{"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"cx.macro_error_and_trace_macros_diag();"}]}
            cx.macro_error_and_trace_macros_diag();
                diagnostics::failed_to_match_macro(cx.psess(), sp, def_span, name, arg, rules);
            DummyResult::any(span, guar)