Auto merge of rust-lang#120843 - matthiaskrgr:rollup-med37z5, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#113671 (Make privacy visitor use types more (instead of HIR))
 - rust-lang#120308 (core/time: avoid divisions in Duration::new)
 - rust-lang#120693 (Invert diagnostic lints.)
 - rust-lang#120704 (A drive-by rewrite of `give_region_a_name()`)
 - rust-lang#120809 (Use `transmute_unchecked` in `NonZero::new`.)
 - rust-lang#120817 (Fix more `ty::Error` ICEs in MIR passes)
 - rust-lang#120828 (Fix `ErrorGuaranteed` unsoundness with stash/steal.)
 - rust-lang#120831 (Startup objects disappearing from sysroot)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

src/lib.rs

@@ -3,6 +3,8 @@
 #![cfg_attr(doc, doc(rust_logo))]
 #![feature(rustc_private)]
 // Note: please avoid adding other feature gates where possible
+#![allow(rustc::diagnostic_outside_of_impl)]
+#![allow(rustc::untranslatable_diagnostic)]
 #![warn(rust_2018_idioms)]
 #![warn(unused_lifetimes)]
 #![warn(unreachable_pub)]