master crashed when slave specfied a future position with semi-repl plugin

# master:

MariaDB [sbtest]> select version();show master status;

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

| version()           |

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

| 10.0.16-MariaDB-log |

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

1 row in set (0.00 sec)

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

| File                     | Position | Binlog_Do_DB | Binlog_Ignore_DB |

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

| *SVR3327HW5885-bin.000001 |      320 *|              |                  |

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

1 row in set (0.00 sec)

# slave:

change master to master_host='192.168.60.51',master_user='xxxxxxx',master_password='xxxxxxx',master_port=55944,master_log_file='SVR3327HW5885-bin.*000002*',master_log_pos=320;

start slave;

# enter any DML query,then master will crash!

mysqld: /home/op1/mariadb-10.0.16/plugin/semisync/semisync_master.cc:750: int ReplSemiSyncMaster::commitTrx(const char*, my_off_t): Assertion `(thd_kill_statement_service->thd_kill_level_func(__null) == THD_ABORT_ASAP) || !active_tranxs_->is_tranx_end_pos(trx_wait_binlog_name, trx_wait_binlog_pos)' failed.

150215 15:33:24 [ERROR] mysqld got signal 6 ;