Rollup of 9 pull requests Successful merges: - rust-lang/rust#148690 (Implement `clamp_magnitude` method for primitive floats & signed integers) - rust-lang/rust#149102 (stabilize maybe_uninit_slice) - rust-lang/rust#149269 (cmse: do not calculate the layout of a type with infer types) - rust-lang/rust#149299 (Fudge infer vars in the cause code of `Obligation` intentionally) - rust-lang/rust#149344 (Don't suggest unwrap for Result in const) - rust-lang/rust#149358 (fix(parse): Limit frontmatter fences to 255 dashes ) - rust-lang/rust#149445 (make assoc fn inherit const stability from inherent `const impl` blocks) - rust-lang/rust#149479 (Fix indent in E0591.md) - rust-lang/rust#149496 (Fix rust-lang/rust#148889: Add label rib when visiting delegation body) r? `@ghost` `@rustbot` modify labels: rollup