error[E0322]: explicit impls for the `DiscriminantKind` trait are not permitted --> $DIR/forbidden-discriminant-kind-impl.rs:9:1 | LL | impl DiscriminantKind for NewType { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ impl of `DiscriminantKind` not allowed error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0322`.