reservation, please?

gistfile1.txt

use core::dvec::DVec;

fn main() {
    let v : DVec<int> = DVec();
    v.reserve(1);
    v.set_elt(0, 12345);
    debug!("v=%?", v);

}

[burg@burg-macchiato Desktop]# ./test
rust: task failed at 'index out of bounds: the len is 0 but the index is 0', test.rs:1
rust: domain main @0x7f9553000010 root task failed