits/2012265be8d41621d9bc683c5a0d38dce1c5063c
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Match CPython ref stack structurehttps://github.com/RustPython/RustPython/pull/7987/commits/069d44c6e3ac16f0126717843058f2601cfb22f9
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Match CPython CFG traversal stack structurehttps://github.com/RustPython/RustPython/pull/7987/commits/45ef619695569cccade874c83c920bce6405f1c2
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Mirror CPython CFG traversal stack pointerhttps://github.com/RustPython/RustPython/pull/7987/commits/c947c0506f526dcec09d22821a6fb992ba8bf085
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