error[E0606]: casting `FieldLessWithNonExhaustiveVariant` as `u8` is invalid --> $DIR/enum-as-cast.rs:9:13 | LL | let d = e as u8; | ^^^^^^^ | = note: cannot cast an enum with a non-exhaustive variant when it's defined in another crate error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0606`.