Public bug reported:

chris@localhost:~$ lsb_release -crid
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.1 LTS
Release:        16.04
Codename:       xenial

chris@localhost:~$ apt-cache policy gnome-shell
gnome-shell:
  Installed: 3.18.5-0ubuntu0.1
  Candidate: 3.18.5-0ubuntu0.1
  Version table:
 *** 3.18.5-0ubuntu0.1 500
        500 http://us.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 
Packages
        100 /var/lib/dpkg/status
     3.18.4-0ubuntu3 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages


Below is one seconds output to the syslog whenever Cairo-Dock is running

chris@localhost:~$ apt-cache policy cairo-dock
cairo-dock:
  Installed: 3.4.1-0ubuntu1
  Candidate: 3.4.1-0ubuntu1
  Version table:
 *** 3.4.1-0ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu xenial/universe i386 Packages
        100 /var/lib/dpkg/status


Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 
'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed
Aug 31 08:47:27 localhost gnome-session[3997]: (gnome-shell:4131): 
GLib-GObject-CRITICAL **: g_object_set: assertion 'G_IS_OBJECT (object)' failed

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1618910

Title:
  (gnome-shell:4131): Clutter-CRITICAL **:
  clutter_layout_manager_get_child_meta: assertion
  'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed

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