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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1543367

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1543367

Title:
  nested unprileged container fails to start at mounting /proc

Status in linux package in Ubuntu:
  Incomplete
Status in lxc package in Ubuntu:
  Triaged

Bug description:
  Create a trusty or xenial host.  Probably use ubuntu-lxc/daily ppa to
  work around other bugs.

  Create a privileged container (again either trusty or xenial will do),
  and install ubuntu-lxc/daily ppa there.

  Create an unprivileged container in that container.  It will fail at
  mounting proc using safe_mount.  At this point it is mounting proc
  onto /proc/self/fd/14 flags 14.

        lxc-start 20160208234209.189 ERROR    lxc_utils -
  utils.c:safe_mount:1695 - Operation not permitted - Failed to mount
  proc onto /usr/lib/x86_64-linux-gnu/lxc/proc

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