fix(rustup): update to latest rustc

Cargo.toml

@@ -16,6 +16,7 @@ cookie = "*"
 httparse = "*"
 log = ">= 0.2.0"
 mime = "*"
+num_cpus = "*"
 openssl = "*"
 rustc-serialize = "*"
 time = "*"

benches/client.rs

@@ -1,3 +1,4 @@
+#![deny(warnings)]
 #![feature(collections, io, net, test)]
 extern crate hyper;
 

benches/server.rs

@@ -1,4 +1,5 @@
-#![feature(io, net, test)]
+#![deny(warnings)]
+#![feature(net, test)]
 extern crate hyper;
 extern crate test;
 

examples/client.rs

@@ -4,6 +4,7 @@ extern crate hyper;
 extern crate env_logger;
 
 use std::env;
+use std::io;
 
 use hyper::Client;
 
@@ -20,12 +21,12 @@ fn main() {
 
     let mut client = Client::new();
 
-    let res = match client.get(&*url).send() {
+    let mut res = match client.get(&*url).send() {
         Ok(res) => res,
         Err(err) => panic!("Failed to connect: {:?}", err)
     };
 
     println!("Response: {}", res.status);
     println!("Headers:\n{}", res.headers);
-    //TODO: add copy back when std::stdio impls std::io::Write.
+    io::copy(&mut res, &mut io::stdout()).unwrap();
 }

examples/hello.rs

@@ -1,5 +1,5 @@
 #![deny(warnings)]
-#![feature(io, net)]
+#![feature(net)]
 extern crate hyper;
 extern crate env_logger;
 

examples/server.rs

@@ -1,5 +1,5 @@
 #![deny(warnings)]
-#![feature(io, net)]
+#![feature(net)]
 extern crate hyper;
 extern crate env_logger;
 

src/lib.rs

@@ -1,4 +1,4 @@
-#![feature(core, collections, io, net, os, path,
+#![feature(core, collections, io, net,
            std_misc, box_syntax, unsafe_destructor)]
 #![deny(missing_docs)]
 #![cfg_attr(test, deny(warnings))]
@@ -133,6 +133,7 @@ extern crate openssl;
 extern crate cookie;
 extern crate unicase;
 extern crate httparse;
+extern crate num_cpus;
 
 #[macro_use]
 extern crate log;

src/server/mod.rs

@@ -2,10 +2,11 @@
 use std::io::{BufReader, BufWriter};
 use std::marker::PhantomData;
 use std::net::{IpAddr, SocketAddr};
-use std::os;
 use std::path::Path;
 use std::thread::{self, JoinGuard};
 
+use num_cpus;
+
 pub use self::request::Request;
 pub use self::response::Response;
 
@@ -83,7 +84,7 @@ impl<'a, H: Handler + 'static> Server<'a, H, HttpListener> {
 
     /// Binds to a socket and starts handling connections.
     pub fn listen(self, ip: IpAddr, port: u16) -> HttpResult<Listening> {
-        self.listen_threads(ip, port, os::num_cpus() * 5 / 4)
+        self.listen_threads(ip, port, num_cpus::get() * 5 / 4)
     }
 }
 impl<