std: fix fallout

src/libstd/sync/mpsc/mod.rs

@@ -936,7 +936,9 @@ impl<T: Send> select::Packet for Receiver<T> {
 }
 
 #[unstable]
-impl<'a, T: Send> Iterator<T> for Iter<'a, T> {
+impl<'a, T: Send> Iterator for Iter<'a, T> {
+    type Item = T;
+
     fn next(&mut self) -> Option<T> { self.rx.recv().ok() }
 }
 

src/libstd/sync/mpsc/select.rs

@@ -319,7 +319,9 @@ impl<'rx, T: Send> Drop for Handle<'rx, T> {
     }
 }
 
-impl Iterator<*mut Handle<'static, ()>> for Packets {
+impl Iterator for Packets {
+    type Item = *mut Handle<'static, ()>;
+
     fn next(&mut self) -> Option<*mut Handle<'static, ()>> {
         if self.cur.is_null() {
             None