1 error[E0054]: cannot cast as `bool`
2 --> $DIR/cast-rfc0401-2.rs:16:13
4 LL | let _ = 3 as bool;
5 | ^^^^^^^^^ unsupported cast
7 = help: compare with zero instead
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0054`.