assign mpsc_is_disconnected issue 153668

library/std/src/sync/mpsc.rs

diff --git a/library/std/src/sync/mpsc.rs b/library/std/src/sync/mpsc.rs
index 2abf7bf..a1c49bb 100644
--- a/library/std/src/sync/mpsc.rs
+++ b/library/std/src/sync/mpsc.rs
@@ -626,7 +626,7 @@ pub fn send(&self, t: T) -> Result<(), SendError<T>> {
     /// drop(rx);
     /// assert!(tx.is_disconnected());
     /// ```
-    #[unstable(feature = "mpsc_is_disconnected", issue = "none")]
+    #[unstable(feature = "mpsc_is_disconnected", issue = "153668")]
     pub fn is_disconnected(&self) -> bool {
         self.inner.is_disconnected()
     }
@@ -1080,7 +1080,7 @@ pub fn try_iter(&self) -> TryIter<'_, T> {
     /// drop(tx);
     /// assert!(rx.is_disconnected());
     /// ```
-    #[unstable(feature = "mpsc_is_disconnected", issue = "none")]
+    #[unstable(feature = "mpsc_is_disconnected", issue = "153668")]
     pub fn is_disconnected(&self) -> bool {
         self.inner.is_disconnected()
     }