UnsafeCell now has no niches, ever.

oli-obk · oli-obk · commit 78fe1bda7459 · 2022-07-07T10:46:22.000Z
diff --git a/core/src/cell.rs b/core/src/cell.rs
@@ -1856,7 +1856,6 @@ impl<T: ?Sized + fmt::Display> fmt::Display for RefMut<'_, T> {
 #[lang = "unsafe_cell"]
 #[stable(feature = "rust1", since = "1.0.0")]
 #[repr(transparent)]
-#[repr(no_niche)] // rust-lang/rust#68303.
 pub struct UnsafeCell<T: ?Sized> {
     value: T,
 }
diff --git a/core/src/lib.rs b/core/src/lib.rs
@@ -191,7 +191,6 @@
 #![feature(never_type)]
 #![feature(no_core)]
 #![feature(no_coverage)] // rust-lang/rust#84605
-#![feature(no_niche)] // rust-lang/rust#68303
 #![feature(platform_intrinsics)]
 #![feature(prelude_import)]
 #![feature(repr_simd)]

Original file line number	Diff line number	Diff line change
`@@ -1856,7 +1856,6 @@ impl<T: ?Sized + fmt::Display> fmt::Display for RefMut<'_, T> {`
`1856`	`1856`	`#[lang = "unsafe_cell"]`
`1857`	`1857`	`#[stable(feature = "rust1", since = "1.0.0")]`
`1858`	`1858`	`#[repr(transparent)]`
`1859`		`-#[repr(no_niche)] // rust-lang/rust#68303.`
`1860`	`1859`	`pub struct UnsafeCell<T: ?Sized> {`
`1861`	`1860`	`value: T,`
`1862`	`1861`	`}`