Traceback (most recent call last):
  File "/usr/share/gnome-app-install/AppInstall/AppInstallApp.py", line 1040, in on_button_ok_clicked
    self.applyChanges(to_add, to_rm)
  File "/usr/share/gnome-app-install/AppInstall/AppInstallApp.py", line 1017, in applyChanges
    ret = self.install_backend.commit(pkgs_add, pkgs_rm)
  File "/usr/share/gnome-app-install/AppInstall/backend/InstallBackendAptdaemon.py", line 23, in commit
    exit_handler=self._on_exit)
TypeError: commit_packages() got an unexpected keyword argument 'exit_handler'