Comment 3 for bug 1043018

I see a problem with just lxc-start, too, not lxc-start-ephemeral.
After doing
  sudo lxc-start -n demo_ubuntu_1204
and then in another window
  sudo lxc-console -n demo_centos6-temp-j4G0FcH
once I log in, the guest hangs, and lxc-ls shows

demo_ubuntu_1204 demo_ubuntu_1204-temp-JjkTzkK demo_ubuntu_1204-temp-oMUDGfY
demo_ubuntu_1204-temp-oMUDGfY demo_ubuntu_1204-temp-oMUDGfY

mount on the host shows

/dev/mapper/ubu12test-root on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
cgroup on /sys/fs/cgroup type tmpfs (rw,relatime,mode=755)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,relatime,cpuset)
cgroup on /sys/fs/cgroup/cpu type cgroup (rw,relatime,cpu)
cgroup on /sys/fs/cgroup/cpuacct type cgroup (rw,relatime,cpuacct)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,relatime,memory)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,relatime,devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,relatime,freezer)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,relatime,blkio)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,relatime,perf_event)
/dev/sda1 on /boot type ext2 (rw)
rpc_pipefs on /run/rpc_pipefs type rpc_pipefs (rw)
obnas1a:/vol/homes/dank on /mnt/home/dank type nfs (rw,soft,tcp,rsize=32768,wsize=32768,nfsvers=3,sloppy,addr=10.10.1.201)
none on /tmp/lxc-lp-KsohZOA type tmpfs (rw)
none on /var/lib/lxc/demo_ubuntu_1204-temp-oMUDGfY type overlayfs (rw,upperdir=/tmp/lxc-lp-KsohZOA,lowerdir=/var/lib/lxc/demo_ubuntu_1204)
none on /var/lib/lxc/demo_ubuntu_1204-temp-oMUDGfY/ephemeralbind type tmpfs (rw)

I suppose next I should try this on an account with a local home directory.