IGNORE does not ignore the error 1452

--source include/have_innodb.inc

CREATE TABLE parent (id INT AUTO_INCREMENT NOT NULL, PRIMARY KEY (id)) ENGINE=INNODB;

CREATE TABLE child 

(

  id INT AUTO_INCREMENT, 

  parent_id INT, 

  INDEX par_ind (parent_id), 

  PRIMARY KEY (id), 

  FOREIGN KEY (parent_id) REFERENCES parent(id) 

) ENGINE=INNODB; 

INSERT INTO parent VALUES (1), (2); 

INSERT IGNORE INTO child VALUES (NULL, 3);

mysqltest: At line 13: query 'INSERT IGNORE INTO child VALUES (NULL, 3)' failed: 1452: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))