Move semantics example on front page of book is problematic

[tomjakubowski]

http://doc.rust-lang.org/nightly/book/

So how do we solve this problem? There are two approaches we can take. The first is making a copy rather than using a reference:

fn main() {
    let mut x = vec!["Hello", "world"];

    let y = x[0].clone();

    x.push("foo");
}

Rust has move semantics by default, so if we want to make a copy of some data, we call the clone() method. In this example, y is no longer a reference to the vector stored in x, but a copy of its first element, "Hello". Now that we don’t have a reference, our push() works just fine.

The type of x is Vec<&'static str>. It's not necessary to clone anything here, because reference types are Copy. Even calling x[0].clone() is just copying the pointer into y, not making a copy of the string.

[steveklabnik]

Ahhh bummer. :(

I mean, good for the code, but terrible for me.