From 4ec5cdc94b83e1a37c628033597c17c4d7645128 Mon Sep 17 00:00:00 2001
From: Ibraheem Ahmed <ibrah1440@gmail.com>
Date: Fri, 3 Dec 2021 16:06:13 -0500
Subject: [PATCH] fix stability annotations for `Box::downcast`

---
 library/alloc/src/boxed.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/library/alloc/src/boxed.rs b/library/alloc/src/boxed.rs
index e6f687ddf96..4898b9ca8fc 100644
--- a/library/alloc/src/boxed.rs
+++ b/library/alloc/src/boxed.rs
@@ -1500,7 +1500,7 @@ impl<A: Allocator> Box<dyn Any, A> {
     /// print_if_string(Box::new(0i8));
     /// ```
     #[inline]
-    #[stable(feature = "box_send_sync_any_downcast", since = "1.51.0")]
+    #[stable(feature = "rust1", since = "1.0.0")]
     pub fn downcast<T: Any>(self) -> Result<Box<T, A>, Self> {
         if self.is::<T>() { unsafe { Ok(self.downcast_unchecked::<T>()) } } else { Err(self) }
     }
@@ -1559,7 +1559,7 @@ impl<A: Allocator> Box<dyn Any + Send, A> {
     /// print_if_string(Box::new(0i8));
     /// ```
     #[inline]
-    #[stable(feature = "box_send_sync_any_downcast", since = "1.51.0")]
+    #[stable(feature = "rust1", since = "1.0.0")]
     pub fn downcast<T: Any>(self) -> Result<Box<T, A>, Self> {
         if self.is::<T>() { unsafe { Ok(self.downcast_unchecked::<T>()) } } else { Err(self) }
     }