crashes on live image with NoDistroTemplateException

[Carla Sella]

Botting in live session, if you press super key, enter "software & updates" and click on the "software & updates" icon to open. software-properties-gtk , it does not open, nothing happens.
If you open "software center" and select "software sources" form the edit menu software-properties-gtk does not open, nothing happens.
If you type software-properties-gtk in terminal you get this output:

Traceback (most recent call last):
  File "/usr/bin/software-properties-gtk", line 101, in <module>
    app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 98, in __init__
    SoftwareProperties.__init__(self, options=options, datadir=datadir)
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 109, in __init__
    self.reload_sourceslist()
  File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 599, in reload_sourceslist
    self.distro.get_sources(self.sourceslist)
  File "/usr/lib/python3/dist-packages/aptsources/distro.py", line 89, in get_sources
    (self.id, self.codename))
aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for Ubuntu/trusty

This is happening on a Trusty live, got the ISO from: http://cdimage.ubuntu.com/daily-live/current/trusty-desktop-amd64.iso (today is 10/31/2013).

On a Trusty desktop this does not occur.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: software-properties-gtk 0.92.27
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
ApportVersion: 2.12.5-0ubuntu2
Architecture: amd64
CasperVersion: 1.336ubuntu1
Date: Thu Oct 31 21:46:01 2013
LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20131021.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: software-properties
UpgradeStatus: No upgrade log present (probably fresh install)

[Carla Sella (carla-sella)]

I zsync-ed today's image (11012013) and the issue does not occur anymore, software-properties opens correctly.
I am marking this bug invalid.

[Carla Sella (carla-sella)]

Not sure this bug should be marked invalid of fix commited.

[Brian Murray (brian-murray)]

This was a bug with the new distribution not being added to python-apt yet, rather than looking for that bug (to make this a duplicate of) I'm just to mark this as Invalid.