9c09c1f7cf
Rollup of 8 pull requests Successful merges: - #81940 (Stabilize str_split_once) - #82165 (Reword labels on E0308 involving async fn return type) - #82456 (Replaced some unwrap_or and map_or with lazy variants) - #82491 (Consider inexpensive inlining criteria first) - #82506 (Properly account for non-shorthand pattern field in unused variable lint) - #82535 (Set codegen thread names) - #82545 (rustdoc: add optional woff2 versions of FiraSans.) - #82549 (Revert "Update normalize.css to 8.0.1") Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.