pycentral crashed with AttributeError in prepare()

[Patrik Schönfeldt]

This happend in Hardy Alpha: I tried to upgrade "onboard" from 0.87 to 0.91 via "apt-get upgrade" (Upgrade-Manager fails with the same problems).
The Terminal Output reads:
"Vorbereiten zum Ersetzen von onboard 0.87 (durch .../archives/onboard_0.91_all.deb) ...
Traceback (most recent call last):
  File "/usr/bin/pycentral", line 1674, in <module>
    main()
  File "/usr/bin/pycentral", line 1668, in main
    rv = action.run(global_options)
  File "/usr/bin/pycentral", line 1169, in run
    pkg.prepare(used_runtimes, old_used_runtimes, old_pkg)
  File "/usr/bin/pycentral", line 793, in prepare
    self.default_runtime.remove_byte_code(removed_fs)
AttributeError: 'NoneType' object has no attribute 'remove_byte_code'
dpkg: Fehler beim Bearbeiten von /var/cache/apt/archives/onboard_0.91_all.deb (--unpack):
 Unterprozess pre-installation script gab den Fehlerwert 1 zurück
Fehler traten auf beim Bearbeiten von:
 /var/cache/apt/archives/onboard_0.91_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)"

ProblemType: Crash
Architecture: i386
Date: Thu Feb 28 14:05:42 2008
DistroRelease: Ubuntu 8.04
ExecutablePath: /usr/bin/pycentral
InterpreterPath: /usr/bin/python2.5
Package: python-central 0.5.60ubuntu4
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/pycentral pkgprepare onboard
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/bin
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/pycentral', 'pkgprepare', 'onboard']
SourcePackage: python-central
Title: pycentral crashed with AttributeError in prepare()
Uname: Linux 2.6.24-10-generic i686
UserGroups: