update-apt-xapian-index crashed with OSError in <module>()

Binary package hint: apt-xapian-index

I started synaptic in jaunty without administrative privileges

Traceback (most recent call last):
  File "/usr/sbin/update-apt-xapian-index", line 511, in <module>
    lockfd = os.open(XAPIANDBLOCK, os.O_RDWR | os.O_CREAT)
OSError: [Errno 13] Permission denied: '/var/lib/apt-xapian-index/update-lock'

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/sbin/update-apt-xapian-index
InterpreterPath: /usr/bin/python2.5
Package: apt-xapian-index 0.15
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/sbin/update-apt-xapian-index -q
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_IN
PythonArgs: ['/usr/sbin/update-apt-xapian-index', '-q']
SourcePackage: apt-xapian-index
Title: update-apt-xapian-index crashed with OSError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/sbin/update-apt-xapian-index", line 511, in <module>
     lockfd = os.open(XAPIANDBLOCK, os.O_RDWR | os.O_CREAT)
 OSError: [Errno 13] Permission denied: '/var/lib/apt-xapian-index/update-lock'
Uname: Linux 2.6.28-4-generic i686
UserGroups: adm admin audio boinc cdrom dialout dip floppy fuse lpadmin netdev plugdev pulse-access pulse-rt video