5ac379ca64
One of our production Gerrit instances is seeing null UUIDs in the group backend code, leading to NPEs from the IncludingGroupMembership code paths. We presently have no idea how the null UUID is being added into the group collection. Guard the internal group listing for an AccountState to avoid groups that are missing a UUID. Also ensure the queue does not get initialized with a null entry, and never add a null UUID during iteration. This should stop the NPE we are seeing in our logs, but is probably only a bandaid over the real source of the null. Change-Id: I61543cbf71f62aa42d1188818e1296020497e4a3