error[E0369]: binary operation `%` cannot be applied to type `&&{integer}`
  --> $DIR/binary-op-on-double-ref.rs:14:9
   |
LL |         x % 2 == 0
   |         ^^^^^
   |
   = help: `%` can be used on '&{integer}', you can dereference `x`: `*x`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0369`.