[Bug 2059796] Re: Other Software > Remove button doesn't work

[Nathan Teodosio]

I had killed the authentication agent and forgot to bring it back, so my
last comment conclusion is wrong.

The incorrect behavior does seem to be tied to deb822; for .source files
the exception being suppressed is

--->
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 1158, in on_remove_clicked
    self.backend.RemoveSource(str(source_entry))
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 141, in __call__
    return self._connection.call_blocking(self._named_service,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 634, in call_blocking
    reply_message = self.send_message_with_reply_and_block(
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
dbus.exceptions.DBusException: org.freedesktop.DBus.Python.ValueError: Traceback (most recent call last):
  File "/lib/python3/dist-packages/dbus/service.py", line 712, in _message_cb
    retval = candidate_method(self, *args, **keywords)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/lib/python3/dist-packages/softwareproperties/dbus/SoftwarePropertiesDBus.py", line 285, in RemoveSource
    self.remove_source(_to_unicode(source))
  File "/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 779, in remove_source
    self.remove_source(source, True)
  File "/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 781, in remove_source
    self.remove_source(source, False)
  File "/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 802, in remove_source
    self.sourceslist.list.append(SourceEntry("", file=source.file))
                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/lib/python3/dist-packages/aptsources/sourceslist.py", line 509, in __init__
    raise ValueError("Classic SourceEntry cannot be written to .sources file")
ValueError: Classic SourceEntry cannot be written to .sources file
<---

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https://bugs.launchpad.net/bugs/2059796

Title:
  Other Software > Remove button doesn't work

Status in software-properties package in Ubuntu:
  Triaged

Bug description:
  Test Case
  ---------
  - Add a PPA
  - Open the Software & Updates tab
  - Switch to the Other Software tab
  - Select the PPA line and click Remove
  - After Authentication, nothing happens.

  No error is emitted to the command line. The repo line still shows.
  The repo is still in /etc/apt/sources.list.d/

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: software-properties-gtk 0.99.44
  ProcVersionSignature: Ubuntu 6.8.0-20.20-generic 6.8.1
  Uname: Linux 6.8.0-20-generic x86_64
  NonfreeKernelModules: zfs
  ApportVersion: 2.28.0-0ubuntu1
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Mar 29 12:06:07 2024
  InstallationDate: Installed on 2022-04-06 (723 days ago)
  InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Daily amd64 (20220405)
  PackageArchitecture: all
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  SourcePackage: software-properties
  UpgradeStatus: Upgraded to noble on 2023-12-09 (111 days ago)

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