error[E0369]: cannot calculate the remainder of `&&{integer}` divided by `{integer}`
  --> $DIR/binary-op-on-double-ref.rs:5:11
   |
LL |         x % 2 == 0
   |         - ^ - {integer}
   |         |
   |         &&{integer}
   |
help: `%` can be used on `&{integer}` if you dereference the left-hand side
   |
LL |         *x % 2 == 0
   |         +

error: aborting due to previous error

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