create table dual - is crashing in maxscale after upgrade

the following SQL

create table DUAL (DUMMY integer not null, primary key (DUMMY)) engine=InnoDB;

is crashing in maxscale 6.4.4. While DUAL is reserved for special purpose (not to be used as user-defined table), the statement returned error in v.2.5, not a crash.

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near
'DUAL (DUMMY integer not null, primary key (DUMMY)) engine=InnoDB' at line 1