{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"debug!(\"init_from_succ(ln={},"}]}
        debug!("init_from_succ(ln={}, succ={})", self.ln_str(ln), self.ln_str(succ_ln));
        self.rwu_table.copy(ln, succ_ln);
    }