E0001.rs

// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#![deny(unreachable_patterns)]

fn main() {
    let foo = Some(1);
    match foo {
        Some(_) => {/* ... */}
        None => {/* ... */}
        _ => {/* ... */} //~ ERROR unreachable pattern
    }
}