diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs
index c8ad8f0c10d0d..4b45307c4699c 100644
--- a/compiler/rustc_codegen_llvm/src/lib.rs
+++ b/compiler/rustc_codegen_llvm/src/lib.rs
@@ -6,6 +6,7 @@
 
 // tidy-alphabetical-start
 #![allow(internal_features)]
+#![cfg_attr(bootstrap, feature(slice_as_array))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(assert_matches)]
@@ -16,7 +17,6 @@
 #![feature(iter_intersperse)]
 #![feature(macro_derive)]
 #![feature(rustdoc_internals)]
-#![feature(slice_as_array)]
 #![feature(trim_prefix_suffix)]
 #![feature(try_blocks)]
 // tidy-alphabetical-end
diff --git a/library/alloc/src/boxed.rs b/library/alloc/src/boxed.rs
index 7ad1679b1c822..381eaeb809f27 100644
--- a/library/alloc/src/boxed.rs
+++ b/library/alloc/src/boxed.rs
@@ -850,7 +850,7 @@ impl<T> Box<[T]> {
     /// This operation does not reallocate; the underlying array of the slice is simply reinterpreted as an array type.
     ///
     /// If `N` is not exactly equal to the length of `self`, then this method returns `None`.
-    #[unstable(feature = "slice_as_array", issue = "133508")]
+    #[unstable(feature = "alloc_slice_into_array", issue = "148082")]
     #[inline]
     #[must_use]
     pub fn into_array<const N: usize>(self) -> Option<Box<[T; N]>> {
diff --git a/library/alloc/src/rc.rs b/library/alloc/src/rc.rs
index a24ea6e526c4b..f0ce6aa03a8ba 100644
--- a/library/alloc/src/rc.rs
+++ b/library/alloc/src/rc.rs
@@ -1166,7 +1166,7 @@ impl<T> Rc<[T]> {
     /// This operation does not reallocate; the underlying array of the slice is simply reinterpreted as an array type.
     ///
     /// If `N` is not exactly equal to the length of `self`, then this method returns `None`.
-    #[unstable(feature = "slice_as_array", issue = "133508")]
+    #[unstable(feature = "alloc_slice_into_array", issue = "148082")]
     #[inline]
     #[must_use]
     pub fn into_array<const N: usize>(self) -> Option<Rc<[T; N]>> {
diff --git a/library/alloc/src/sync.rs b/library/alloc/src/sync.rs
index 13b5cf23e72d8..b85293973fd5c 100644
--- a/library/alloc/src/sync.rs
+++ b/library/alloc/src/sync.rs
@@ -1314,7 +1314,7 @@ impl<T> Arc<[T]> {
     /// This operation does not reallocate; the underlying array of the slice is simply reinterpreted as an array type.
     ///
     /// If `N` is not exactly equal to the length of `self`, then this method returns `None`.
-    #[unstable(feature = "slice_as_array", issue = "133508")]
+    #[unstable(feature = "alloc_slice_into_array", issue = "148082")]
     #[inline]
     #[must_use]
     pub fn into_array<const N: usize>(self) -> Option<Arc<[T; N]>> {
diff --git a/library/core/src/lib.rs b/library/core/src/lib.rs
index f1948fc778ce2..1f66c43c73dbe 100644
--- a/library/core/src/lib.rs
+++ b/library/core/src/lib.rs
@@ -121,7 +121,6 @@
 #![feature(ptr_alignment_type)]
 #![feature(ptr_metadata)]
 #![feature(set_ptr_value)]
-#![feature(slice_as_array)]
 #![feature(slice_ptr_get)]
 #![feature(str_internals)]
 #![feature(str_split_inclusive_remainder)]
diff --git a/library/core/src/ptr/const_ptr.rs b/library/core/src/ptr/const_ptr.rs
index 451092709443b..84a6982d56805 100644
--- a/library/core/src/ptr/const_ptr.rs
+++ b/library/core/src/ptr/const_ptr.rs
@@ -1462,7 +1462,8 @@ impl<T> *const [T] {
     /// Gets a raw pointer to the underlying array.
     ///
     /// If `N` is not exactly equal to the length of `self`, then this method returns `None`.
-    #[unstable(feature = "slice_as_array", issue = "133508")]
+    #[stable(feature = "core_slice_as_array", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "core_slice_as_array", since = "CURRENT_RUSTC_VERSION")]
     #[inline]
     #[must_use]
     pub const fn as_array<const N: usize>(self) -> Option<*const [T; N]> {
diff --git a/library/core/src/ptr/mut_ptr.rs b/library/core/src/ptr/mut_ptr.rs
index 24ee92bdd6e1b..85d54b4d3b9b3 100644
--- a/library/core/src/ptr/mut_ptr.rs
+++ b/library/core/src/ptr/mut_ptr.rs
@@ -1712,7 +1712,8 @@ impl<T> *mut [T] {
     /// Gets a raw, mutable pointer to the underlying array.
     ///
     /// If `N` is not exactly equal to the length of `self`, then this method returns `None`.
-    #[unstable(feature = "slice_as_array", issue = "133508")]
+    #[stable(feature = "core_slice_as_array", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "core_slice_as_array", since = "CURRENT_RUSTC_VERSION")]
     #[inline]
     #[must_use]
     pub const fn as_mut_array<const N: usize>(self) -> Option<*mut [T; N]> {
diff --git a/library/core/src/slice/mod.rs b/library/core/src/slice/mod.rs
index 96c1034f9735f..1d88eb33dce10 100644
--- a/library/core/src/slice/mod.rs
+++ b/library/core/src/slice/mod.rs
@@ -841,7 +841,8 @@ impl<T> [T] {
     /// Gets a reference to the underlying array.
     ///
     /// If `N` is not exactly equal to the length of `self`, then this method returns `None`.
-    #[unstable(feature = "slice_as_array", issue = "133508")]
+    #[stable(feature = "core_slice_as_array", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "core_slice_as_array", since = "CURRENT_RUSTC_VERSION")]
     #[inline]
     #[must_use]
     pub const fn as_array<const N: usize>(&self) -> Option<&[T; N]> {
@@ -859,7 +860,8 @@ impl<T> [T] {
     /// Gets a mutable reference to the slice's underlying array.
     ///
     /// If `N` is not exactly equal to the length of `self`, then this method returns `None`.
-    #[unstable(feature = "slice_as_array", issue = "133508")]
+    #[stable(feature = "core_slice_as_array", since = "CURRENT_RUSTC_VERSION")]
+    #[rustc_const_stable(feature = "core_slice_as_array", since = "CURRENT_RUSTC_VERSION")]
     #[inline]
     #[must_use]
     pub const fn as_mut_array<const N: usize>(&mut self) -> Option<&mut [T; N]> {