{"ast_node_type":"variable","tokens":[{"end":42,"kind":"keyword","start":0,"text":"if"}]}
            if let Some(span) = finalize {
        if let RibKind::ForwardGenericParamBan(reason) = all_ribs[rib_index].kind {
                let res_error = if rib_ident.name == kw::SelfUpper {