fp.rs

fn main() {

    // works
    let a = [1, 2, 3, 4, 5];
    let b: ~[int] = a.iter().map(|&x| x * 2).collect();
    println!("{:?}", b);

    // fails
    let c = [1, 2, 3, 4, 5];
    let d: ~[int] = a.iter().filter(|&x| *x > 2).collect();
    println!("{:?}", d);
}

// filter.rs:8:21: 8:59 error: expected std::iter::FromIterator<&int>,
//                      but found std::iter::FromIterator<int> (expected &-ptr but found int)
// filter.rs:8     let d: ~[int] = a.iter().filter(|&x| *x > 2).collect();