INSERT IGNORE refuses to ignore foreign key constraints. Bug maybe?

Is this a bug?

INSERT IGNORE refuses to ignore ERROR 1452, as is described in http://stackoverflow.com/questions/6849393/mysqls-insert-ignore-into-foreign-keys. To regenerate the error:

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);

ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`financedb`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))

Server version: 10.0.21-MariaDB-log MariaDB Server