[Bug 1783033] Re: Ubiquity Disk Setup crashes (AssertionError) on "Undo all changes"

[Simon Quigley]

** Changed in: ubiquity (Ubuntu)
       Status: New => Won't Fix

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Title:
  Ubiquity Disk Setup crashes (AssertionError) on "Undo all changes"

Status in ubiquity package in Ubuntu:
  Won't Fix

Bug description:
  I'm running Kubuntu 18.04 from USB, trying to install into a GPT HDD.

  - Navigate Ubuntu installer until you reach Disk Setup
  - Create Partition sda6, Use as: "physical volume for encryption"
      - I can't find how to create any partitions within the encrypted partition.
  - Undo all changes

  Traceback (most recent call last):
    File "/usr/lib/ubiquity/ubiquity/frontend/kde_components/PartMan.py", line 468, in on_undo_clicked
      self.ctrlr.dbfilter.undo()
    File "/usr/lib/ubiquity/plugins/ubi-partman.py", line 3305, in undo
      assert self.current_question == 'partman/choose_partition'
  AssertionError

  I get the feeling you tried to switch self.current_question to "create
  partitions within encrypted volume", but the wizard was still showing
  the partitioning screen.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubiquity 18.04.14
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CasperVersion: 1.394
  CurrentDesktop: KDE
  Date: Mon Jul 23 01:14:00 2018
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity quiet splash ---
  LiveMediaBuild: Kubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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