regression - update statement hangs server on MariaDB 10.0.3

CREATE TABLE valid (

id SMALLINT NOT NULL AUTO_INCREMENT,

name VARCHAR (200) NOT NULL,

create_time DATETIME NOT NULL,

create_by INTEGER NOT NULL,

change_time DATETIME NOT NULL,

change_by INTEGER NOT NULL,

PRIMARY KEY(id),

UNIQUE INDEX valid_name (name)

);

CREATE TABLE users (

id INTEGER NOT NULL AUTO_INCREMENT,

login VARCHAR (200) NOT NULL,

pw VARCHAR (64) NOT NULL,

title VARCHAR (50) NULL,

first_name VARCHAR (100) NOT NULL,

last_name VARCHAR (100) NOT NULL,

valid_id SMALLINT NOT NULL,

create_time DATETIME NOT NULL,

create_by INTEGER NOT NULL,

change_time DATETIME NOT NULL,

change_by INTEGER NOT NULL,

PRIMARY KEY(id),

UNIQUE INDEX users_login (login)

);

INSERT INTO valid (id, name, create_by, create_time, change_by, change_time)

VALUES

(1, 'valid', 1, current_timestamp, 1, current_timestamp);

INSERT INTO users (id, first_name, last_name, login, pw, valid_id, create_by, create_time, change_by, change_time)

VALUES

(1, 'Admin', 'OTRS', 'root@localhost', 'roK20XGbWEsSM', 1, 1, current_timestamp, 1, current_timestamp);

ALTER TABLE valid ADD CONSTRAINT FK_valid_create_by_id FOREIGN KEY (create_by) REFERENCES users (id);

ALTER TABLE valid ADD CONSTRAINT FK_valid_change_by_id FOREIGN KEY (change_by) REFERENCES users (id);

ALTER TABLE users ADD CONSTRAINT FK_users_create_by_id FOREIGN KEY (create_by) REFERENCES users (id);

ALTER TABLE users ADD CONSTRAINT FK_users_change_by_id FOREIGN KEY (change_by) REFERENCES users (id);

ALTER TABLE users ADD CONSTRAINT FK_users_valid_id_id FOREIGN KEY (valid_id) REFERENCES valid (id);

update users set pw = 'foo' where id = 1;