/usr/share/apport/apport-gtk:5:g_thread_new:_g_dbus_shared_thread_ref:_g_dbus_worker_new:initable_init:g_bus_get_sync

The Ubuntu Error Tracker has been receiving reports about a problem regarding apport. This problem was most recently seen with package version 2.20.9-0ubuntu7.6, the problem page at https://errors.ubuntu.com/problem/18c42ea7db98dc871f394d17b00187f7804771e3 contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.