I quickliky looked at logs it seems this is the [first failure point](https://travis-ci.org/apache/incubator-superset/jobs/427447374) for PR #5859
However i trust the actual issue must be older than this as #5859 is harmless [ Full content available at: https://github.com/apache/incubator-superset/pull/5991 ] This message was relayed via gitbox.apache.org for devnull@infra.apache.org
