#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(iter_collect_into)]
fn main() {
    let a = [1, 2, 3];
    let mut vec: Vec<i32> = Vec::with_capacity(6);
    let count = a.iter().collect_into(&mut vec).iter().count();
    assert_eq!(count, vec.len());
    assert_eq!(vec, vec![1, 2, 3]);
    let count = a.iter().collect_into(&mut vec).iter().count();
    assert_eq!(count, vec.len());
    assert_eq!(vec, vec![1, 2, 3, 1, 2, 3]);
}