rust/src/test/compile-fail/disallowed-deconstructing-destructing-struct.rs

struct X {
    x: ~str,
}

impl X : Drop {
    fn finalize() {
        error!("value: %s", self.x);
    }
}

fn unwrap(+x: X) -> ~str {
    let X { x: y } = x; //~ ERROR deconstructing struct not allowed in pattern
    y
}

fn main() {
    let x = X { x: ~"hello" };
    let y = unwrap(x);
    error!("contents: %s", y);
}