#![allow(unused_variables)]
fn main() {
    use std::collections::LinkedList;
    let mut list1 = LinkedList::new();
    list1.push_back('a');
    let mut list2 = LinkedList::new();
    list2.push_back('b');
    list2.push_back('c');
    list1.append(&mut list2);
    let mut iter = list1.iter();
    assert_eq!(iter.next(), Some(&'a'));
    assert_eq!(iter.next(), Some(&'b'));
    assert_eq!(iter.next(), Some(&'c'));
    assert!(iter.next().is_none());
    assert!(list2.is_empty());
}