GTT: Slave thread-hangs on 'Waiting for table metadata lock' on DROP TABLE

--source include/have_innodb.inc

--source include/have_binlog_format_mixed.inc

--source include/master-slave.inc

CREATE TABLE t (c INT) ENGINE=InnoDB;

CREATE GLOBAL TEMPORARY TABLE gtt (c INT) ENGINE=InnoDB ON COMMIT PRESERVE ROWS;

--source include/sync_slave_sql_with_master.inc

--let $diff_tables= slave:gtt, slave:t

--source include/diff_tables.inc

--connection master

TRUNCATE TABLE gtt;

DROP TABLE t, gtt;

--source include/rpl_end.inc

MariaDB [(none)]> show processlist;

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

| Id | User        | Host            | db   | Command   | Time | State                                                | Info                                                      | Progress |

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

|  5 | root        | localhost:35408 | test | Query     |   13 | Waiting for the slave SQL thread to advance position | select master_pos_wait('master-bin.000001', 844, 300, '') |    0.000 |

|  6 | system user |                 | NULL | Slave_IO  |   13 | Waiting for master to send event                     | NULL                                                      |    0.000 |

|  7 | system user |                 | test | Slave_SQL |   13 | Waiting for table metadata lock                      | DROP TABLE `t`,`gtt` /* generated by server */            |    0.000 |

|  8 | root        | localhost:35418 | test | Sleep     |   13 |                                                      | NULL                                                      |    0.000 |

|  9 | root        | localhost:35430 | test | Sleep     |   13 |                                                      | NULL                                                      |    0.000 |

| 10 | root        | localhost:59268 | NULL | Query     |    0 | starting                                             | show processlist                                          |    0.000 |

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

6 rows in set (0.000 sec)

CREATE TABLE gtt (c INT) ENGINE=InnoDB;