[Bug 1990196] Re: oem-config-kde crashes when buttons clicked

[Michael Mikowski]

Olivier, your patch is now tested and in-use. I removed the exception
trap from on_next_clicked to avoid any potential side effects. In the
abundance of caution, I diffed file systems again, and there were no
significant changes between the regular install and the installer with
the patch. I hope that is useful.  The diff was very similar to above.
If you want a copy, let me know.

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https://bugs.launchpad.net/bugs/1990196

Title:
  oem-config-kde crashes when buttons clicked

Status in ubiquity package in Ubuntu:
  In Progress
Status in ubiquity source package in Jammy:
  Confirmed
Status in ubiquity source package in Kinetic:
  Confirmed
Status in ubiquity source package in Lunar:
  In Progress

Bug description:
  During oem-config-kde mode, after user information has been entered,
  oem-config-kde keeps the "Back" and "Continue" buttons when these
  shouldn't appear at this stage. If these are clicked, the installer
  will crash, this is 100% reproducible:

  Traceback (most recent call last):
   File" /usr/lib/ubiquity/ubiquity/frontend/kde_ui.py", line 1073, in on_next_clicked
    ui = self.pages[self.pagesindex].ui
  IndexError:list index out of range

  This is very bad from a user experience point of view as this can make
  the system unrecoverable without a complete reinstall, depending on
  where in the process the installer was when the user clicked on either
  of these buttons.

  This problem exists in both Jammy and Kinetic. See attached
  screenshots and pictures.

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