{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"ty::GenericParamDefKind::Lifetime"}]}
            ty::GenericParamDefKind::Lifetime => ty::Region::new_error_misc(tcx).into(),
        match &self.kind {
            ty::GenericParamDefKind::Type { .. } => Ty::new_misc_error(tcx).into(),