error[E0054]: cannot cast `i32` as `bool` --> $DIR/E0054.rs:3:24 | LL | let x_is_nonzero = x as bool; | ^^^^^^^^^ | help: compare with zero instead | LL | let x_is_nonzero = x != 0; | ~~~~ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0054`.