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`.