test: clear deprecation warnings in tcp-stress

Signed-off-by: Luca Bruno <lucab@debian.org>

src/test/run-pass/tcp-stress.rs

@@ -18,25 +18,26 @@ use std::io::prelude::*;
 use std::net::{TcpListener, TcpStream};
 use std::process;
 use std::sync::mpsc::channel;
+use std::time::Duration;
 use std::thread::{self, Builder};
 
 fn main() {
     // This test has a chance to time out, try to not let it time out
     thread::spawn(move|| -> () {
-        thread::sleep_ms(30 * 1000);
+        thread::sleep(Duration::from_secs(30));
         process::exit(1);
     });
 
-    let mut listener = TcpListener::bind("127.0.0.1:0").unwrap();
+    let listener = TcpListener::bind("127.0.0.1:0").unwrap();
     let addr = listener.local_addr().unwrap();
     thread::spawn(move || -> () {
         loop {
             let mut stream = match listener.accept() {
                 Ok(stream) => stream.0,
-                Err(error) => continue,
+                Err(_) => continue,
             };
-            stream.read(&mut [0]);
-            stream.write(&[2]);
+            let _ = stream.read(&mut [0]);
+            let _ = stream.write(&[2]);
         }
     });
 
@@ -47,8 +48,8 @@ fn main() {
         let res = Builder::new().stack_size(64 * 1024).spawn(move|| {
             match TcpStream::connect(addr) {
                 Ok(mut stream) => {
-                    stream.write(&[1]);
-                    stream.read(&mut [0]);
+                    let _ = stream.write(&[1]);
+                    let _ = stream.read(&mut [0]);
                 },
                 Err(..) => {}
             }