rust/src/test/compile-fail/borrowck-vec-pattern-tail-element-loan.rs

// Copyright 2014 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 a<'a>() -> &'a int {
    let vec = vec!(1, 2, 3, 4);
    let vec: &[int] = vec.as_slice(); //~ ERROR `vec` does not live long enough
    let tail = match vec {
        [_a, tail..] => &tail[0],
        _ => fail!("foo")
    };
    tail
}

fn main() {
    let fifth = a();
    println!("{}", *fifth);
}