ymnk/jzlib — pull request #11 by kohsuke (2013-11-19 22:22:04+00:00)
Title: improving error diagnosis.

This is done to better understand reported problems such as https://issues.jenkins-ci.org/browse/JENKINS-20618 and https://issues.jenkins-ci.org/browse/JENKINS-20114 where jzlib can be seen mysteriously failing.