php7扩展开发 内存泄漏

[teamade]

HashTable *array, *tmp_h;
    zend_string *key, *delim;
    zval *keys;
    zend_long limit = ZEND_LONG_MAX;
    zval *tmp, *val_key;
    char *delim_str = ".";

#ifndef FAST_ZPP
    if (zend_parse_parameters(ZEND_NUM_ARGS(), "hS!", &array, &key) == FAILURE) {
        return;
    }
#else
    ZEND_PARSE_PARAMETERS_START(2, 2)
        Z_PARAM_ARRAY_HT(array)
        Z_PARAM_STR(key)
    ZEND_PARSE_PARAMETERS_END();
#endif
    if (!zend_hash_num_elements(array)) {
        RETURN_FALSE;
    }

    if (key == NULL) {
        RETURN_FALSE;
    }

    if (zend_symtable_exists_ind(array, key)) {
        RETURN_TRUE;
    }

    delim = zend_string_init(delim_str, 1, 0);

    array_init(keys);
    php_explode(delim, key, keys, limit);

    tmp_h = array;  /*  */
    ZEND_HASH_FOREACH_VAL(Z_ARRVAL_P(keys), val_key) {
        if (zend_symtable_exists_ind(tmp_h, Z_STR_P(val_key))) {
            tmp = zend_symtable_find_ind(tmp_h, Z_STR_P(val_key));
            if (tmp != NULL && Z_TYPE_P(tmp) == IS_ARRAY) {
                tmp_h = Z_ARRVAL_P(tmp);
            }
        } else {
            zval_ptr_dtor(keys);
            zend_string_release(delim);
            RETURN_FALSE;
        }
    } ZEND_HASH_FOREACH_END();

    zval_ptr_dtor(keys);
    zend_string_release(delim);

    RETURN_TRUE;

这段代码中运行的时候，提示有内存泄漏

请问是哪里出现了问题