1 files changed, 2 insertions, 21 deletions
diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 41541619945..5f8789bf1c7 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -113,28 +113,9 @@ impl<S: hash::Writer, Sized? T: Hash<S>> Hash<S> for Box<T> {
     }
 }
 
-#[cfg(not(stage0))]
-impl Box<Any> {
-    pub fn downcast<T: 'static>(self) -> Result<Box<T>, Box<Any>> {
-        if self.is::<T>() {
-            unsafe {
-                // Get the raw representation of the trait object
-                let to: TraitObject =
-                    mem::transmute::<Box<Any>, TraitObject>(self);
-
-                // Extract the data pointer
-                Ok(mem::transmute(to.data))
-            }
-        } else {
-            Err(self)
-        }
-    }
-}
-
 /// Extension methods for an owning `Any` trait object.
 #[unstable = "post-DST and coherence changes, this will not be a trait but \
               rather a direct `impl` on `Box<Any>`"]
-#[cfg(stage0)]
 pub trait BoxAny {
     /// Returns the boxed value if it is of type `T`, or
     /// `Err(Self)` if it isn't.
@@ -142,10 +123,10 @@ pub trait BoxAny {
     fn downcast<T: 'static>(self) -> Result<Box<T>, Self>;
 }
 
-#[stable]
-#[cfg(stage0)]
 impl BoxAny for Box<Any> {
     #[inline]
+    #[unstable = "method may be renamed with respect to other downcasting \
+                  methods"]
     fn downcast<T: 'static>(self) -> Result<Box<T>, Box<Any>> {
         if self.is::<T>() {
             unsafe {