The scenario ...
- trying to access data for job https://ci.jenkins-ci.org/job/jenkins_rc_branch/ using the XML API
- note that the latest build #468 is unstable
- the actual query https://ci.jenkins-ci.org/job/jenkins_rc_branch/api/xml?tree=builds[culprits] throws a java.io.IOException: Failed to write culprits which is Caused by: java.lang.RuntimeException: No author in changeset
- note that the JSON API throws the same exception
... see the attached screenshot and stack trace for further information.