Application: lancelot (1.9.5)
KDE Platform Version: 4.8.4 (4.8.4) "release 511"
Qt Version: 4.8.2
Operating System: Linux 3.3.6 x86_64
Distribution: "openSUSE 12.1 (x86_64)"

-- Information about the crash:
After updating KDE lancelot keeps on crashing during login-process.
No user action was performed before Lancelot crashed. Restart by console seems to lead to a stable state.

The crash can be reproduced every time.

-- Backtrace:
Application: Lancelot (lancelot), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f1647a047c0 (LWP 3020))]

Thread 2 (Thread 0x7f162bd74700 (LWP 3028)):
#0  0x00007f1643c8a17f in poll () from /lib64/libc.so.6
#1  0x00007f163b4aea98 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f163b4aef59 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f16450e6e36 in QEventDispatcherGlib::processEvents (this=0x7f16240008e0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f16450b6842 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f16450b6a97 in QEventLoop::exec (this=0x7f162bd73cd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f1644fb65f7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f164509662f in QInotifyFileSystemWatcherEngine::run (this=0xbf0160) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f1644fb961b in QThreadPrivate::start (arg=0xbf0160) at thread/qthread_unix.cpp:307
#9  0x00007f16370fab74 in ?? () from /usr/lib64/libGL.so.1
#10 0x00007f1642316e0e in start_thread () from /lib64/libpthread.so.0
#11 0x00007f1643c922fd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f1647a047c0 (LWP 3020)):
[KCrash Handler]
#6  0x00007f1639dbc71a in lockInline (this=0x846c78) at /usr/include/QtCore/qmutex.h:187
#7  QMutexLocker (m=0x846c78, this=<synthetic pointer>) at /usr/include/QtCore/qmutex.h:109
#8  Soprano::Client::SocketHandler::~SocketHandler (this=0xdfd850, __in_chrg=<optimized out>) at /usr/src/debug/soprano-2.7.6/client/clientconnection.cpp:58
#9  0x00007f1639dbc859 in Soprano::Client::SocketHandler::~SocketHandler (this=0xdfd850, __in_chrg=<optimized out>) at /usr/src/debug/soprano-2.7.6/client/clientconnection.cpp:61
#10 0x00007f1644fb75ed in QThreadStorageData::set (this=0xef0280, p=0xe11620) at thread/qthreadstorage.cpp:165
#11 0x00007f1639dba1e0 in qThreadStorage_setLocalData<Soprano::Client::SocketHandler> (d=<optimized out>, t=<optimized out>) at /usr/include/QtCore/qthreadstorage.h:92
#12 setLocalData (t=0xe11620, this=<optimized out>) at /usr/include/QtCore/qthreadstorage.h:155
#13 Soprano::Client::ClientConnection::socketForCurrentThread (this=0xeeec10) at /usr/src/debug/soprano-2.7.6/client/clientconnection.cpp:95
#14 0x00007f1639dba259 in Soprano::Client::ClientConnection::connectInCurrentThread (this=<optimized out>) at /usr/src/debug/soprano-2.7.6/client/clientconnection.cpp:800
#15 0x00007f1639db981a in Soprano::Client::LocalSocketClient::connect (this=0xdfefb8, name=...) at /usr/src/debug/soprano-2.7.6/client/localsocketclient.cpp:141
#16 0x00007f16439277c7 in ?? () from /usr/lib64/libnepomuk.so.4
#17 0x00007f164391ebf1 in Nepomuk::ResourceManager::init() () from /usr/lib64/libnepomuk.so.4
#18 0x00007f16439223c5 in ?? () from /usr/lib64/libnepomuk.so.4
#19 0x00007f164392253b in Nepomuk::ResourceManager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/libnepomuk.so.4
#20 0x00007f1645433f6b in QDBusConnectionPrivate::deliverCall (this=0x6f7bd0, object=0xdc8ed0, msg=..., metaTypes=..., slotIdx=10) at qdbusintegrator.cpp:947
#21 0x00007f16450d0e06 in QObject::event (this=0xdc8ed0, e=<optimized out>) at kernel/qobject.cpp:1204
#22 0x00007f164443afe4 in notify_helper (e=0xef0550, receiver=0xdc8ed0, this=0x700be0) at kernel/qapplication.cpp:4551
#23 QApplicationPrivate::notify_helper (this=0x700be0, receiver=0xdc8ed0, e=0xef0550) at kernel/qapplication.cpp:4523
#24 0x00007f164443fdb3 in QApplication::notify (this=0x6b2260, receiver=0xdc8ed0, e=0xef0550) at kernel/qapplication.cpp:4412
#25 0x00007f1645dbc746 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#26 0x00007f16450b7d0c in QCoreApplication::notifyInternal (this=0x6b2260, receiver=0xdc8ed0, event=0xef0550) at kernel/qcoreapplication.cpp:915
#27 0x00007f16450bb5ba in sendEvent (event=0xef0550, receiver=0xdc8ed0) at kernel/qcoreapplication.h:231
#28 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x630720) at kernel/qcoreapplication.cpp:1539
#29 0x00007f16450e69a3 in sendPostedEvents () at kernel/qcoreapplication.h:236
#30 postEventSourceDispatch (s=0x704440) at kernel/qeventdispatcher_glib.cpp:279
#31 0x00007f163b4ae58d in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#32 0x00007f163b4aed88 in ?? () from /usr/lib64/libglib-2.0.so.0
#33 0x00007f163b4aef59 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#34 0x00007f16450e6dcf in QEventDispatcherGlib::processEvents (this=0x630000, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#35 0x00007f16444de69e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#36 0x00007f16450b6842 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#37 0x00007f16450b6a97 in QEventLoop::exec (this=0x7fff97ee4f80, flags=...) at kernel/qeventloop.cpp:204
#38 0x00007f16450bb8b5 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#39 0x000000000040d90d in ?? ()
#40 0x00007f1643bcf455 in __libc_start_main () from /lib64/libc.so.6
#41 0x000000000040d941 in _start ()

Possible duplicates by query: bug 300874, bug 300828, bug 299938, bug 299325, bug 298478.

Reported using DrKonqi