Merge ref '292be5c7c051' from rust-lang/rust

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: 292be5c7c05138d753bbd4b30db7a3f1a5c914f7
Filtered ref: b038f59
Upstream diff: rust-lang/rust@27050c0...292be5c

This merge was created using https://github.com/rust-lang/josh-sync.

Author: The Miri Cronjob Bot

src/lib.rs

@@ -17,7 +17,7 @@
 #![feature(derive_coerce_pointee)]
 #![feature(arbitrary_self_types)]
 #![feature(iter_advance_by)]
-#![cfg_attr(not(bootstrap), feature(duration_from_nanos_u128))]
+#![feature(duration_from_nanos_u128)]
 // Configure clippy and other lints
 #![allow(
     clippy::collapsible_else_if,