As seen in unit-simple-test: http://cv.jenkins.couchbase.com/job/unit-simple-test/33508/testReport/junit/projectroot.couchdb.src.couch_set_view/test/couchdb_couch_set_view_25_util_stats/
Also seen in 7.0.1-5979 - see http://cv.jenkins.couchbase.com/job/unit-simple-test/33506/
Also seen in 6.6.3-9809 (CentOS 7) - see http://cv.jenkins.couchbase.com/job/unit-simple-test/33754/testReport/junit/projectroot.couchdb.src.couch_set_view/test/couchdb_couch_set_view_25_util_stats/
Also seen in 7.0.1-5979 - see http://cv.jenkins.couchbase.com/job/unit-simple-test/33506/