error[E0369]: cannot mod `&&{integer}` by `{integer}` --> $DIR/binary-op-on-double-ref.rs:5:11 | LL | x % 2 == 0 | - ^ - {integer} | | | &&{integer} | help: `%` can be used on `{integer}`, you can dereference `x` | LL | *x % 2 == 0 | + error: aborting due to previous error For more information about this error, try `rustc --explain E0369`.