Round 3 test fixes and conflicts

src/libcore/array.rs

@@ -45,7 +45,7 @@ macro_rules! array_impls {
             #[stable(feature = "rust1", since = "1.0.0")]
             impl<T: Hash> Hash for [T; $N] {
                 fn hash<H: hash::Hasher>(&self, state: &mut H) {
-                    Hash::hash(&self[], state)
+                    Hash::hash(&self[..], state)
                 }
             }
 

src/libcore/hash/mod.rs

@@ -494,13 +494,4 @@ mod impls {
             state.write_usize(*self as usize)
         }
     }
-
-    #[stable(feature = "rust1", since = "1.0.0")]
-    impl<'a, T, B: ?Sized> Hash for Cow<'a, T, B>
-        where B: Hash + ToOwned<T>
-    {
-        fn hash<H: Hasher>(&self, state: &mut H) {
-            Hash::hash(&**self, state)
-        }
-    }
 }

src/libcore/marker.rs

@@ -233,11 +233,18 @@ pub struct Managed;
 
 macro_rules! impls{
     ($t: ident) => (
+        #[cfg(stage0)]
         impl<T:?Sized, S: Hasher> Hash<S> for $t<T> {
             #[inline]
             fn hash(&self, _: &mut S) {
             }
         }
+        #[cfg(not(stage0))]
+        impl<T:?Sized> Hash for $t<T> {
+            #[inline]
+            fn hash<H: Hasher>(&self, _: &mut H) {
+            }
+        }
 
         impl<T:?Sized> cmp::PartialEq for $t<T> {
             fn eq(&self, _other: &$t<T>) -> bool {