// 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 concat<T: Copy>(v: ~[const ~[const T]]) -> ~[T] {
    let mut r = ~[];

    // Earlier versions of our type checker accepted this:
    vec::each(v, |inner: &~[T]| {
        //~^ ERROR values differ in mutability
        r += *inner; true
    });

    return r;
}

fn main() {}