Add #[must_use] to as_type conversions

1 files changed, 2 insertions, 0 deletions

diff --git a/library/alloc/src/sync.rs b/library/alloc/src/sync.rs
index 7dd1bc51560..d0bbab51466 100644
--- a/library/alloc/src/sync.rs
+++ b/library/alloc/src/sync.rs
@@ -822,6 +822,7 @@ impl<T: ?Sized> Arc<T> {
     /// assert_eq!(x_ptr, Arc::as_ptr(&y));
     /// assert_eq!(unsafe { &*x_ptr }, "hello");
     /// ```
+    #[must_use]
     #[stable(feature = "rc_as_ptr", since = "1.45.0")]
     pub fn as_ptr(this: &Self) -> *const T {
         let ptr: *mut ArcInner<T> = NonNull::as_ptr(this.ptr);
@@ -1718,6 +1719,7 @@ impl<T: ?Sized> Weak<T> {
     /// ```
     ///
     /// [`null`]: core::ptr::null "ptr::null"
+    #[must_use]
     #[stable(feature = "weak_into_raw", since = "1.45.0")]
     pub fn as_ptr(&self) -> *const T {
         let ptr: *mut ArcInner<T> = NonNull::as_ptr(self.ptr);