error[E0505]: cannot move out of `x` because it is borrowed
  --> $DIR/E0505.rs:9:13
   |
LL |         let _ref_to_val: &Value = &x;
   |                                   -- borrow of `x` occurs here
LL |         eat(x);
   |             ^ move out of `x` occurs here
LL |         _ref_to_val.use_ref();
   |         --------------------- borrow later used here

error: aborting due to previous error

For more information about this error, try `rustc --explain E0505`.