Distribution option in "Other Software" tab is not editable

[Sergio Benjamim]

Try to modify Distribution option in "Other Software" tab in software-properties is no possible. Steps:

1. add a PPA
2. open software-properties-gtk (in terminal) and go to "Other Software" tab
3. click in Edit button, and try to modify Distribution option from trusty to saucy, for example, and OK
4. the Distribution option continues in "trusty"
5. click in Edit button again, try to modify again and press OK, the "Edit Source" window will not close (now OK and Cancel button will not work), and you will get this error in terminal:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 891, in on_edit_clicked
    if dialog.run() == Gtk.ResponseType.OK:
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/DialogEdit.py", line 123, in run
    index = self.sourceslist.list.index(self.source_entry)
ValueError: <aptsources.sourceslist.SourceEntry object at 0x7f5a660b6750> is not in list

Or this:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 891, in on_edit_clicked
    if dialog.run() == Gtk.ResponseType.OK:
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/DialogEdit.py", line 123, in run
    index = self.sourceslist.list.index(self.source_entry)
ValueError: <aptsources.sourceslist.SourceEntry object at 0x7f63869f3750> is not in list

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: software-properties-gtk 0.92.29
ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4
Uname: Linux 3.12.0-7-generic x86_64
ApportVersion: 2.12.7-0ubuntu2
Architecture: amd64
CasperVersion: 1.336ubuntu1
Date: Sun Dec 15 14:59:52 2013
LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131215)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: software-properties
UpgradeStatus: No upgrade log present (probably fresh install)

[Brian Murray (brian-murray)]

I was unable to recreate using Ubuntu 13.10 and the instructions provided.

[Brian Murray (brian-murray)]

I also tried with Trusty and could not recreate it. Could you review the instructions and ensure that they are correct? Thanks in advance.

[Sergio Benjamim (sergio-br2)]

Using daily build of 2013/12/18, I could not recreate too. It seems it is fixed...