/*! WSREP_DESYNC */ does not work

[philip-galera]

Both MariaDB and Percona documentation have the following:

wsrep_desync

Description: When set to ON (OFF is default), the node will be desynced from the cluster. The same effect can be achieved with a /*! WSREP_DESYNC */ query comment.

However, using /*! WSREP_DESYNC */ produces a syntax error:

mysql> CREATE TABLE t1 (f1 integer) /*! WSREP_DESYNC */;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WSREP_DESYNC */' at line 1

Grepping the mysql-wsrep and mariadb-server codebase reveals no handling for /*! WSREP_DESYNC */