error[E0597]: `y` does not live long enough
  --> $DIR/E0597.rs:18:17
   |
18 |     x.x = Some(&y);
   |                 ^ borrowed value does not live long enough
19 |     //~^ `y` does not live long enough [E0597]
20 | }
   | - `y` dropped here while still borrowed
   |
   = note: values in a scope are dropped in the opposite order they are created

error: aborting due to previous error

If you want more information on this error, try using "rustc --explain E0597"