LOCK TABLE on RocksDB table fails with a bogus error message

MariaDB [test]> select @@log_bin, @@binlog_format;

+-----------+-----------------+

| @@log_bin | @@binlog_format |

+-----------+-----------------+

|         1 | ROW             |

+-----------+-----------------+

1 row in set (0.00 sec)

MariaDB [test]> CREATE TABLE t1 (i INT) ENGINE=RocksDB;

Query OK, 0 rows affected (0.08 sec)

MariaDB [test]> LOCK TABLE t1 WRITE;

ERROR 1105 (HY000): Can't execute updates on master with binlog_format != ROW.

--source include/have_log_bin.inc

--source include/have_binlog_format_mixed.inc

INSTALL SONAME 'ha_rocksdb';

CREATE TABLE t1 (i INT) ENGINE=RocksDB;

LOCK TABLE t1 WRITE;

DROP TABLE t1;