{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"err.span_label(within_macro_span,"}]}
            err.span_label(within_macro_span, "due to this macro variable");
        if let Some(within_macro_span) = span.within_macro(expr.span, self.tcx.sess.source_map()) {
        }