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Crashes and won't start if autostart file is missing Icon line

  • Tweaks 46.Beta
  • Ubuntu 24.04 LTS

If an autostart file is missing the Icon line, GNOME Tweaks will crash and fail to start with this error:

Traceback (most recent call last):
  File "/usr/bin/gnome-tweaks", line 99, in <module>
    from gtweak.app import GnomeTweaks
  File "/usr/lib/python3/dist-packages/gtweak/app.py", line 13, in <module>
    from gtweak.tweakview import Window
  File "/usr/lib/python3/dist-packages/gtweak/tweakview.py", line 20, in <module>
    from gtweak.tweaks.tweak_group_startup import TWEAK_GROUP as StartupApplicationTweaks
  File "/usr/lib/python3/dist-packages/gtweak/tweaks/tweak_group_startup.py", line 347, in <module>
    TWEAK_GROUP = AutostartTweakGroup()
                  ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/gtweak/tweaks/tweak_group_startup.py", line 243, in __init__
    self._setup_startup_app_row()
  File "/usr/lib/python3/dist-packages/gtweak/tweaks/tweak_group_startup.py", line 269, in _setup_startup_app_row
    app_row = _StartupAppRowTweak(dfile)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/gtweak/tweaks/tweak_group_startup.py", line 191, in __init__
    app_icon = Gtk.Image.new_from_icon_name("image-missing", Gtk.IconSize.LARGE)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: Gtk.Image.new_from_icon_name() takes exactly 1 argument (2 given)

Test Case

Here is a sample file

~/.config/autostart/org.telegram.desktop.desktop

[Desktop Entry]
Type=Application
Name=org.telegram.desktop
Exec=flatpak run --command=telegram-desktop org.telegram.desktop -autostart
X-Flatpak=org.telegram.desktop

Workaround

Add a line like Icon=telegram to that .desktop. It doesn't matter whether the icon name is even provided on your system.

Other Info

This was originally reported at https://launchpad.net/bugs/2056657