// 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.

struct foo(~int);

fn borrow(x: @mut foo) {
    let _y = &***x; //~ ERROR illegal borrow unless pure
    *x = foo(~4); //~ NOTE impure due to assigning to dereference of mutable @ pointer
}

fn main() {
}