Created attachment 403940 [details] backtrace Crashes at login if Wacom Bamboo tablet is plugged in, results in the "something has gone wrong" dialog.
Reported this upstream at https://bugzilla.gnome.org/show_bug.cgi?id=749844 because I can't figure out what is going on :/
Fixed in overlay git 481235c49f2f6098eedc6af2a8b1acf6153336f4, patch submitted upstream.