fix test

Author: Girgias

Zend/Optimizer/dfa_pass.c

@@ -941,8 +941,9 @@ static int zend_dfa_optimize_jmps(zend_op_array *op_array, zend_ssa *ssa)
 							do {
 								backtracking_block_num--;
 							} while (backtracking_block_num >= 0
-								&& !(ssa->cfg.blocks[block_num].flags & ZEND_BB_REACHABLE));
+								&& !(ssa->cfg.blocks[backtracking_block_num].flags & ZEND_BB_REACHABLE));
 							if (backtracking_block_num >= 0) {
+								block_num = backtracking_block_num;
 								continue;
 							}
 						}