update-apt-xapian-index crashed with SystemError in open(): E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_natty_main_binary-i386_Packages, E:The package lists or status file could not be parsed or opened.

[nanog]

Binary package hint: apt-xapian-index

Error after package update.

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: apt-xapian-index 0.41ubuntu5
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic i686
NonfreeKernelModules: wl
Architecture: i386
Date: Tue Mar 29 10:03:03 2011
ExecutablePath: /usr/sbin/update-apt-xapian-index
InterpreterPath: /usr/bin/python2.7
ProcCmdline: /usr/bin/python /usr/sbin/update-apt-xapian-index --update -q
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/sbin/update-apt-xapian-index', '--update', '-q']
SourcePackage: apt-xapian-index
Title: update-apt-xapian-index crashed with SystemError in open(): E:Encountered a section with no Package: header, E:Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_natty_main_binary-i386_Packages, E:The package lists or status file could not be parsed or opened.
UpgradeStatus: Upgraded to natty on 2011-03-19 (10 days ago)
UserGroups:

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #721797, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.