[Bug 912563] Re: ubiquity crashed with TypeError in partman_column_format: argument of type 'NoneType' is not iterable

[Brian Murray]

Bug 918797 is similar to this one and should probably be a duplicate of
this one.  The reporter in that bug says:

"I choose to install in auto resize, then in the resizing window I-ve
clicked the little red written that redirect to manual partitioning,
then the crash with the installer that still working."

So it seems like going into manual partitioning may cause it.

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https://bugs.launchpad.net/bugs/912563

Title:
  ubiquity crashed with TypeError in partman_column_format: argument of
  type 'NoneType' is not iterable

Status in “ubiquity” package in Ubuntu:
  Confirmed
Status in “ubiquity” source package in Precise:
  Confirmed

Bug description:
  Was trying out Ubuntu Precise daily image from USB stick.
  Had backed out of the install ubuntu path, when I wasn't sure on how it would be impacting the windows partition.  
  Pressing back key triggered this.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: ubiquity 2.9.10
  ProcVersionSignature: Ubuntu 3.2.0-7.13-generic-pae 3.2.0-rc7
  Uname: Linux 3.2.0-7-generic-pae i686
  ApportVersion: 1.90-0ubuntu1
  Architecture: i386
  CasperVersion: 1.296
  Date: Thu Jan  5 21:03:13 2012
  ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
  InterpreterPath: /usr/bin/python2.7
  LiveMediaBuild: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120105)
  ProcCmdline: /usr/bin/python /usr/lib/ubiquity/bin/ubiquity --greeter --only
  ProcEnviron: Error: [Errno 13] Permission denied: '/proc/2892/environ'
  PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', '--greeter', '--only']
  SourcePackage: ubiquity
  Title: ubiquity crashed with AttributeError in _decode_value(): 'NoneType' object has no attribute 'decode'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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