ZEND_API void _zval_ptr_dtor(zval *zval_ptr ZEND_FILE_LINE_DC) /* {{{ */
{
	i_zval_ptr_dtor(zval_ptr ZEND_FILE_LINE_RELAY_CC);
}
/* }}} */

The product uses a function that accepts a format string as an argument, but the format string originates from an external source.