Auto merge of #18317 - lnicola:sync-from-rust, r=Veykril

minor: sync from downstream

2 files changed, 1 insertions, 2 deletions

diff --git a/library/core/src/array/ascii.rs b/library/core/src/array/ascii.rs
index 05797b042ee..e2faef855bc 100644
--- a/library/core/src/array/ascii.rs
+++ b/library/core/src/array/ascii.rs
@@ -9,7 +9,6 @@ impl<const N: usize> [u8; N] {
     ///
     /// ```
     /// #![feature(ascii_char)]
-    /// #![feature(const_option)]
     ///
     /// const HEX_DIGITS: [std::ascii::Char; 16] =
     ///     *b"0123456789abcdef".as_ascii().unwrap();
diff --git a/library/core/src/array/mod.rs b/library/core/src/array/mod.rs
index 24c42bc85dd..9b28b8b613e 100644
--- a/library/core/src/array/mod.rs
+++ b/library/core/src/array/mod.rs
@@ -146,7 +146,7 @@ pub const fn from_ref<T>(s: &T) -> &[T; 1] {
 
 /// Converts a mutable reference to `T` into a mutable reference to an array of length 1 (without copying).
 #[stable(feature = "array_from_ref", since = "1.53.0")]
-#[rustc_const_unstable(feature = "const_array_from_ref", issue = "90206")]
+#[rustc_const_stable(feature = "const_array_from_ref", since = "1.83.0")]
 pub const fn from_mut<T>(s: &mut T) -> &mut [T; 1] {
     // SAFETY: Converting `&mut T` to `&mut [T; 1]` is sound.
     unsafe { &mut *(s as *mut T).cast::<[T; 1]>() }