#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#[derive(Default)]
struct AddrTracker(Option<usize>);
impl AddrTracker {
    fn check_for_move(&mut self) {
        let current_addr = self as *mut Self as usize;
        match self.0 {
            None => self.0 = Some(current_addr),
            Some(prev_addr) => assert_eq!(prev_addr, current_addr),
        }
    }
}
fn main() {
    let mut tracker = AddrTracker::default();
    tracker.check_for_move();
    let mut tracker = tracker;
}