error[E0369]: binary operation `%` cannot be applied to type `&&{integer}`
  --> $DIR/binary-op-on-double-ref.rs:14:9
   |
LL |         x % 2 == 0
   |         ^^^^^
   |
   = note: this is a reference to a type that `%` can be applied to; you need to dereference this variable once for this operation to work
   = note: an implementation of `std::ops::Rem` might be missing for `&&{integer}`

error: aborting due to previous error

If you want more information on this error, try using "rustc --explain E0369"