[Bug 1854186] Re: "software-properties-gtk crashed with TypeError in new_init(): could not convert value for property `transient_for' from DialogCacheOutdated to GtkWindow" crash happened after I clicked "Reload Cache" upon checking "Software Restricted by copyright" in the Ubuntu Software Menu

[Seija Kijin]

My dpkg and apt history log, in case this should be of use

** Attachment added: "DpkgHistoryLog.txt"
   https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1854186/+attachment/5308216/+files/DpkgHistoryLog.txt

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Title:
  "software-properties-gtk crashed with TypeError in new_init(): could
  not convert value for property `transient_for' from
  DialogCacheOutdated to GtkWindow" crash happened after I clicked
  "Reload Cache" upon checking "Software Restricted by copyright" in the
  Ubuntu Software Menu

Status in software-properties package in Ubuntu:
  New

Bug description:
  Upon attempting to add debug repositories to apt and then opening
  Software Updater, the cache loaded and then I switched to the Ubuntu
  Software Tab. I then clicked the checkmark next to "software
  restricted by copyright or legal issues." I then clicked the Close
  button, and then the reload button.

  The window that shows the reload process became stuck and would not be
  dismissed, softlocking me in the update-manager app and forcing me to
  kill the application.

  Expected Results:
  Software Update applies the changes without issue and then quits, or throws and error if that is not possible and I made a mistake

  Actual Results:
  Software Update manager hangs ans softlocks me into forcing me to kill the process.

  Prior to the issue occurring, I ran "echo -e "deb
  http://ddebs.ubuntu.com $(lsb_release -cs)-updates main restricted
  universe multiverse\ndeb http://ddebs.ubuntu.com $(lsb_release
  -cs)-proposed main restricted universe multiverse" | sudo tee -a
  /etc/apt/sources.list.d/ddebs.list" and then opened Software Update
  manager. I was attempting to follow the steps to debug on this URL:
  https://wiki.ubuntu.com/DebuggingProgramCrash

  However, I skipped the first step in adding the debug repositories and
  added the one in the second step before opening Software & Updates.

  Description:	Ubuntu 19.10
  Release:	19.10

  software-properties-gtk:
    Installed: 0.98.5
    Candidate: 0.98.5
    Version table:
   *** 0.98.5 500
          500 http://us.archive.ubuntu.com/ubuntu eoan/main amd64 Packages
          500 http://us.archive.ubuntu.com/ubuntu eoan/main i386 Packages
          100 /var/lib/dpkg/status

  ProblemType: Crash
  DistroRelease: Ubuntu 19.10
  Package: software-properties-gtk 0.98.5
  ProcVersionSignature: Ubuntu 5.3.0-23.25-generic 5.3.7
  Uname: Linux 5.3.0-23-generic x86_64
  ApportVersion: 2.20.11-0ubuntu8.2
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Nov 27 11:34:09 2019
  ExecutablePath: /usr/bin/software-properties-gtk
  ExecutableTimestamp: 1562940163
  InstallationDate: Installed on 2019-11-20 (6 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  InterpreterPath: /usr/bin/python3.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/software-properties-gtk --open-tab 2 --toplevel 67108867
  ProcCwd: /home/edwin
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   XDG_RUNTIME_DIR=<set>
  Python3Details: /usr/bin/python3.7, Python 3.7.5, python3-minimal, 3.7.5-1
  PythonArgs: ['/usr/bin/software-properties-gtk', '--open-tab', '2', '--toplevel', '67108867']
  PythonDetails: /usr/bin/python2.7, Python 2.7.17rc1, python-minimal, 2.7.17-1
  SourcePackage: software-properties
  Title: software-properties-gtk crashed with TypeError in new_init(): could not convert value for property `transient_for' from DialogCacheOutdated to GtkWindow
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
  mtime.conffile..etc.apport.crashdb.conf: 2019-11-24T17:17:29.098099

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