{"ast_node_type":"other","tokens":[{"end":49,"kind":"keyword","start":0,"text":"self.predecessors[succ]"}]}
            self.predecessors[succ] -= num_edges;
            debug_assert_eq!(new_succ, _new_succ);
            self.update_predecessor_count(basic_blocks[new_succ].terminator(), Update::Incr);