chore: change default lint level to warning and deny warnings in CI (#1416)

tokio/examples/chat.rs

@@ -25,7 +25,7 @@
 //! messages.
 
 #![feature(async_await)]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use futures::{Poll, SinkExt, Stream, StreamExt};
 use std::{collections::HashMap, env, error::Error, io, net::SocketAddr, pin::Pin, task::Context};

tokio/examples/connect.rs

@@ -14,7 +14,7 @@
 //! this repository! Many of them recommend running this as a simple "hook up
 //! stdin/stdout to a server" to get up and running.
 
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 #![feature(async_await)]
 
 use futures::{SinkExt, Stream};

tokio/examples/echo-udp.rs

@@ -11,7 +11,7 @@
 //! Each line you type in to the `nc` terminal should be echo'd back to you!
 
 #![feature(async_await)]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use std::error::Error;
 use std::net::SocketAddr;

tokio/examples/echo.rs

@@ -20,7 +20,7 @@
 //! should be able to see them all make progress simultaneously.
 
 #![feature(async_await)]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use tokio;
 use tokio::io::{AsyncReadExt, AsyncWriteExt};

tokio/examples/hello_world.rs

@@ -11,7 +11,7 @@
 //!
 //!     cargo run --example hello_world
 
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 #![feature(async_await)]
 
 use tokio;

tokio/examples/proxy.rs

@@ -20,7 +20,7 @@
 //! This final terminal will connect to our proxy, which will in turn connect to
 //! the echo server, and you'll be able to see data flowing between them.
 
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 #![feature(async_await)]
 
 use futures::{future::try_join, FutureExt, StreamExt};

tokio/examples/tinydb.rs

@@ -40,7 +40,7 @@
 //!   returning the previous value, if any.
 
 #![feature(async_await)]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use std::collections::HashMap;
 use std::env;

tokio/examples/tinyhttp.rs

@@ -11,7 +11,7 @@
 //! respectively. By default this will run I/O on all the cores your system has
 //! available, and it doesn't support HTTP request bodies.
 
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 #![feature(async_await)]
 
 use bytes::BytesMut;

tokio/examples/udp-client.rs

@@ -27,7 +27,7 @@
 //! connection the server needs to be run first, otherwise the client will block forever.
 
 #![feature(async_await)]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use std::env;
 use std::error::Error;

tokio/examples/udp-codec.rs

@@ -8,7 +8,7 @@
 
 #![feature(async_await)]
 #![cfg(feature = "rt-full")]
-#![deny(warnings, rust_2018_idioms)]
+#![warn(rust_2018_idioms)]
 
 use tokio::io;
 use tokio::net::UdpSocket;