Application: dolphin (1.4)
KDE Platform Version: 4.4.3 (KDE 4.4.3)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-3-686 i686
Distribution: Debian GNU/Linux testing (squeeze)

-- Information about the crash:
Dolphin has always randomly crashed quite often since switching to KDE 4. This is the first time I've gotten a backtrace for a Dolphin crash. Unrelated, but sometimes Dolphin won't launch, and a second attempt will unfreeze.

The crash can be reproduced some of the time.

 -- Backtrace:
Application: Dolphin (dolphin), signal: Segmentation fault
__pthread_mutex_unlock_usercnt (mutex=0x98d36ec, decr=1)
    at pthread_mutex_unlock.c:36
	in pthread_mutex_unlock.c
The current source language is "auto; currently c".
[Current thread is 1 (Thread 0xb4e48700 (LWP 2972))]

Thread 4 (Thread 0xb3299b70 (LWP 2974)):
[KCrash Handler]
#6  0xb68bc569 in QMutex::lock (this=0x98c7e28) at thread/qmutex.cpp:150
#7  0xb5851400 in ?? () from /usr/lib/libsopranoclient.so.1
#8  0xb75829b3 in Nepomuk::MainModel::executeQuery (this=0x98c6190, query=..., language=Soprano::Query::QueryLanguageSparql, userQueryLanguage=...) at ../../../nepomuk/core/nepomukmainmodel.cpp:214
#9  0xb74b02bd in Soprano::FilterModel::executeQuery(QString const&, Soprano::Query::QueryLanguage, QString const&) const () from /usr/lib/libsoprano.so.4
#10 0xb7577ed2 in Nepomuk::ResourceData::load (this=0x9a4b348) at ../../../nepomuk/core/resourcedata.cpp:447
#11 0xb757813b in Nepomuk::ResourceData::property (this=0x9a4b348, uri=...) at ../../../nepomuk/core/resourcedata.cpp:271
#12 0xb7595c67 in Nepomuk::Resource::property (this=0xb32992c4, uri=...) at ../../../nepomuk/core/resource.cpp:280
#13 0xb75987b1 in Nepomuk::Resource::rating (this=0xb32992c4) at ../../../nepomuk/core/resource.cpp:800
#14 0x080aa1f9 in KLoadMetaDataThread::run (this=0x9be2d60) at ../../../../apps/dolphin/src/panels/information/kloadmetadatathread.cpp:95
#15 0xb68c193e in QThreadPrivate::start (arg=0x9be2d60) at thread/qthread_unix.cpp:248
#16 0xb55b5585 in start_thread (arg=0xb3299b70) at pthread_create.c:300
#17 0xb5c2829e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 3 (Thread 0xb282eb70 (LWP 2978)):
#0  0xb7835424 in __kernel_vsyscall ()
#1  0xb5c21591 in select () from /lib/i686/cmov/libc.so.6
#2  0xb69ec5e2 in qt_safe_select (nfds=14, fdread=0xb282dc78, fdwrite=0xb282dbf8, fdexcept=0x0, orig_timeout=0x0) at kernel/qcore_unix.cpp:143
#3  0xb699ce4e in select_msecs (nfds=14, fdread=0xb282dc78, fdwrite=0xb282dbf8, timeout=-1) at io/qprocess_unix.cpp:885
#4  0xb699da18 in QProcessPrivate::waitForFinished (this=0x9c7eb28, msecs=-1) at io/qprocess_unix.cpp:1101
#5  0xb695a40e in QProcess::waitForFinished (this=0xb282dd84, msecs=-1) at io/qprocess.cpp:1688
#6  0xb695efe1 in QProcess::execute (program=..., arguments=...) at io/qprocess.cpp:2074
#7  0xb6c66af0 in KToolInvocation::startKdeinit () at ../../kdecore/kernel/ktoolinvocation.cpp:382
#8  0xb6c66cb9 in KToolInvocation::klauncher () at ../../kdecore/kernel/ktoolinvocation.cpp:63
#9  0xb6d359a6 in KSycocaPrivate::checkDatabase (this=0x9cfe518, ifNotFound=...) at ../../kdecore/sycoca/ksycoca.cpp:427
#10 0xb6d36562 in KSycoca::findFactory (this=0x994cf58, id=KST_KProtocolInfoFactory) at ../../kdecore/sycoca/ksycoca.cpp:455
#11 0xb6d39f6c in KSycocaFactory (this=0x9d886a8, factory_id=KST_KProtocolInfoFactory) at ../../kdecore/sycoca/ksycocafactory.cpp:53
#12 0xb6d414ed in KProtocolInfoFactory (this=0x9d886a8) at ../../kdecore/sycoca/kprotocolinfofactory.cpp:29
#13 0xb6d4179c in KSycocaFactorySingleton<KProtocolInfoFactory>::self () at ../../kdecore/sycoca/ksycocafactory.h:200
#14 KProtocolInfoFactory::self () at ../../kdecore/sycoca/kprotocolinfofactory.cpp:121
#15 0xb6d3ba77 in KProtocolInfo::isKnownProtocol (protocol=...) at ../../kdecore/sycoca/kprotocolinfo.cpp:447
#16 0xb6d3bbd4 in KProtocolInfo::isKnownProtocol (url=...) at ../../kdecore/sycoca/kprotocolinfo.cpp:441
#17 0x080a9961 in KLoadMetaDataThread::formatValue (this=0x9d79710, value=...) at ../../../../apps/dolphin/src/panels/information/kloadmetadatathread.cpp:190
#18 0x080aa78c in KLoadMetaDataThread::run (this=0x9d79710) at ../../../../apps/dolphin/src/panels/information/kloadmetadatathread.cpp:121
#19 0xb68c193e in QThreadPrivate::start (arg=0x9d79710) at thread/qthread_unix.cpp:248
#20 0xb55b5585 in start_thread (arg=0xb282eb70) at pthread_create.c:300
#21 0xb5c2829e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 2 (Thread 0xb2015b70 (LWP 2987)):
#0  0xb7835424 in __kernel_vsyscall ()
#1  0xb5c21591 in select () from /lib/i686/cmov/libc.so.6
#2  0xb699e6ef in QProcessManager::run (this=0xb6ad9370) at io/qprocess_unix.cpp:245
#3  0xb68c193e in QThreadPrivate::start (arg=0xb6ad9370) at thread/qthread_unix.cpp:248
#4  0xb55b5585 in start_thread (arg=0xb2015b70) at pthread_create.c:300
#5  0xb5c2829e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb4e48700 (LWP 2972)):
#0  __pthread_mutex_unlock_usercnt (mutex=0x98d36ec, decr=1) at pthread_mutex_unlock.c:36
#1  0xb5c35a16 in pthread_mutex_unlock (mutex=0x98d36ec) at forward.c:184
#2  0xb53a30d1 in ?? () from /usr/lib/libxcb.so.1
#3  0xb53a5761 in xcb_wait_for_reply () from /usr/lib/libxcb.so.1
#4  0xb59a77a6 in _XReply () from /usr/lib/libX11.so.6
#5  0xb59950ad in XQueryPointer () from /usr/lib/libX11.so.6
#6  0xb5fa8260 in QCursor::pos () at kernel/qcursor_x11.cpp:155
#7  0xb64a4647 in QAbstractItemView::verticalScrollbarValueChanged (this=0x9a8b378, value=0) at itemviews/qabstractitemview.cpp:2580
#8  0xb64ab0a5 in QAbstractItemView::qt_metacall (this=0x9a8b378, _c=QMetaObject::InvokeMetaMethod, _id=26, _a=0xbfab83e8) at .moc/release-shared/moc_qabstractitemview.cpp:244
#9  0xb663aa3a in QListView::qt_metacall (this=0x9a8b378, _c=QMetaObject::InvokeMetaMethod, _id=57, _a=0xbfab83e8) at .moc/release-shared/moc_qlistview.cpp:111
#10 0xb6f6679d in KCategorizedView::qt_metacall (this=0x9a8b378, _c=QMetaObject::InvokeMetaMethod, _id=57, _a=0xbfab83e8) at ./kcategorizedview.moc:75
#11 0xb76af5aa in DolphinIconsView::qt_metacall (this=0x9a8b378, _c=QMetaObject::InvokeMetaMethod, _id=57, _a=0xbfab83e8) at ./dolphiniconsview.moc:77
#12 0xb69c8aea in QMetaObject::metacall (object=0x9a8b378, cl=QMetaObject::ReadProperty, idx=57, argv=0xbfab83e8) at kernel/qmetaobject.cpp:237
#13 0xb69d70b5 in QMetaObject::activate (sender=0x9a8a5e0, m=0xb68416b4, local_signal_index=0, argv=0xbfab83e8) at kernel/qobject.cpp:3293
#14 0xb66329e3 in QAbstractSlider::valueChanged (this=0x9a8a5e0, _t1=0) at .moc/release-shared/moc_qabstractslider.cpp:182
#15 0xb63145a7 in QAbstractSlider::setValue (this=0x9a8a5e0, value=0) at widgets/qabstractslider.cpp:542
#16 0xb6314f8c in QAbstractSlider::setRange (this=0x9a8a5e0, min=0, max=0) at widgets/qabstractslider.cpp:251
#17 0xb64d1820 in QListView::updateGeometries (this=0x9a8b378) at itemviews/qlistview.cpp:1478
#18 0xb6f68a7f in KCategorizedView::updateGeometries (this=0x9a8b378) at ../../kdeui/itemviews/kcategorizedview.cpp:1279
#19 0xb64a1003 in QAbstractItemView::doItemsLayout (this=0x9a8b378) at itemviews/qabstractitemview.cpp:1135
#20 0xb64c4ef9 in QListView::doItemsLayout (this=0x9a8b378) at itemviews/qlistview.cpp:1466
#21 0xb64a1e5f in QAbstractItemView::timerEvent (this=0x9a8b378, event=0xbfab8ed0) at itemviews/qabstractitemview.cpp:2365
#22 0xb64c530a in QListView::timerEvent (this=0x9a8b378, e=0xbfab8ed0) at itemviews/qlistview.cpp:817
#23 0xb69d3f34 in QObject::event (this=0x9a8b378, e=0x0) at kernel/qobject.cpp:1212
#24 0xb5f689a6 in QWidget::event (this=0x9a8b378, event=0xbfab8ed0) at kernel/qwidget.cpp:8455
#25 0xb63614a3 in QFrame::event (this=0x9a8b378, e=0xbfab8ed0) at widgets/qframe.cpp:557
#26 0xb63fc447 in QAbstractScrollArea::event (this=0x9a8b378, e=0xbfab8ed0) at widgets/qabstractscrollarea.cpp:989
#27 0xb64a917c in QAbstractItemView::event (this=0x9a8b378, event=0xbfab8ed0) at itemviews/qabstractitemview.cpp:1546
#28 0xb64c4e54 in QListView::event (this=0x9a8b378, e=0xbfab8ed0) at itemviews/qlistview.cpp:1624
#29 0xb5f0abec in QApplicationPrivate::notify_helper (this=0x98c4b08, receiver=0x9a8b378, e=0xbfab8ed0) at kernel/qapplication.cpp:4300
#30 0xb5f117f9 in QApplication::notify (this=0xbfab9234, receiver=0x9a8b378, e=0xbfab8ed0) at kernel/qapplication.cpp:4265
#31 0xb6f8c7da in KApplication::notify (this=0xbfab9234, receiver=0x9a8b378, event=0xbfab8ed0) at ../../kdeui/kernel/kapplication.cpp:302
#32 0xb69c38eb in QCoreApplication::notifyInternal (this=0xbfab9234, receiver=0x9a8b378, event=0xbfab8ed0) at kernel/qcoreapplication.cpp:704
#33 0xb69f2946 in QCoreApplication::sendEvent (this=0x98cdb7c) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#34 QTimerInfoList::activateTimers (this=0x98cdb7c) at kernel/qeventdispatcher_unix.cpp:603
#35 0xb69ef604 in timerSourceDispatch (source=0x98cdb48) at kernel/qeventdispatcher_glib.cpp:184
#36 0xb550f2f5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#37 0xb5512fd8 in ?? () from /lib/libglib-2.0.so.0
#38 0xb55131b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#39 0xb69ef2f5 in QEventDispatcherGlib::processEvents (this=0x98a6328, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#40 0xb5fc9255 in QGuiEventDispatcherGlib::processEvents (this=0x98a6328, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#41 0xb69c1f09 in QEventLoop::processEvents (this=0xbfab9194, flags=) at kernel/qeventloop.cpp:149
#42 0xb69c235a in QEventLoop::exec (this=0xbfab9194, flags=...) at kernel/qeventloop.cpp:201
#43 0xb69c64ef in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#44 0xb5f0ac87 in QApplication::exec () at kernel/qapplication.cpp:3579
#45 0x0807bc1f in main (argc=5, argv=0xbfab93f4) at ../../../../apps/dolphin/src/main.cpp:101

This bug may be a duplicate of or related to bug 237006, bug 234928, bug 234766.

Possible duplicates by query: bug 238662, bug 238572, bug 237998, bug 237968, bug 237845.

Reported using DrKonqi