alloc: Add tracking issue for rc_downcast

bluss · bluss · commit 3a39d9533062 · 2017-09-15T19:16:22.000+02:00
diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
@@ -611,7 +611,7 @@ impl<T: Clone> Rc<T> {
 
 impl Rc<Any> {
     #[inline]
-    #[unstable(feature = "rc_downcast", issue = "0")]
+    #[unstable(feature = "rc_downcast", issue = "44608")]
     /// Attempt to downcast the `Rc<Any>` to a concrete type.
     ///
     /// # Examples
