[Bug 1964839] [NEW] software-properties-gtk crashes if APT::Periodic::Upgrade-Package-Lists="3"

[Wes Waugh]

Public bug reported:

Changing `APT::Periodic::Update-Package-Lists` to a value not in the
data model `model_updates_interval` in `/usr/share/software-
properties/gtkbuilder/main.ui` calls an invalid method, crashing the
program.

```
$ cat /etc/apt/apt.conf.d/10periodic
APT::Periodic::Update-Package-Lists "3";
APT::Periodic::Download-Upgradeable-Packages "1";
APT::Periodic::AutocleanInterval "0";
APT::Periodic::Unattended-Upgrade "0";
$ software-properties-gtk
Traceback (most recent call last):
  File "/usr/bin/software-properties-gtk", line 100, in <module>
    app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 231, in __init__
    self.init_auto_update()
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 310, in init_auto_update
    self.combobox_update_interval.append_text(_("Every %s days")
AttributeError: 'ComboBox' object has no attribute 'append_text'
```

Occurs in:
```
$ lsb_release -rd
Description:	Ubuntu 21.04
Release:	21.04
$ apt-cache policy software-properties-gtk
software-properties-gtk:
  Installed: 0.99.10.2
  Candidate: 0.99.10.2
  Version table:
 *** 0.99.10.2 500
        500 http://us.archive.ubuntu.com/ubuntu hirsute-updates/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu hirsute-updates/main i386 Packages
        100 /var/lib/dpkg/status
     0.99.10 500
        500 http://us.archive.ubuntu.com/ubuntu hirsute/main amd64 Packages
        500 http://us.archive.ubuntu.com/ubuntu hirsute/main i386 Packages

** Affects: software-properties (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to software-properties in Ubuntu.
https://bugs.launchpad.net/bugs/1964839

Title:
  software-properties-gtk crashes if APT::Periodic::Upgrade-Package-
  Lists="3"

Status in software-properties package in Ubuntu:
  New

Bug description:
  Changing `APT::Periodic::Update-Package-Lists` to a value not in the
  data model `model_updates_interval` in `/usr/share/software-
  properties/gtkbuilder/main.ui` calls an invalid method, crashing the
  program.

  ```
  $ cat /etc/apt/apt.conf.d/10periodic
  APT::Periodic::Update-Package-Lists "3";
  APT::Periodic::Download-Upgradeable-Packages "1";
  APT::Periodic::AutocleanInterval "0";
  APT::Periodic::Unattended-Upgrade "0";
  $ software-properties-gtk
  Traceback (most recent call last):
    File "/usr/bin/software-properties-gtk", line 100, in <module>
      app = SoftwarePropertiesGtk(datadir=options.data_dir, options=options, file=file)
    File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 231, in __init__
      self.init_auto_update()
    File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 310, in init_auto_update
      self.combobox_update_interval.append_text(_("Every %s days")
  AttributeError: 'ComboBox' object has no attribute 'append_text'
  ```

  Occurs in:
  ```
  $ lsb_release -rd
  Description:	Ubuntu 21.04
  Release:	21.04
  $ apt-cache policy software-properties-gtk
  software-properties-gtk:
    Installed: 0.99.10.2
    Candidate: 0.99.10.2
    Version table:
   *** 0.99.10.2 500
          500 http://us.archive.ubuntu.com/ubuntu hirsute-updates/main amd64 Packages
          500 http://us.archive.ubuntu.com/ubuntu hirsute-updates/main i386 Packages
          100 /var/lib/dpkg/status
       0.99.10 500
          500 http://us.archive.ubuntu.com/ubuntu hirsute/main amd64 Packages
          500 http://us.archive.ubuntu.com/ubuntu hirsute/main i386 Packages

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1964839/+subscriptions