rust/src/test/compile-fail/borrowck-issue-2657-1.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 main() {
let x = Some(~1);
match x { //~ NOTE loan of immutable local variable granted here
  Some(ref _y) => {
    let _a = x; //~ ERROR moving out of immutable local variable prohibited due to outstanding loan
  }
  _ => {}
}
}