Exec_master_log_pos not updated at log rotate in parallel replication

--let $rpl_topology=1->2

--source include/rpl_init.inc

--connection server_2

SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;

--source include/stop_slave.inc

SET GLOBAL slave_parallel_threads=1;

--source include/start_slave.inc

--connection server_1

CREATE TABLE t1 (a INT PRIMARY KEY, b INT);

INSERT INTO t1 VALUES (1,1);

INSERT INTO t1 VALUES (2,2), (3,8);

INSERT INTO t1 VALUES (4,16);

--save_master_pos

--connection server_2

--sync_with_master

--let $status_items= Master_Log_File,Read_Master_Log_Pos,Relay_Log_File,Relay_Log_Pos,Relay_Master_Log_File,Exec_Master_Log_Pos

--source include/show_slave_status.inc

--connection server_1

FLUSH LOGS;

--save_master_pos

--connection server_2

--sync_with_master

# exec_master_log_pos is not updated here by the format description event execution

--source include/show_slave_status.inc

--connection server_1

UPDATE t1 SET b=b*b;

--save_master_pos

--connection server_2

--sync_with_master

# it's not even updated with the UPDATE statement.

--source include/show_slave_status.inc

--connection server_2

--source include/stop_slave.inc

SET GLOBAL slave_parallel_threads=@old_parallel_threads;

--source include/start_slave.inc

--connection server_1

DROP TABLE t1;

--source include/rpl_end.inc