(gnome-shell:3120): Clutter-CRITICAL **: clutter_layout_manager_get_child_meta: assertion 'CLUTTER_IS_LAYOUT_MANAGER (manager)' failed

[Chris]

See below, what could be causing this periodically to be written over
and over again to my syslog?

https://paste.ubuntu.com/23706474/


-- 
Chris
KeyID 0xE372A7DA98E6705C
31.11972; -97.90167 (Elev. 1092 ft)
09:23:23 up 8 days, 18:29, 1 user, load average: 0.59, 0.39, 0.37
Ubuntu 16.04.1 LTS, kernel 4.4.0-57-generic #78-Ubuntu SMP Fri Dec 9
23:50:32 UTC 2016
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