Panic while creating an index

./testrunner -i centos_x64--01_01--autofailover_upr.ini get-cbcollect-info=False,get-logs=False,stop-on-failure=False,get-coredumps=False,force_kill_memached=True,verify_unacked_bytes=True -t 2i.indexscans_2i.SecondaryIndexingScanTests.test_multi_create_query_explain_drop_index,groups=simple:equals:no_orderby_groupby:range,dataset=default,use_gsi_for_primary=True,use_gsi_for_secondary=False,nodes_init=3,services_init=n1ql:kv-kv-index

2016-06-23 20:45:49 | INFO | MainProcess | Cluster_Thread | [tuq_helper.run_cbq_query] RUN QUERY CREATE INDEX employeea970d40792a54be294984b56268213cejob_title ON default(job_title) USING VIEW  WITH {'defer_build': False}

2016-06-23 20:45:49 | INFO | MainProcess | Cluster_Thread | [rest_client.query_tool] query params : statement=CREATE+INDEX+employeea970d40792a54be294984b56268213cejob_title+ON+default%28job_title%29+USING+VIEW++WITH+%7B%27defer_build%27%3A+False%7D

2016-06-23 20:45:49 | ERROR | MainProcess | Cluster_Thread | [task.execute] CBQError: host 172.23.106.35: ERROR:{u'status': u'stopped', u'errors': [{u'msg': u'Panic: interface conversion: interface is map[string]interface {}, not string - cause: interface conversion: interface is map[string]interface {}, not string', u'code': 5001}], u'results': [], u'metrics': {u'elapsedTime': u'8.02963ms', u'executionTime': u'7.843874ms', u'resultSize': 0, u'resultCount': 0, u'errorCount': 1}, u'requestID': u'56504bbf-a4e0-4ba0-9ca7-e66fbcb46719', u'signature': None}