auto merge of #14186 : omasanori/rust/suppress-warnings, r=alexcrichton

src/libcollections/hashmap.rs

@@ -1906,7 +1906,7 @@ mod test_map {
         }
         assert_eq!(m.len(), 32);
 
-        let mut observed = 0;
+        let mut observed: u32 = 0;
 
         for (k, v) in m.iter() {
             assert_eq!(*v, *k * 2);
@@ -2102,7 +2102,7 @@ mod test_set {
         for i in range(0u, 32) {
             assert!(a.insert(i));
         }
-        let mut observed = 0;
+        let mut observed: u32 = 0;
         for k in a.iter() {
             observed |= 1 << *k;
         }

src/libstd/io/net/tcp.rs

@@ -1116,7 +1116,7 @@ mod test {
             spawn(proc() {
                 tx.send(TcpStream::connect(addr.ip.to_str(), port).unwrap());
             });
-            let l = rx.recv();
+            let _l = rx.recv();
             for i in range(0, 1001) {
                 match a.accept() {
                     Ok(..) => break,