nepomukserver crashed with SIGSEGV in testAndSetOrdered()

[anagor]

Showed this crash information on the next login after a recent system update that required reboot.
The file indexer seems to function and the search working however.

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: nepomuk-core 4:4.9.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-15.23-generic 3.5.4
Uname: Linux 3.5.0-15-generic x86_64
ApportVersion: 2.5.2-0ubuntu4
Architecture: amd64
Date: Tue Sep 25 04:36:52 2012
ExecutablePath: /usr/bin/nepomukserver
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120423)
ProcCmdline: /usr/bin/nepomukserver
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f2edc682e04 <QProcess::state() const+4>: mov 0xf4(%rax),%eax
 PC (0x7f2edc682e04) ok
 source "0xf4(%rax)" (0x000000f4) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: nepomuk-core
StacktraceTop:
 testAndSetOrdered (newValue=0, expectedValue=1, this=0xf28960) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:145
 testAndSetRelease (newValue=0, this=0xf28960, expectedValue=1) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:272
 unlockInline (this=0xf28bb0) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:171
 QObject::~QObject (this=0xf27630, __in_chrg=<optimized out>) at kernel/qobject.cpp:922
 ?? () from /usr/lib/kde4/libkdeinit/libkdeinit4_nepomukserver.so
Title: nepomukserver crashed with SIGSEGV in testAndSetOrdered()
UpgradeStatus: Upgraded to quantal on 2012-09-23 (1 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo www-data

[Apport retracing service (apport)]

StacktraceTop:
 testAndSetOrdered (newValue=0, expectedValue=1, this=0xf28960) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:145
 testAndSetRelease (newValue=0, this=0xf28960, expectedValue=1) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:272
 unlockInline (this=0xf28bb0) at ../../include/QtCore/../../src/corelib/thread/qmutex.h:171
 QObject::~QObject (this=0xf27630, __in_chrg=<optimized out>) at kernel/qobject.cpp:922
 Nepomuk2::ServiceController::~ServiceController (this=0xf27630, __in_chrg=<optimized out>) at ../../server/servicecontroller.cpp:155

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.