Deadlock when attempting to update field with same value

We have a Galera cluster containing two MariaDB servers with multi-master replication.

When I try to update a field inside a table using the value the field already has (e. g. update value "test" with "test") I get the following error, no matter if integer, boolean or string.

ERROR 1213 (40001): Deadlock found when trying to get lock; try restarting transaction

Below you can find the steps how to reproduce this. I also tried that on a MariaDB server without Galera and there it was executed without any errors:

Query OK, 0 rows affected (0.01 sec)

Rows matched: 1 Changed: 0 Warnings: 0

I've already posted this inside the Galera bug list and received the following answer:

Can't be reproduced with the reference Codership binaries. This must be a MariaDB-specific bug and should be filed with them.

Used systems:

• CentOS 6.3 x64
  • MariaDB-Galera-server-5.5.35-1.el6.x86_64
  • galera-25.3.2-1.rhel6.x86_64
• CentOS 6.3 x64
  • MariaDB-Galera-server-5.5.36-1.el6.x86_64
  • galera-25.3.2-1.rhel6.x86_64
• CentOS 6.5 x64
  • MariaDB-server-5.5.36-1.el6.x86_64
  • no Galera packages installed (the case where no error occurred)

Edit: This bug seems to be already fixed in MariaDB version 10.

Successfully tested with:
- CentOS 6.3 x64
- MariaDB-Galera-server-10.0.7-1.x86_64
- galera-25.3.2-1.rhel6.x86_64

How to reproduce:

CREATE DATABASE mytest;

USE mytest;

CREATE TABLE mytable (

    id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,

    myint INT DEFAULT 0,

    mybool BOOL DEFAULT 0,

    mystr VARCHAR(100) DEFAULT ""

);

INSERT INTO `mytest`.`mytable` (`myint`, `mystr`) VALUES ('0', 'test');

UPDATE mytable SET myint = 0 WHERE id = 1;

UPDATE mytable SET mybool = 0 WHERE id = 1;

UPDATE mytable SET mystr = "test" WHERE id = 1;