[Bug 1500110] Re: mount point /tmp/tmp.${RANDOM}/var does not exist

[TJ]

On 14.04 I re-ran ubiquity in --debug mode.

The process stalled with 100% CPU use at around 02:55. I suspect the
causeis the non-zero return code from partman-commit:

debconf (developer): --> 1 Installing system
Sep 27 02:55:31 debconf (filter): --> 0 OK
Sep 27 02:55:31 debconf (filter): <-- PROGRESS INFO ubiquity/install/apt_clone_save
Sep 27 02:55:31 debconf (filter): widget found for ubiquity/install/title
debconf (developer): <-- METAGET ubiquity/install/apt_clone_save description
debconf (developer): --> 1 Saving installed packages...
Sep 27 02:55:31 debconf (filter): --> 0 OK
Sep 27 02:55:31 ubiquity: ['log-output', '-t', 'ubiquity', '--pass-stdout', '/bin/partman-commit'] exited with code 32

** Attachment added: "14.04 ubiquity --debug"
   https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1500110/+attachment/4476039/+files/debug.gz

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Title:
  mount point /tmp/tmp.${RANDOM}/var does not exist

Status in ubiquity package in Ubuntu:
  New

Bug description:
  ubiquity 2.21.31

  mount point /tmp/tmp.${RANDOM}/var does not exist

  Running the manual partitioner on 15.10 kubuntu desktop amd64 for
  2015-09-24 this error shows up in the syslog after assigning existing
  (empty) ext4 LVs for root-fs /home /var /usr/local (no swap assigned)
  and /dev/mapper/LUKS_BOOT for /boot (LUKS /dev/sdc4).

  The ubiquity process then spins at close to 100% of 1 CPU, shows
  "Saving installed packages... 0%", slide-show continues but
  /var/log/syslog doesn't show any progress.

  ubiquity 2.18.8.9 on 14.04 is also affected in an identical way.

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