Application that crashed: akonadi_nepomuk_contact_feeder
Version of the application: 0.1
KDE Version: 4.2.87 (KDE 4.2.87 (KDE 4.3 >= 20090519))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-11-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
every time I log into kde4 akonadi is started, kontact is started (and asks me my kwallet password) and after a while (minutes or some) the crash report appears

 -- Backtrace:
Application: Akonadi Agent (akonadi_nepomuk_contact_feeder), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f1487b26503 in QUrl::isEmpty () from /usr/lib/libQtCore.so.4
#6  0x00007f1486d990a1 in Soprano::Node::Node () from /opt/kde4/lib/libsoprano.so.4
#7  0x00007f14870a2455 in Nepomuk::ResourceData::store () from /opt/kde4/lib/libnepomuk.so.4
#8  0x00007f14870a2e48 in Nepomuk::ResourceData::setProperty () from /opt/kde4/lib/libnepomuk.so.4
#9  0x00000000004675d2 in Nepomuk::Role::addPhoneNumber ()
#10 0x000000000042cec9 in Akonadi::NepomukContactFeeder::updateItem ()
#11 0x00007f1487ebbc35 in Akonadi::AgentBasePrivate::itemChanged () from /opt/kde4/lib/libakonadi-kde.so.4
#12 0x00007f1487eb8da2 in Akonadi::AgentBasePrivate::qt_metacall () from /opt/kde4/lib/libakonadi-kde.so.4
#13 0x00007f1487b861f2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#14 0x00007f1487f225e7 in Akonadi::Monitor::itemChanged () from /opt/kde4/lib/libakonadi-kde.so.4
#15 0x00007f1487f2655f in Akonadi::MonitorPrivate::emitItemNotification () from /opt/kde4/lib/libakonadi-kde.so.4
#16 0x00007f1487f26bf0 in Akonadi::MonitorPrivate::slotItemJobFinished () from /opt/kde4/lib/libakonadi-kde.so.4
#17 0x00007f1487f22686 in Akonadi::Monitor::qt_metacall () from /opt/kde4/lib/libakonadi-kde.so.4
#18 0x00007f1487ed2e4d in Akonadi::ChangeRecorder::qt_metacall () from /opt/kde4/lib/libakonadi-kde.so.4
#19 0x00007f1487b861f2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#20 0x00007f1486983e32 in KJob::result () from /opt/kde4/lib/libkdecore.so.5
#21 0x00007f14869841af in KJob::emitResult () from /opt/kde4/lib/libkdecore.so.5
#22 0x00007f1487f1e5fb in Akonadi::JobPrivate::handleResponse () from /opt/kde4/lib/libakonadi-kde.so.4
#23 0x00007f1487f3f96c in Akonadi::SessionPrivate::dataReceived () from /opt/kde4/lib/libakonadi-kde.so.4
#24 0x00007f1487f406e9 in Akonadi::Session::qt_metacall () from /opt/kde4/lib/libakonadi-kde.so.4
#25 0x00007f1487b861f2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#26 0x00007f1487bbc085 in QIODevice::qt_metacall () from /usr/lib/libQtCore.so.4
#27 0x00007f14841895a5 in QLocalSocket::qt_metacall () from /usr/lib/libQtNetwork.so.4
#28 0x00007f1487b861f2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#29 0x00007f1484183e8f in ?? () from /usr/lib/libQtNetwork.so.4
#30 0x00007f1484172b61 in ?? () from /usr/lib/libQtNetwork.so.4
#31 0x00007f148538378d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#32 0x00007f148538b97a in QApplication::notify () from /usr/lib/libQtGui.so.4
#33 0x00007f148626801b in KApplication::notify () from /opt/kde4/lib/libkdeui.so.5
#34 0x00007f1487b7075c in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#35 0x00007f1487b9a0e9 in ?? () from /usr/lib/libQtCore.so.4
#36 0x00007f1482cb220a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#37 0x00007f1482cb58e0 in ?? () from /usr/lib/libglib-2.0.so.0
#38 0x00007f1482cb5a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#39 0x00007f1487b99e6f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#40 0x00007f148541bbef in ?? () from /usr/lib/libQtGui.so.4
#41 0x00007f1487b6f002 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#42 0x00007f1487b6f3cd in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#43 0x00007f1487b71694 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#44 0x00007f1487eb9306 in Akonadi::AgentBase::init () from /opt/kde4/lib/libakonadi-kde.so.4
#45 0x000000000042a228 in main ()

Reported using DrKonqi