clippy 0.0.155

A bunch of helpful lints to avoid common pitfalls in Rust
Documentation 
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#![feature(plugin)]
#![plugin(clippy)]
#![allow(unused)]
#![warn(clippy)]

fn main() {
    let v = Some(true);
    match v {
        Some(x) => (),
        y @ _   => (),
    }
    match v {
        Some(x)  => (),
        y @ None => (),  // no error
    }
}