ERROR: apport (pid 22114) Thu Jan 16 17:59:59 2014: called for pid 21917, signal 11, core limit 4294967295
ERROR: apport (pid 22114) Thu Jan 16 17:59:59 2014: executable: /usr/bin/Xorg (command line "/usr/bin/X -core :1 -auth /var/run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch")
ERROR: apport (pid 22114) Thu Jan 16 18:00:00 2014: Unhandled exception:
Traceback (most recent call last):
  File "/usr/share/apport/apport", line 373, in <module>
    if is_closing_session(pid, pidstat.st_uid):
  File "/usr/share/apport/apport", line 213, in is_closing_session
    with open('/proc/%s/environ' % pid) as e:
FileNotFoundError: [Errno 2] No such file or directory: '/proc/21917/environ'
ERROR: apport (pid 22114) Thu Jan 16 18:00:00 2014: pid: 22114, uid: 0, gid: 0, euid: 0, egid: 0
ERROR: apport (pid 22114) Thu Jan 16 18:00:00 2014: environment: environ({})
ERROR: apport (pid 23078) Thu Jan 16 18:05:44 2014: called for pid 22863, signal 11, core limit 4294967295
ERROR: apport (pid 23078) Thu Jan 16 18:05:44 2014: executable: /usr/bin/Xorg (command line "/usr/bin/X -core :1 -auth /var/run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch")
ERROR: apport (pid 23078) Thu Jan 16 18:05:44 2014: is_closing_session(): no DBUS_SESSION_BUS_ADDRESS in environment
ERROR: apport (pid 23078) Thu Jan 16 18:05:44 2014: apport: report /var/crash/_usr_bin_Xorg.0.crash already exists and unseen, doing nothing to avoid disk usage DoS