[Bug 1869983] Re: Kubuntu 20.04 ubiquity installer crash

[Rik Mills]

Crashes in code introduced in: https://code.launchpad.net/~ubuntu-
installer/ubiquity/+git/ubiquity/+merge/379899

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Title:
  Kubuntu 20.04 ubiquity installer crash

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Crashed after the Keyboard screen in Ubiquity

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.8
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  ApportVersion: 2.20.11-0ubuntu21
  Architecture: amd64
  CasperVersion: 1.442
  CurrentDesktop: KDE
  Date: Tue Mar 31 23:19:58 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/kubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Kubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200331)
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

  Exception in KDE frontend (invoking crash handler):
  Traceback (most recent call last):
    File "/usr/lib/ubiquity/ubiquity/frontend/kde_ui.py", line 514, in <lambda>
      0, lambda: self.dbfilter.start(auto_process=True))
    File "/usr/lib/ubiquity/ubiquity/filteredcommand.py", line 103, in start
      prep = self.prepare()
    File "/usr/lib/ubiquity/plugins/ubi-prepare.py", line 419, in prepare
      if self.frontend.ubuntu_drivers:
  AttributeError: 'Wizard' object has no attribute 'ubuntu_drivers'

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