#![allow(unused_variables)]
fn main() {
    let mut vec = Vec::with_capacity(10);
    assert_eq!(vec.len(), 0);
    assert!(vec.capacity() >= 10);
    for i in 0..10 {
        vec.push(i);
    }
    assert_eq!(vec.len(), 10);
    assert!(vec.capacity() >= 10);
    vec.push(11);
    assert_eq!(vec.len(), 11);
    assert!(vec.capacity() >= 11);
    let vec_units = Vec::<()>::with_capacity(10);
    assert_eq!(vec_units.capacity(), usize::MAX);
}