#![allow(unused_variables)]
fn main() {
    use std::mem;
    let story = String::from("Once upon a time...");
    let mut story = mem::ManuallyDrop::new(story);
    let ptr = story.as_mut_ptr();
    let len = story.len();
    let capacity = story.capacity();
    assert_eq!(19, len);
    let s = unsafe { String::from_raw_parts(ptr, len, capacity) };
    assert_eq!(String::from("Once upon a time..."), s);
}