[ros-release] Most of previous pre-release tests have failed

Happy Friday ROS-Release,

I'm afraid I've not yet gotten the idea of ROS pre-release. One thing
is, what does the failure of the majority of previous prerelease tests
mean?
http://jenkins.ros.org/view/Prerelease/
Do maintainers fix on their upstrem repositories after getting
pre-release error, and release w/o pre-release?

Thank you,


--
Isaac