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Rollup merge of #151711 - folkertdev:stdarch-sync-2026-01-26, r=folkertdev
stdarch subtree update
Subtree update of `stdarch` to https://github.com/rust-lang/stdarch/commit/9ba0a3f392ccffbe347c8ae1c67a247e2ed1d173.
Created using https://github.com/rust-lang/josh-sync.
r? @ghost