Deprecate Rc::into_raw_non_null and Arc::into_raw_non_null

Author: SimonSapin

src/liballoc/rc.rs

@@ -636,6 +636,7 @@ impl<T: ?Sized> Rc<T> {
     ///
     /// ```
     /// #![feature(rc_into_raw_non_null)]
+    /// #![allow(deprecated)]
     ///
     /// use std::rc::Rc;
     ///
@@ -645,6 +646,7 @@ impl<T: ?Sized> Rc<T> {
     /// assert_eq!(deref, "hello");
     /// ```
     #[unstable(feature = "rc_into_raw_non_null", issue = "47336")]
+    #[rustc_deprecated(since = "1.44.0", reason = "use `Rc::into_raw` instead")]
     #[inline]
     pub fn into_raw_non_null(this: Self) -> NonNull<T> {
         // safe because Rc guarantees its pointer is non-null

src/liballoc/sync.rs

@@ -635,6 +635,7 @@ impl<T: ?Sized> Arc<T> {
     ///
     /// ```
     /// #![feature(rc_into_raw_non_null)]
+    /// #![allow(deprecated)]
     ///
     /// use std::sync::Arc;
     ///
@@ -644,6 +645,7 @@ impl<T: ?Sized> Arc<T> {
     /// assert_eq!(deref, "hello");
     /// ```
     #[unstable(feature = "rc_into_raw_non_null", issue = "47336")]
+    #[rustc_deprecated(since = "1.44.0", reason = "use `Rc::into_raw` instead")]
     #[inline]
     pub fn into_raw_non_null(this: Self) -> NonNull<T> {
         // safe because Arc guarantees its pointer is non-null