Might also be related to https://bugs.launchpad.net/ubuntu/zesty/+source/unity8-desktop-session/+bug/1632772 since removing unity8-desktop-session also allowed me to log in using gnome shell. However, I still think it shouldn't have caused a null pointer dereference.
Might also be related to https:/ /bugs.launchpad .net/ubuntu/ zesty/+ source/ unity8- desktop- session/ +bug/1632772 since removing unity8- desktop- session also allowed me to log in using gnome shell. However, I still think it shouldn't have caused a null pointer dereference.