[Bug 1312673] Re: software-properties-gtk crashed with aptsources.distro.NoDistroTemplateException in get_sources(): Error: could not find a distribution template for Ubuntu/utopic

[dino99]

Get that issue after having changing "trusty" to "utopic" inside /etc/apt/sources.list
In factthat trouble is often met with a new release cycle : 

/usr/share/python-apt/templates/Ubuntu.info

is simply not aware of "utopic"; Ubuntu.info needs to be upgraded with
the whole "utopic" blocks, after the "devel" blocks and before the
"trusty" blocks.

So that also means that "devel" ignore "utopic" right now. As a result,
synaptic -> repositories cant be opened to set our preferences. Changing
"utopic" by "devel" inside sources.list does not allow synaptic to open
the "repositories" to select what we wanting.

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https://bugs.launchpad.net/bugs/1312673

Title:
  software-properties-gtk crashed with
  aptsources.distro.NoDistroTemplateException in get_sources(): Error:
  could not find a distribution template for Ubuntu/utopic

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

Bug description:
  lsb_release -rd
  Description:    Ubuntu Utopic Unicorn (development branch)
  Release:        14.10

  
  apt-cache policy software-properties-gtk 
  software-properties-gtk:
    Installed: 0.92.37
    Candidate: 0.92.37
    Version table:
   *** 0.92.37 0
          500 http://archive.ubuntu.com/ubuntu/ trusty-proposed/main amd64 Packages
          100 /var/lib/dpkg/status
       0.92.36 0
          500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

  ProblemType: Crash
  DistroRelease: Ubuntu 14.10
  Package: software-properties-gtk 0.92.37
  Uname: Linux 3.14.0-999-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  Date: Fri Apr 25 19:27:37 2014
  ExecutablePath: /usr/bin/software-properties-gtk
  InstallationDate: Installed on 2012-09-30 (572 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120817.1)
  InterpreterPath: /usr/bin/python3.4
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/software-properties-gtk --open-tab 2 --toplevel 62914567
  PythonArgs: ['/usr/bin/software-properties-gtk', '--open-tab', '2', '--toplevel', '62914567']
  SourcePackage: software-properties
  Title: software-properties-gtk crashed with aptsources.distro.NoDistroTemplateException in get_sources(): Error: could not find a distribution template for Ubuntu/utopic
  UpgradeStatus: Upgraded to utopic on 2013-11-10 (165 days ago)
  UserGroups:

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