The new build farm was already detecting compiler warnings but didn't do anything about them - until now. If a devel job (same for PR jobs which only have a different trigger mechanism) has compiler warnings the job will become unstable. This also results in a notification being sent to the maintainers, the same as if a job fails.

Since we don't want to change the behavior of the numerous devel jobs of already released distributions this has only been enabled for Kinetic. Of the 154 existing devel jobs in Kinetic only 18 have compiler warnings but are "green" otherwise. We think it is reasonable for the maintainers to address those.

If it happens to be a repository you maintain you might have already or will in the near future receive an email from Jenkins about this. Please consider taking the short amount of time to address the compiler warning in your code. The greater benefit is that all the other packages will benefit from this stricter check and can get notified properly when a regression indicated by a compiler warning happens.

Thank you,

- Dirk