ERROR: apport (pid 8597) Sun Dec 18 13:02:07 2016: called for pid 1656, signal 5, core limit 0
ERROR: apport (pid 8597) Sun Dec 18 13:02:07 2016: executable: /usr/bin/gnome-shell (command line "/usr/bin/gnome-shell")
ERROR: apport (pid 8597) Sun Dec 18 13:02:07 2016: gdbus call error: Error connecting: Could not connect: Connection refused

ERROR: apport (pid 8597) Sun Dec 18 13:02:07 2016: debug: session gdbus call: 
ERROR: apport (pid 8597) Sun Dec 18 13:02:35 2016: wrote report /var/crash/_usr_bin_gnome-shell.121.crash
ERROR: apport (pid 1244) Sun Dec 18 13:04:02 2016: another apport instance is already running, aborting
ERROR: apport (pid 1282) Sun Dec 18 13:04:03 2016: another apport instance is already running, aborting
ERROR: apport (pid 1283) Sun Dec 18 13:04:03 2016: another apport instance is already running, aborting
ERROR: apport (pid 1243) Sun Dec 18 13:04:02 2016: called for pid 1228, signal 6, core limit 18446744073709551615
ERROR: apport (pid 1243) Sun Dec 18 13:04:02 2016: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 1243) Sun Dec 18 13:04:02 2016: executable: /usr/sbin/smbd (command line "/usr/sbin/smbd")
ERROR: apport (pid 1243) Sun Dec 18 13:04:02 2016: is_closing_session(): no DBUS_SESSION_BUS_ADDRESS in environment
ERROR: apport (pid 1243) Sun Dec 18 13:04:05 2016: wrote report /var/crash/_usr_sbin_smbd.0.crash
ERROR: apport (pid 1538) Sun Dec 18 13:04:08 2016: called for pid 1216, signal 6, core limit 18446744073709551615
ERROR: apport (pid 1538) Sun Dec 18 13:04:08 2016: ignoring implausibly big core limit, treating as unlimited
ERROR: apport (pid 1538) Sun Dec 18 13:04:08 2016: executable: /usr/sbin/nmbd (command line "/usr/sbin/nmbd")
ERROR: apport (pid 1538) Sun Dec 18 13:04:08 2016: is_closing_session(): no DBUS_SESSION_BUS_ADDRESS in environment
ERROR: apport (pid 1538) Sun Dec 18 13:04:09 2016: wrote report /var/crash/_usr_sbin_nmbd.0.crash