JIT: Fixed possible memory leak

Author: dstogov

ext/opcache/jit/zend_jit_helpers.c

@@ -777,6 +777,12 @@ static zval* ZEND_FASTCALL zend_jit_fetch_dim_w_helper(zend_array *ht, zval *dim
 		default:
 			zend_jit_illegal_string_offset(dim);
 			undef_result_after_exception();
+			if ((EG(opline_before_exception)+1)->opcode == ZEND_OP_DATA
+			 && ((EG(opline_before_exception)+1)->op1_type & (IS_VAR|IS_TMP_VAR))) {
+				zend_execute_data *execute_data = EG(current_execute_data);
+
+				zval_ptr_dtor_nogc(EX_VAR((EG(opline_before_exception)+1)->op1.var));
+			}
 			return NULL;
 	}