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`.