this doesn't work

gistfile1.rs

fn tail<A:copy, IA:iterable<A>>(self:IA) -> fn@(fn(A)) {
    ret fn@(blk:fn(A)) {
        let mut first:bool = true;
        self.iter {|a|
            if (!first) {
                blk(a);
            } else {
                first = false;
            }
        }
    }
}