rust/src/test/compile-fail/liveness-break-uninit.rs

// Copyright 2012 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.

fn foo() -> int {
    let x: int;

    loop {
        break;
        x = 0;  //~ WARNING unreachable statement
    }

    log(debug, x); //~ ERROR use of possibly uninitialized variable: `x`

    return 17;
}

fn main() { log(debug, foo()); }