Kubuntu 18.04 - minimal install option crashes installer

[Rik Mills]

Running a test with either a modified iso or filesystem.manifest-minimal-removal in a location ubquity can be pointed to.

Result: Installer crashes at the point it is about to remove extra packages.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.3
ProcVersionSignature: Ubuntu 4.15.0-12.13-generic 4.15.7
Uname: Linux 4.15.0-12-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CasperVersion: 1.389
CurrentDesktop: KDE
Date: Sat Mar 17 21:30:18 2018
InstallCmdLine: file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity initrd=/casper/initrd.lz quiet splash --- maybe-ubiquity
LiveMediaBuild: Kubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180317)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

Mar 17 21:29:23 kubuntu /plugininstall.py: Exception during installation:
Mar 17 21:29:23 kubuntu /plugininstall.py: Traceback (most recent call last):
Mar 17 21:29:23 kubuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1729, in <module>
Mar 17 21:29:23 kubuntu /plugininstall.py: install.run()
Mar 17 21:29:23 kubuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 61, in wrapper
Mar 17 21:29:23 kubuntu /plugininstall.py: func(self)
Mar 17 21:29:23 kubuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 238, in run
Mar 17 21:29:23 kubuntu /plugininstall.py: self.remove_extras()
Mar 17 21:29:23 kubuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1447, in remove_extras
Mar 17 21:29:23 kubuntu /plugininstall.py: (regular, recursive) = install_misc.query_recorded_removed()
Mar 17 21:29:23 kubuntu /plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 251, in query_recorded_removed
Mar 17 21:29:23 kubuntu /plugininstall.py: if misc.create_bool(line.split()[1]):
Mar 17 21:29:23 kubuntu /plugininstall.py: IndexError: list index out of range
Mar 17 21:29:23 kubuntu /plugininstall.py:

[Rik Mills (rikmills)]

A test with a daily iso spun by the infra using a filesystem.manifest-minimal-removal fetched to the kubuntu seed seems successful, so the crash looks to be an artefact of trying to simulate a real case by pointing ubiquity at a tester provided file. If this continues to test ok, I'll mark this bug as invalid.