From 89f120840684c56bdc4919767175e5831d80c42c Mon Sep 17 00:00:00 2001
From: malezjaa <poreba.kris@gmail.com>
Date: Mon, 28 Sep 2026 21:23:45 +0200
Subject: [PATCH] stabilize {Arc,Rc}::is_unique

---
 library/alloc/src/rcs/arc.rs | 6 +-----
 library/alloc/src/rcs/rc.rs  | 6 +-----
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/library/alloc/src/rcs/arc.rs b/library/alloc/src/rcs/arc.rs
index e61ea5193eccb..981e8fd1a0251 100644
--- a/library/alloc/src/rcs/arc.rs
+++ b/library/alloc/src/rcs/arc.rs
@@ -2870,8 +2870,6 @@ impl<T: ?Sized, A: Allocator> Arc<T, A> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(arc_is_unique)]
-    ///
     /// use std::sync::Arc;
     ///
     /// let x = Arc::new(3);
@@ -2894,8 +2892,6 @@ impl<T: ?Sized, A: Allocator> Arc<T, A> {
     /// following code is valid, even though it would be UB if it used `Arc::get_mut`:
     ///
     /// ```
-    /// #![feature(arc_is_unique)]
-    ///
     /// use std::sync::Arc;
     ///
     /// let arc = Arc::new(5);
@@ -2915,7 +2911,7 @@ impl<T: ?Sized, A: Allocator> Arc<T, A> {
     ///
     /// [`get_mut_unchecked`]: Self::get_mut_unchecked
     #[inline]
-    #[unstable(feature = "arc_is_unique", issue = "138938")]
+    #[stable(feature = "arc_is_unique", since = "CURRENT_RUSTC_VERSION")]
     pub fn is_unique(this: &Self) -> bool {
         // lock the weak pointer count if we appear to be the sole weak pointer
         // holder.
diff --git a/library/alloc/src/rcs/rc.rs b/library/alloc/src/rcs/rc.rs
index 04e08c47fb587..a5bb5c13ecb5a 100644
--- a/library/alloc/src/rcs/rc.rs
+++ b/library/alloc/src/rcs/rc.rs
@@ -1996,8 +1996,6 @@ impl<T: ?Sized, A: Allocator> Rc<T, A> {
     /// # Examples
     ///
     /// ```
-    /// #![feature(arc_is_unique)]
-    ///
     /// use std::rc::Rc;
     ///
     /// let x = Rc::new(3);
@@ -2020,8 +2018,6 @@ impl<T: ?Sized, A: Allocator> Rc<T, A> {
     /// following code is valid, even though it would be UB if it used `Rc::get_mut`:
     ///
     /// ```
-    /// #![feature(arc_is_unique)]
-    ///
     /// use std::rc::Rc;
     ///
     /// let rc = Rc::new(5);
@@ -2032,7 +2028,7 @@ impl<T: ?Sized, A: Allocator> Rc<T, A> {
     ///
     /// [`get_mut_unchecked`]: Self::get_mut_unchecked
     #[inline]
-    #[unstable(feature = "arc_is_unique", issue = "138938")]
+    #[stable(feature = "arc_is_unique", since = "CURRENT_RUSTC_VERSION")]
     pub fn is_unique(this: &Self) -> bool {
         Rc::weak_count(this) == 0 && Rc::strong_count(this) == 1
     }