update-rc.d crashed with SIGSEGV in readdir64_r()

Binary package hint: sysvinit

Long hang on aptitude purging all xen packages (while running -xen kernel) in Tribe 4.
Killed all xen processes, and this error ensued.

ProblemType: Crash
Architecture: i386
Date: Tue Aug 14 12:45:35 2007
Dependencies:

DistroRelease: Ubuntu 7.10
ExecutablePath: /usr/sbin/update-rc.d
InterpreterPath: /usr/bin/perl
NonfreeKernelModules: apparmor aamatch_pcre
Package: sysv-rc 2.86.ds1-14.1ubuntu27
PackageArchitecture: all
ProcCmdline: /usr/bin/perl /usr/sbin/update-rc.d xend defaults 20 21
ProcCwd: /etc/rc0.d
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/bin
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: sysvinit
Stacktrace:
 #0 0xb7df63f7 in readdir64_r () from /lib/tls/i686/cmov/libc.so.6
 #1 0x080fdca5 in Perl_pp_readdir ()
 #2 0x080c0d29 in Perl_runops_standard ()
 #3 0x0806727a in perl_run ()
 #4 0x08063732 in main ()
StacktraceTop:
 readdir64_r () from /lib/tls/i686/cmov/libc.so.6
 Perl_pp_readdir ()
 Perl_runops_standard ()
 perl_run ()
 main ()
Title: update-rc.d crashed with SIGSEGV in readdir64_r()
Uname: Linux antibes 2.6.22-9-xen #1 SMP Fri Aug 3 02:23:57 GMT 2007 i686 GNU/Linux
UserGroups:
SegvAnalysis:
 Segfault happened at: 0xb7df63f7 <readdir64_r+215>: cmovne %gs:(%edx),%eax
 PC (0xb7df63f7) ok
 source "%gs:(%edx)" (0x0000000f) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA