rust/src/test/run-pass/uniq-cc.rs

enum maybe_pointy {
    none,
    p(@pointy),
}

type pointy = {
    mut a : maybe_pointy,
    c : ~int,
    d : fn~()->(),
};

fn empty_pointy() -> @pointy {
    ret @{
        mut a : none,
        c : ~22,
        d : fn~()->(){},
    }
}

fn main()
{
    let v = empty_pointy();
    v.a = p(v);
}