[Bug 845669] Re: software-properties-gtk crashed with AttributeError in remove_source(): 'NoneType' object has no attribute 'file'

[Apport retracing service]

*** This bug is a duplicate of bug 820150 ***
    https://bugs.launchpad.net/bugs/820150

Thank you for taking the time to report this crash and helping to make
Ubuntu better.  This particular crash has already been reported and is a
duplicate of bug #820150, so is being marked as such.  Please look at
the other bug report to see if there is any missing information that you
can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** Tags removed: need-duplicate-check

** Attachment removed: "Dependencies.txt"
   https://bugs.launchpad.net/bugs/845669/+attachment/2376638/+files/Dependencies.txt

** Attachment removed: "ProcMaps.txt"
   https://bugs.launchpad.net/bugs/845669/+attachment/2376639/+files/ProcMaps.txt

** Attachment removed: "ProcStatus.txt"
   https://bugs.launchpad.net/bugs/845669/+attachment/2376640/+files/ProcStatus.txt

** This bug has been marked a duplicate of private bug 820150

** Visibility changed to: Public

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https://bugs.launchpad.net/bugs/845669

Title:
  software-properties-gtk crashed with AttributeError in
  remove_source(): 'NoneType' object has no attribute 'file'

Status in “software-properties” package in Ubuntu:
  New

Bug description:
  Sorry but I have no idea what happened, I was just prompted the error.
  I just wanted to notify... :( I'm using 11.10 beta 1

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: software-properties-gtk 0.81.9
  ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4
  Uname: Linux 3.0.0-10-generic i686
  NonfreeKernelModules: nvidia
  ApportVersion: 1.22.1-0ubuntu2
  Architecture: i386
  Date: Fri Sep  9 16:04:17 2011
  ExecutablePath: /usr/bin/software-properties-gtk
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901)
  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python /usr/bin/software-properties-gtk
  ProcEnviron:
   LANGUAGE=es_ES:es_AR:en
   PATH=(custom, no user)
   LANG=es_ES.UTF-8
   LC_MESSAGES=es_ES.UTF-8
   SHELL=/bin/bash
  PythonArgs: ['/usr/bin/software-properties-gtk']
  SourcePackage: software-properties
  Title: software-properties-gtk crashed with AttributeError in remove_source(): 'NoneType' object has no attribute 'file'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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