error[E0277]: the trait bound `Kind: std::default::Default` is not satisfied --> $DIR/skip_without_default.rs:22:12 | 22 | #[clap(skip)] | ^^^^ the trait `std::default::Default` is not implemented for `Kind` | = note: required by `std::default::Default::default` For more information about this error, try `rustc --explain E0277`.