It also affected me on Ubuntu 16.04 LTS with /var/lib/lxc mount via bind.
My original setup only had 8GB for /var, so a bind to directory in /home was the custom hack I did to give lxc more space.
$ grep lxc /etc/fstab /home/var/lib/lxc /var/lib/lxc none bind 0 0
Once tested without the bind, the error was gone.
It also affected me on Ubuntu 16.04 LTS with /var/lib/lxc mount via bind.
My original setup only had 8GB for /var, so a bind to directory in /home was the custom hack I did to give lxc more space.
$ grep lxc /etc/fstab
/home/var/lib/lxc /var/lib/lxc none bind 0 0
Once tested without the bind, the error was gone.