// option. This file may not be copied, modified, or distributed
// except according to those terms.
-#[deriving(Show)]
+#![allow(unknown_features)]
+#![feature(box_syntax)]
+
+#[derive(Debug)]
struct Foo(Box<[u8]>);
pub fn main() {
- println!("{}", Foo(box [0, 1, 2]));
+ println!("{:?}", Foo(box [0, 1, 2]));
}