Rollup of 6 pull requests
Successful merges:
- #111121 (Work around `rust-analyzer` false-positive type errors)
- #111759 (Leverage the interval property to precompute borrow kill points.)
- #111841 (Run AST validation on match guards correctly)
- #111862 (Split out opaque collection from from `type_of`)
- #111863 (Don't skip mir typeck if body has errors)
- #111903 (Migrate GUI colors test to original CSS color format)
r? `@ghost`
`@rustbot` modify labels: rollup
096309e6dc