{"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"debug!(\"still"}]}
            debug!("still needs substitution");
        InstanceKind::DropGlue(_, Some(ty)) if ty.has_type_flags(TypeFlags::HAS_CT_PARAM) => {
            return Err("implementation limitation -- HACK for dropping polymorphic type");