[Bug 1876509] [NEW] Two physical drives for encryption crashes installer

[Salvin Marvin]

Public bug reported:

While running the installer from the live disk, I am trying to add
physical encrypted volumes on two separate drives. As soon as I select
set the second drive to a physical encrypted volume, the installer
crashes. Here is the traceback:

Traceback (most recent call last):
  File "/usr/lib/ubiquity/ubiquity/frontend/kde_components/PartMan.py", line 453, in on_edit_clicked
    self.partman_edit_dialog(devpart, partition)
  File "/usr/lib/ubiquity/ubiquity/frontend/kde_components/PartMan.py", line 367, in partman_edit_dialog
    self.ctrlr.dbfilter.edit_partition(devpart, **edits)
  File "/usr/lib/ubiquity/plugins/ubi-partman.py", line 3428, in edit_partition
    assert self.current_question == 'partman/choose_partition'
AssertionError

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckMismatches: ./pool/restricted/n/nvidia-graphics-drivers-435/libnvidia-encode-435_435.21-0ubuntu7_amd64.deb
CasperMD5CheckResult: skip
CasperVersion: 1.445
CurrentDesktop: KDE
Date: Sat May  2 18:51:46 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/kubuntu.seed maybe-ubiquity quiet splash nomodeset ---
LiveMediaBuild: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal kubuntu ubiquity-20.04.15

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https://bugs.launchpad.net/bugs/1876509

Title:
  Two physical drives for encryption crashes installer

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