Application: kactivitymanagerd (1.0)
KDE Platform Version: 4.7.97 (4.8 RC2 (4.7.97) (Compiled from sources)
Qt Version: 4.8.0
Operating System: Linux 3.2.1-gentoo x86_64
Distribution: "Gentoo Base System release 2.0.3"

-- Information about the crash:
This crash regularly happen when starting KDE.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Gestionnaire des activités de KDE (kactivitymanagerd), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f89230e4760 (LWP 6500))]

Thread 2 (Thread 0x7f8913fbb700 (LWP 6503)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:39
#1  0x00007f8921a6277b in _q_futex (val2=0, addr2=0x0, timeout=0x0, val=2, op=0, addr=0x13f73e0) at thread/qmutex_unix.cpp:99
#2  QMutexPrivate::wait (this=0x13f73e0, timeout=<optimized out>) at thread/qmutex_unix.cpp:113
#3  0x00007f8921a5e54d in QMutex::lockInternal (this=<optimized out>) at thread/qmutex.cpp:450
#4  0x00007f892217e8ef in lockInline (this=0x1430f48) at /usr/include/qt4/QtCore/qmutex.h:190
#5  QMutexLocker (m=0x1430f48, this=<synthetic pointer>) at /usr/include/qt4/QtCore/qmutex.h:109
#6  Nepomuk::ResourceManager::initialized (this=0x13f74b0) at /usr/src/debug/kde-base/kdelibs-4.7.97-r1/kdelibs-4.7.97/nepomuk/core/resourcemanager.cpp:339
#7  0x00007f892217e9f8 in Nepomuk::ResourceManager::mainModel (this=0x13f74b0) at /usr/src/debug/kde-base/kdelibs-4.7.97-r1/kdelibs-4.7.97/nepomuk/core/resourcemanager.cpp:508
#8  0x00007f8913fc324f in ?? () from /usr/lib64/kde4/activitymanager_plugin_nepomuk.so
#9  0x00007f8913fc9fc0 in ?? () from /usr/lib64/kde4/activitymanager_plugin_nepomuk.so
#10 0x00007f8921a63cab in QThreadPrivate::start (arg=0x1543fa0) at thread/qthread_unix.cpp:298
#11 0x00007f89204a9e6c in start_thread (arg=0x7f8913fbb700) at pthread_create.c:301
#12 0x00007f8920792b1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f89230e4760 (LWP 6500)):
[KCrash Handler]
#6  QMutex::lock (this=0x128c5e8) at thread/qmutex.cpp:153
#7  0x00007f891d88aa97 in lockInline (this=0x128c5e8) at /usr/include/qt4/QtCore/qmutex.h:198
#8  QMutexLocker (m=0x128c5e8, this=<synthetic pointer>) at /usr/include/qt4/QtCore/qmutex.h:109
#9  Soprano::Client::SocketHandler::~SocketHandler (this=0x14427f0, __in_chrg=<optimized out>) at /usr/src/debug/dev-libs/soprano-2.7.3/soprano-2.7.3/client/clientconnection.cpp:58
#10 0x00007f891d88ab1f in Soprano::Client::SocketHandler::~SocketHandler (this=0x14427f0, __in_chrg=<optimized out>) at /usr/src/debug/dev-libs/soprano-2.7.3/soprano-2.7.3/client/clientconnection.cpp:61
#11 0x00007f891d88ab38 in qThreadStorage_deleteData<Soprano::Client::SocketHandler> (d=<optimized out>) at /usr/include/qt4/QtCore/qthreadstorage.h:97
#12 QThreadStorage<Soprano::Client::SocketHandler*>::deleteData (x=<optimized out>) at /usr/include/qt4/QtCore/qthreadstorage.h:140
#13 0x00007f8921a61c7d in QThreadStorageData::set (this=0x144d940, p=0x14e1580) at thread/qthreadstorage.cpp:165
#14 0x00007f891d88888c in qThreadStorage_setLocalData<Soprano::Client::SocketHandler> (t=<synthetic pointer>, d=<optimized out>) at /usr/include/qt4/QtCore/qthreadstorage.h:92
#15 setLocalData (t=0x14e1580, this=<optimized out>) at /usr/include/qt4/QtCore/qthreadstorage.h:155
#16 Soprano::Client::ClientConnection::socketForCurrentThread (this=0x1488820) at /usr/src/debug/dev-libs/soprano-2.7.3/soprano-2.7.3/client/clientconnection.cpp:95
#17 0x00007f891d8888bb in Soprano::Client::ClientConnection::connectInCurrentThread (this=<optimized out>) at /usr/src/debug/dev-libs/soprano-2.7.3/soprano-2.7.3/client/clientconnection.cpp:754
#18 0x00007f891d887e02 in Soprano::Client::LocalSocketClient::connect (this=0x1432758, name=...) at /usr/src/debug/dev-libs/soprano-2.7.3/soprano-2.7.3/client/localsocketclient.cpp:141
#19 0x00007f89221850ce in init (forced=true, this=0x1432730) at /usr/src/debug/kde-base/kdelibs-4.7.97-r1/kdelibs-4.7.97/nepomuk/core/nepomukmainmodel.cpp:102
#20 Nepomuk::MainModel::init (this=0x1431c70) at /usr/src/debug/kde-base/kdelibs-4.7.97-r1/kdelibs-4.7.97/nepomuk/core/nepomukmainmodel.cpp:176
#21 0x00007f892217e59f in Nepomuk::ResourceManager::init (this=0x13f74b0) at /usr/src/debug/kde-base/kdelibs-4.7.97-r1/kdelibs-4.7.97/nepomuk/core/resourcemanager.cpp:331
#22 0x00007f89221803a7 in Nepomuk::ResourceManagerPrivate::_k_storageServiceInitialized (this=0x1430f30, success=<optimized out>) at /usr/src/debug/kde-base/kdelibs-4.7.97-r1/kdelibs-4.7.97/nepomuk/core/resourcemanager.cpp:221
#23 0x00007f8922180422 in Nepomuk::ResourceManager::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /usr/src/debug/kde-base/kdelibs-4.7.97-r1/kdelibs-4.7.97_build/nepomuk/resourcemanager.moc:67
#24 0x00007f892218047c in Nepomuk::ResourceManager::qt_metacall (this=0x13f74b0, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0x7fffe3ca4870) at /usr/src/debug/kde-base/kdelibs-4.7.97-r1/kdelibs-4.7.97_build/nepomuk/resourcemanager.moc:107
#25 0x00007f8921edc281 in QDBusConnectionPrivate::deliverCall (this=0x128e2a0, object=0x13f74b0, msg=..., metaTypes=..., slotIdx=9) at qdbusintegrator.cpp:947
#26 0x00007f8921b7ace6 in QObject::event (this=0x13f74b0, e=<optimized out>) at kernel/qobject.cpp:1195
#27 0x00007f8920f13874 in notify_helper (e=0x1462130, receiver=0x13f74b0, this=0x12b2760) at kernel/qapplication.cpp:4550
#28 QApplicationPrivate::notify_helper (this=0x12b2760, receiver=0x13f74b0, e=0x1462130) at kernel/qapplication.cpp:4522
#29 0x00007f8920f186f3 in QApplication::notify (this=0x7fffe3ca53b0, receiver=0x13f74b0, e=0x1462130) at kernel/qapplication.cpp:4411
#30 0x00007f8922639181 in KApplication::notify (this=0x7fffe3ca53b0, receiver=0x13f74b0, event=0x1462130) at /usr/src/debug/kde-base/kdelibs-4.7.97-r1/kdelibs-4.7.97/kdeui/kernel/kapplication.cpp:311
#31 0x00007f8921b61d9c in QCoreApplication::notifyInternal (this=0x7fffe3ca53b0, receiver=0x13f74b0, event=0x1462130) at kernel/qcoreapplication.cpp:876
#32 0x00007f8921b6563a in sendEvent (event=0x1462130, receiver=0x13f74b0) at src/corelib/kernel/qcoreapplication.h:231
#33 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x126b460) at kernel/qcoreapplication.cpp:1500
#34 0x00007f8921b908a3 in sendPostedEvents () at src/corelib/kernel/qcoreapplication.h:236
#35 postEventSourceDispatch (s=0x12b26b0) at kernel/qeventdispatcher_glib.cpp:279
#36 0x00007f891cd4781c in g_main_dispatch (context=0x12a6a00) at gmain.c:2441
#37 g_main_context_dispatch (context=0x12a6a00) at gmain.c:3011
#38 0x00007f891cd47ddb in g_main_context_iterate (context=0x12a6a00, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3089
#39 0x00007f891cd47fa5 in g_main_context_iteration (context=0x12a6a00, may_block=1) at gmain.c:3152
#40 0x00007f8921b90ccf in QEventDispatcherGlib::processEvents (this=0x126b110, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#41 0x00007f8920fb649e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x00007f8921b60b82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#43 0x00007f8921b60dd7 in QEventLoop::exec (this=0x7fffe3ca5340, flags=...) at kernel/qeventloop.cpp:204
#44 0x00007f8921b65935 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#45 0x0000000000405974 in ?? ()
#46 0x00007f89206defad in __libc_start_main (main=0x4057e0, argc=1, ubp_av=0x7fffe3ca55a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe3ca5598) at libc-start.c:226
#47 0x00000000004059c9 in _start ()

Reported using DrKonqi