Mutable after move

mut_move.rs

extern crate gtk;
use gtk::prelude::*;

#[derive(Clone)]
struct Client {
    error_counter: i32,
}

impl Client {
    fn new() -> Self {
        Client { error_counter: 0, }
    }
}

fn main() {
    if gtk::init().is_err() {
        println!("Failed to initialize GTK.");
        return;
    }
    // Create a Client
    let mut client = Client::new();
    // Client is mutable
    client.error_counter = 1;
    let window = gtk::Window::new(gtk::WindowType::Toplevel);
    let button = gtk::Button::new_with_label("Click me!");
    window.set_title("Mutable after move?");
    window.set_default_size(350, 70);
    window.add(&button);
    window.show_all();

    window.connect_delete_event(|_, _| {
        gtk::main_quit();
        Inhibit(false)
    });

    {   // Client stays mutable, in block
        client.error_counter = 2;
        let mut client = client.clone();
        button.connect_clicked(move |_| {
            // Client is no more mutable
            client.error_counter = 0;
        });
    }
    // Client mus live til here >.<
    client.error_counter = 0;

    gtk::main();
}