{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"diag.span_label(self.label,"}]}
        diag.span_label(self.label, fluent::lint_label);
        diag.primary_message(fluent::lint_ungated_async_fn_track_caller);
        rustc_session::parse::add_feature_diagnostics(