{"ast_node_type":"other","tokens":[{"end":24,"kind":"keyword","start":0,"text":"err.code(E0748);"}]}
        err.code(E0748);
            self.dcx().struct_span_fatal(self.mk_sp(start, start), "unterminated raw string");
        err.span_label(self.mk_sp(start, start), "unterminated raw string");