Segmentation fault in match.

This code:

<pre>
enum Command {
    Create{qname:~str},
    Help,
    Unknown,
}

fn main() {
    let val = Unknown;

    match val{
        Create{qname: qname} => {
            print(fmt!("Create %?", qname));
        }
        Help => {
            print(~"Help");
        }
        _ => {
            print(~"Other");
        }
    }
}
</pre>


Gives segmentation fault in runtime.
