Rust error message

error[E0597]: `x` does not live long enough
  --> src/main.rs:62:14
   |
62 |         r = &x;
   |              ^ borrowed value does not live long enough
63 |     }
   |     - `x` dropped here while still borrowed
64 |     assert_eq!(*r, 0);
65 | }
   | - borrowed value needs to live until here