1 error[E0605]: non-primitive cast: `Kind2` as `u8`
2 --> $DIR/issue-88621.rs:9:13
4 LL | let _ = Kind2::Foo() as u8;
5 | ^^^^^^^^^^^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
7 error: aborting due to 1 previous error
9 For more information about this error, try `rustc --explain E0605`.