Sync from rust 5c49c4f7c8

patches/0027-sysroot_tests-128bit-atomic-operations.patch

@@ -14,11 +14,10 @@ diff --git a/coretests/tests/lib.rs b/coretests/tests/lib.rs
 index 1e336bf..35e6f54 100644
 --- a/coretests/tests/lib.rs
 +++ b/coretests/tests/lib.rs
-@@ -2,5 +2,4 @@
+@@ -2,4 +2,3 @@
  // tidy-alphabetical-start
 -#![cfg_attr(target_has_atomic = "128", feature(integer_atomics))]
  #![cfg_attr(test, feature(cfg_select))]
- #![feature(alloc_layout_extra)]
  #![feature(array_ptr_get)]
 diff --git a/coretests/tests/atomic.rs b/coretests/tests/atomic.rs
 index b735957..ea728b6 100644

src/lib.rs

@@ -1,6 +1,4 @@
 // tidy-alphabetical-start
-#![allow(rustc::diagnostic_outside_of_impl)]
-#![allow(rustc::untranslatable_diagnostic)]
 // Note: please avoid adding other feature gates where possible
 #![feature(rustc_private)]
 // Only used to define intrinsics in `compiler_builtins.rs`.