[Bug 1847228] [NEW] Installer crashes at partitioning stage

[Kishore]

Public bug reported:

When i chose to "Manual" mode and click "Next", i get an installer
crashed with the following log.

Traceback (most recent call last):
  File "/usr/lib/ubiquity/ubiquity/frontend/kde_ui.py", line 1078, in on_next_clicked
    self.dbfilter.ok_handler()
  File "/usr/lib/ubiquity/plugins/ubi-partman.py", line 3262, in ok_handler
    if self.ui.use_zfs.get_active() and method == 'use_device':
AttributeError: 'PageKde' object has no attribute 'use_zfs'

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: ubiquity 19.10.15 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 5.3.0-13.14-generic 5.3.0
Uname: Linux 5.3.0-13-generic x86_64
ApportVersion: 2.20.11-0ubuntu7
Architecture: amd64
CurrentDesktop: KDE
Date: Tue Oct  8 10:33:01 2019
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/kubuntu.seed only-ubiquity quiet splash oem-config/enable=true ---
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug eoan kubuntu ubiquity-19.10.15

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https://bugs.launchpad.net/bugs/1847228

Title:
  Installer crashes at partitioning stage

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