Alexis noticed that a Petri Dish run will fail if the change owner hasn't
supplied his or her full name in Gerrit's "Contact Information"
settings[1]. This is fixed in Builbot's master branch[2] but not in any of
the official releases.
Until this fix does make it into a release, please make sure to fill in a
name (which doesn't necessarily have to match reality) in Gerrit's settings
so that we can test your changes.
[1]https://code.wireshark.org/review/#/settings/contact
[2]https://github.com/buildbot/buildbot/commit/2748c9b88284e47ab86b003bcc67d1447403814d