error[E0594]: cannot assign to immutable borrowed content `*my_ref`
  --> $DIR/issue-51244.rs:13:5
   |
LL |     let ref my_ref @ _ = 0;
   |         --- consider changing this to `ref mut`
LL |     *my_ref = 0;
   |     ^^^^^^^^^^^ cannot borrow as mutable

error: aborting due to previous error

For more information about this error, try `rustc --explain E0594`.