nepomukservicestub crashed with SIGSEGV in __kernel_vsyscall()

Crashed on guest system.

Guest:
Ubuntu 12.04 alpha 1

Host:
Ubuntu 11.10
Virtualbox 4.1.6

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: kde-runtime 4:4.7.3-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-2.6-generic 3.2.0-rc3
Uname: Linux 3.2.0-2-generic i686
ApportVersion: 1.90-0ubuntu1
Architecture: i386
Date: Sat Dec 3 20:08:17 2011
Disassembly: => 0x0: Cannot access memory at address 0x0
ExecutablePath: /usr/bin/nepomukservicestub
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20111129.1)
ProcCmdline: /usr/bin/nepomukservicestub nepomukstorage
ProcEnviron:
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
 LANGUAGE=
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/i386-linux-gnu/libQtCore.so.4
 QObject::~QObject() () from /usr/lib/i386-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