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Title: Bytecode parity - exception by youknowone · Pull Request #7557 · RustPython/RustPython · GitHub

Open Graph Title: Bytecode parity - exception by youknowone · Pull Request #7557 · RustPython/RustPython

X Title: Bytecode parity - exception by youknowone · Pull Request #7557 · RustPython/RustPython

Description: Summary by CodeRabbit Bug Fixes Corrected exception rethrow/unwind behavior across try/except/finally and exception-group paths. Fixed exception stack handling during frame resumption and generator/coroutine resumption. Performance New bytecode optimization passes: tuple-unpack simplification, dead-store elimination, and swap removal. Added rewrites and peephole adjustments to reduce redundant ops and nops; added checks for uninitialized loads. Tooling Added bytecode dump and comparison CLI tools for cross-interpreter validation. Refactor Simplified frame/exception-context APIs and internal exception-slot model.

Open Graph Description: Summary by CodeRabbit Bug Fixes Corrected exception rethrow/unwind behavior across try/except/finally and exception-group paths. Fixed exception stack handling during frame resumption and genera...

X Description: Summary by CodeRabbit Bug Fixes Corrected exception rethrow/unwind behavior across try/except/finally and exception-group paths. Fixed exception stack handling during frame resumption and genera...

Opengraph URL: https://github.com/RustPython/RustPython/pull/7557

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1bc0546 Fix exception handling: except* chaining, finally cleanup, RERAISE youknowone Apr 10, 2026 https://github.com/RustPython/RustPython/pull/7557/commits/1bc05466c56e82339181b145ad9a1809ef95f280
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