[Bug 1294721] [NEW] trusty-desktop-amd64+mac.iso install fails with "ubi-usersetup failed with exit code 2"

[Brad Figg]

Public bug reported:

I'm trying to install the iso created: 19-Mar-2014 07:50.

The target system is a Macbook Air. After filling out the "Who are you?"
dialog I get the error dialog mentioned in the title.

/var/log/syslog:

ubuntu ubiquity: stat: cannot stat 'UUID=43d8bb61-9b36-4202-a4f1-26152cc50470'
ubuntu ubiquity: : No such file or directory
ubuntu ubiquity: /usr/share/ubiquity/user-setup-encrypted-swap: 84: /usr/share/ubiquity/user-setup-encrypted-swap: arithmetic expression: expecting primary: "/1048576"
ubuntu ubiquity: debconffilter_done: ubi-usersetup (current: ubi-usersetup)
ubuntu ubiquity: dbfilter_handle_status: ('ubi-usersetup', 2)

** Affects: ubiquity (Ubuntu)
     Importance: Critical
         Status: New

** Changed in: ubiquity (Ubuntu)
   Importance: Undecided => Critical

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https://bugs.launchpad.net/bugs/1294721

Title:
  trusty-desktop-amd64+mac.iso install fails with "ubi-usersetup failed
  with exit code 2"

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  I'm trying to install the iso created: 19-Mar-2014 07:50.

  The target system is a Macbook Air. After filling out the "Who are
  you?" dialog I get the error dialog mentioned in the title.

  /var/log/syslog:

  ubuntu ubiquity: stat: cannot stat 'UUID=43d8bb61-9b36-4202-a4f1-26152cc50470'
  ubuntu ubiquity: : No such file or directory
  ubuntu ubiquity: /usr/share/ubiquity/user-setup-encrypted-swap: 84: /usr/share/ubiquity/user-setup-encrypted-swap: arithmetic expression: expecting primary: "/1048576"
  ubuntu ubiquity: debconffilter_done: ubi-usersetup (current: ubi-usersetup)
  ubuntu ubiquity: dbfilter_handle_status: ('ubi-usersetup', 2)

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