// ERROR:11:borrow
unit badrall;

struct Pair { a: i32, b: i32, }

fn take(q: Pair) -> i32 { return q.a; }

fn bad() -> i32 {
    var p = Pair{ a: 1, b: 2 };
    let left = &mut p.a;
    let n = take(p);
    left.^ = 4;
    return n;
}