Auto merge of rust-lang#132664 - matthiaskrgr:rollup-i27nr7i, r=matth…

…iaskrgr

Rollup of 5 pull requests

Successful merges:

 - rust-lang#131261 (Stabilize `UnsafeCell::from_mut`)
 - rust-lang#131405 (bootstrap/codegen_ssa: ship llvm-strip and use it for -Cstrip)
 - rust-lang#132077 (Add a new `wide-arithmetic` feature for WebAssembly)
 - rust-lang#132562 (Remove the `wasm32-wasi` target from rustc)
 - rust-lang#132660 (Remove unused errs.rs file)

Failed merges:

 - rust-lang#131721 (Add new unstable feature `const_eq_ignore_ascii_case`)

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

core/src/cell.rs

@@ -2122,7 +2122,6 @@ impl<T: ?Sized> UnsafeCell<T> {
     /// # Examples
     ///
     /// ```
-    /// # #![feature(unsafe_cell_from_mut)]
     /// use std::cell::UnsafeCell;
     ///
     /// let mut val = 42;
@@ -2132,7 +2131,9 @@ impl<T: ?Sized> UnsafeCell<T> {
     /// assert_eq!(*uc.get_mut(), 41);
     /// ```
     #[inline(always)]
-    #[unstable(feature = "unsafe_cell_from_mut", issue = "111645")]
+    #[stable(feature = "unsafe_cell_from_mut", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "unsafe_cell_from_mut", since = "CURRENT_RUSTC_VERSION")]
+    #[cfg_attr(bootstrap, rustc_allow_const_fn_unstable(const_mut_refs))]
     pub const fn from_mut(value: &mut T) -> &mut UnsafeCell<T> {
         // SAFETY: `UnsafeCell<T>` has the same memory layout as `T` due to #[repr(transparent)].
         unsafe { &mut *(value as *mut T as *mut UnsafeCell<T>) }