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Implement PyStackRef borrowed stack references for LOAD_FAST_BORROW by youknowone · Pull Request #7290 · RustPython/RustPython

youknowone

@youknowone

coderabbitai[bot]

…wed refs

- Change PyStackRef.bits from usize to NonZeroUsize so Option<PyStackRef>
  has the same size as Option<PyObjectRef> via niche optimization
- Revert LoadFastBorrow to use clone instead of actual borrowed refs
  to avoid borrowed refs remaining on stack at yield points
- Add static size assertions for Option<PyStackRef>
- Add stackref, fastlocal to cspell dictionary
- Remove debug eprintln statements
- Fix clippy warning for unused push_borrowed

@youknowone

coderabbitai[bot]

coderabbitai[bot]

youknowone added a commit to youknowone/RustPython that referenced this pull request

Mar 22, 2026 
…ustPython#7290)

* Implement PyStackRef borrowed stack references for LOAD_FAST_BORROW

* Fix PyStackRef: use NonZeroUsize for niche optimization, revert borrowed refs

- Change PyStackRef.bits from usize to NonZeroUsize so Option<PyStackRef>
  has the same size as Option<PyObjectRef> via niche optimization
- Revert LoadFastBorrow to use clone instead of actual borrowed refs
  to avoid borrowed refs remaining on stack at yield points
- Add static size assertions for Option<PyStackRef>
- Add stackref, fastlocal to cspell dictionary
- Remove debug eprintln statements
- Fix clippy warning for unused push_borrowed

* Add borrowed ref debug_assert to InstrumentedYieldValue, clean up comments