nepomukservicestub crashed with SIGSEGV in pthread_cond_wait@@GLIBC_2.3.2()

[Dana]

Crash occured as system was restarting.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: kde-runtime 4:4.8.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-15.24-generic 3.2.5
Uname: Linux 3.2.0-15-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
CrashCounter: 1
Date: Thu Feb 9 15:45:04 2012
Disassembly: => 0x0: Cannot access memory at address 0x0
ExecutablePath: /usr/bin/nepomukservicestub
InstallationMedia: Xubuntu 12.04 "Precise Pangolin" - Alpha amd64 (20111129.1)
ProcCmdline: /usr/bin/nepomukservicestub nepomukfileindexer
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x0: Cannot access memory at address 0x0
 PC (0x00000000) not located in a known VMA region (needed executable region)!
SegvReason: executing NULL VMA
Signal: 11
SourcePackage: kde-runtime
StacktraceTop:
 ?? ()
 QObject::~QObject() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
 QObject::~QObject() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
 _start ()
Title: nepomukservicestub crashed with SIGSEGV in QObject::~QObject()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:166
 wait (time=18446744073709551615, this=0x1495300) at thread/qwaitcondition_unix.cpp:86
 QWaitCondition::wait (this=<optimized out>, mutex=0x14962d8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
 QThread::wait (this=<optimized out>, time=18446744073709551615) at thread/qthread_unix.cpp:651
 Nepomuk::FileIndexer::~FileIndexer (this=0x14623a0, __in_chrg=<optimized out>) at ../../../../nepomuk/services/fileindexer/fileindexer.cpp:106