Auto merge of #12868 - lowr:follow-up-on-12832, r=lnicola
Auto merge of #12868 - lowr:follow-up-on-12832, r=lnicola

Replace `debug_assert!` with `stdx::always!`

Addresses https://github.com/rust-lang/rust-analyzer/pull/12832#issuecomment-1193713473

rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer