ps 5.6 Can not create a clustering index on a partitioned tokudb table

mysql> CREATE TABLE `t1` ( -> `a` int(10) unsigned NOT NULL AUTO_INCREMENT,
-> `b` varchar(255) DEFAULT NULL,
-> PRIMARY KEY (`a`)
-> ) ENGINE=TokuDB DEFAULT CHARSET=latin1
-> /*!50100 PARTITION BY RANGE (a)
-> (PARTITION p0 VALUES LESS THAN (100) ENGINE = TokuDB,
-> PARTITION p2 VALUES LESS THAN MAXVALUE ENGINE = TokuDB) */;
Query OK, 0 rows affected (0.23 sec)

mysql> alter table t1 add clustering index cl_b (`b`);
ERROR 1478 (HY000): Table storage engine 'partition' does not support the create option 'CLUSTERING'

Bugs is here:
(gdb) bt
#0 mysql_prepare_create_table (thd=0x183e1290, create_info=0x7ffda427d430, alter_info=0x7ffda427d370, tmp_table=true, db_options=0x7ffda427ac70, file=0x7ffd54006358, key_info_buffer=0x7ffda427bbf8, key_\
count=0x7ffda427bbcc, select_field_count=0) at /home/rfp/ps5620/percona-server-5.6/sql/sql_table.cc:3785
#1 0x000000000083b71f in create_table_impl (thd=0x183e1290, db=0x7ffd540052a0 "test", table_name=0x7ffda427c840 "#sql-6ce3_2", path=0x7ffda427d0ac "./test/#sql-6ce3_2", create_info=0x7ffda427d430, alter\
_info=0x7ffda427d370, internal_tmp_table=true, select_field_count=0, no_ha_table=true, is_trans=0x0, key_info=0x7ffda427bbf8, key_count=0x7ffda427bbcc) at /home/rfp/ps5620/percona-server-5.6/sql/sql_tabl\
e.cc:4737
#2 0x00000000008444ea in mysql_alter_table (thd=0x183e1290, new_db=0x7ffd540052a0 "test", new_name=0x0, create_info=0x7ffda427d430, table_list=0x7ffd54004d40, alter_info=0x7ffda427d370, order_num=0, ord\
er=0x0, ignore=false) at /home/rfp/ps5620/percona-server-5.6/sql/sql_table.cc:8426
#3 0x0000000000989799 in Sql_cmd_alter_table::execute (this=0x7ffd54005368, thd=0x183e1290) at /home/rfp/ps5620/percona-server-5.6/sql/sql_alter.cc:317
#4 0x00000000007d18d1 in mysql_execute_command (thd=0x183e1290) at /home/rfp/ps5620/percona-server-5.6/sql/sql_parse.cc:5384
#5 0x00000000007d4b4d in mysql_parse (thd=0x183e1290, rawbuf=0x7ffd54004c30 "alter table t1 add clustering index cl_b (`b`)", length=46, parser_state=0x7ffda427f1d0) at /home/rfp/ps5620/percona-server-5\
.6/sql/sql_parse.cc:6746
#6 0x00000000007c72e8 in dispatch_command (command=COM_QUERY, thd=0x183e1290, packet=0x183e53e1 "alter table t1 add clustering index cl_b (`b`)", packet_length=46) at /home/rfp/ps5620/percona-server-5.6\
/sql/sql_parse.cc:1434

Partition storage engine needs to pass up the clustering flag from the underlying engine.