Application: kontact (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.5
Operating System: Linux 3.11.4-gentoo x86_64
Distribution: "Gentoo Base System release 2.2"

-- Information about the crash:
- What I was doing when the application crashed:
I started Kontact and was about to open a mailbox, when I received a message about the email program being unable to aquire a lock due to a timeout. After clicking OK, Kontact segfaulted. (Note that this is different from a bug I reported just minutes ago, where Kontact *aborted* after I clicked OK: bug #325954)


- Unusual behavior I noticed:
The message box I received just before Kontact segfaulted:
---
Im E-Mail-Programm ist ein schwerwiegender Fehler aufgetreten. Das Programm wird beendet.
Die Fehlermeldung lautet:
Zeitüberschreitung beim Erhalten der Sperre.
---

Rough translation: Serious error in the email program. It will be closed. The error message was: Timeout while aquiring the lock.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ff62bf86780 (LWP 27659))]

Thread 6 (Thread 0x7ff626d85700 (LWP 27664)):
#0  0x0000003a0480b8b4 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x00000036aad39b42 in ?? () from /usr/lib64/qt4/libQtWebKit.so.4
#2  0x00000036aad39b79 in ?? () from /usr/lib64/qt4/libQtWebKit.so.4
#3  0x0000003a04807dff in start_thread () from /lib64/libpthread.so.0
#4  0x0000003a040e701d in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7ff626484700 (LWP 27665)):
#0  0x0000003f7a087ad9 in ?? () from /usr/lib64/libglib-2.0.so.0
#1  0x0000003f7a087e09 in g_mutex_unlock () from /usr/lib64/libglib-2.0.so.0
#2  0x0000003f7a0488d6 in ?? () from /usr/lib64/libglib-2.0.so.0
#3  0x0000003f7a048ad4 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#4  0x00000032895aa2ce in QEventDispatcherGlib::processEvents (this=0x7ff6200008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#5  0x000000328957badf in QEventLoop::processEvents (this=this@entry=0x7ff626483e60, flags=...) at kernel/qeventloop.cpp:149
#6  0x000000328957bdcd in QEventLoop::exec (this=this@entry=0x7ff626483e60, flags=...) at kernel/qeventloop.cpp:204
#7  0x0000003289479860 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:536
#8  0x000000328947c0ff in QThreadPrivate::start (arg=0xd563d0) at thread/qthread_unix.cpp:338
#9  0x0000003a04807dff in start_thread () from /lib64/libpthread.so.0
#10 0x0000003a040e701d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7ff5d3fff700 (LWP 27673)):
#0  0x0000003a0480bc61 in pthread_cond_timedwait () from /lib64/libpthread.so.0
#1  0x000000328947c5bc in wait (time=30000, this=0x13bcbf0) at thread/qwaitcondition_unix.cpp:84
#2  QWaitCondition::wait (this=<optimized out>, mutex=mutex@entry=0x13bdeb8, time=30000) at thread/qwaitcondition_unix.cpp:158
#3  0x000000328946f4ec in QThreadPoolThread::run (this=0x13c0550) at concurrent/qthreadpool.cpp:141
#4  0x000000328947c0ff in QThreadPrivate::start (arg=0x13c0550) at thread/qthread_unix.cpp:338
#5  0x0000003a04807dff in start_thread () from /lib64/libpthread.so.0
#6  0x0000003a040e701d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7ff5d0a20700 (LWP 27694)):
[KCrash Handler]
#6  QHash<QUrl, QVariant::Type>::findNode (this=this@entry=0x10, akey=..., ahp=ahp@entry=0x0) at /usr/include/qt4/QtCore/qhash.h:884
#7  0x000000328e05a621 in constFind (akey=..., this=0x10) at /usr/include/qt4/QtCore/qhash.h:861
#8  typeFromDataTypeUri (dataTypeUri=..., this=0x0) at /var/tmp/portage/dev-libs/soprano-2.9.3/work/soprano-2.9.3/soprano/literalvalue.cpp:95
#9  Soprano::LiteralValue::typeFromDataTypeUri (dataTypeUri=...) at /var/tmp/portage/dev-libs/soprano-2.9.3/work/soprano-2.9.3/soprano/literalvalue.cpp:812
#10 0x000000328e05a707 in Soprano::LiteralValue::fromString (value=..., type=...) at /var/tmp/portage/dev-libs/soprano-2.9.3/work/soprano-2.9.3/soprano/literalvalue.cpp:730
#11 0x00007ff5da005365 in Soprano::ODBC::QueryResult::getData (this=<optimized out>, colNum=colNum@entry=2) at /var/tmp/portage/dev-libs/soprano-2.9.3/work/soprano-2.9.3/backends/virtuoso/odbcqueryresult.cpp:205
#12 0x00007ff5d9ffe491 in Soprano::Virtuoso::QueryResultIteratorBackend::next (this=0x7ff5c8024940) at /var/tmp/portage/dev-libs/soprano-2.9.3/work/soprano-2.9.3/backends/virtuoso/virtuosoqueryresultiteratorbackend.cpp:146
#13 0x00000036ab85577e in Soprano::Iterator<Soprano::BindingSet>::next (this=0x7ff5d0a1fc70) at /usr/include/soprano/iterator.h:239
#14 0x00000036ab84f8ef in Nepomuk2::ResourceData::load (this=this@entry=0x7ff5c8002e60) at /var/tmp/portage/kde-base/nepomuk-core-4.11.2/work/nepomuk-core-4.11.2/libnepomukcore/resource/resourcedata.cpp:370
#15 0x00000036ab85096e in Nepomuk2::ResourceData::property (this=0x7ff5c8002e60, uri=...) at /var/tmp/portage/kde-base/nepomuk-core-4.11.2/work/nepomuk-core-4.11.2/libnepomukcore/resource/resourcedata.cpp:242
#16 0x00000036ab85c388 in Nepomuk2::Resource::property (this=this@entry=0x7ff5d0a1fdd0, uri=...) at /var/tmp/portage/kde-base/nepomuk-core-4.11.2/work/nepomuk-core-4.11.2/libnepomukcore/resource/resource.cpp:268
#17 0x00007ff5dde14b45 in MessageCore::NepomukResourceRetrieverRunnable::run (this=0x1cb8210) at /var/tmp/portage/kde-base/kdepim-common-libs-4.11.2/work/kdepim-common-libs-4.11.2/messagecore/nepomukutil/asyncnepomukresourceretriever.cpp:50
#18 0x000000328946f3f2 in QThreadPoolThread::run (this=0x1a06870) at concurrent/qthreadpool.cpp:107
#19 0x000000328947c0ff in QThreadPrivate::start (arg=0x1a06870) at thread/qthread_unix.cpp:338
#20 0x0000003a04807dff in start_thread () from /lib64/libpthread.so.0
#21 0x0000003a040e701d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7ff5c3fff700 (LWP 27695)):
#0  0x0000003a0480bc61 in pthread_cond_timedwait () from /lib64/libpthread.so.0
#1  0x000000328947c5bc in wait (time=30000, this=0x1408f50) at thread/qwaitcondition_unix.cpp:84
#2  QWaitCondition::wait (this=<optimized out>, mutex=mutex@entry=0x1408ec8, time=30000) at thread/qwaitcondition_unix.cpp:158
#3  0x000000328946f4ec in QThreadPoolThread::run (this=0x19f1c60) at concurrent/qthreadpool.cpp:141
#4  0x000000328947c0ff in QThreadPrivate::start (arg=0x19f1c60) at thread/qthread_unix.cpp:338
#5  0x0000003a04807dff in start_thread () from /lib64/libpthread.so.0
#6  0x0000003a040e701d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7ff62bf86780 (LWP 27659)):
#0  0x0000003a0480b8b4 in pthread_cond_wait () from /lib64/libpthread.so.0
#1  0x000000328947c5de in wait (time=18446744073709551615, this=0x1a064b0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=this@entry=0x1a060c0, mutex=mutex@entry=0x1a06098, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x000000328946ed92 in QThreadPoolPrivate::waitForDone (this=0x1a06010, msecs=msecs@entry=-1) at concurrent/qthreadpool.cpp:298
#4  0x000000328947023d in QThreadPool::~QThreadPool (this=0x19f6c68, __in_chrg=<optimized out>) at concurrent/qthreadpool.cpp:440
#5  0x00007ff5dde13859 in ~AsyncNepomukResourceRetrieverPrivate (this=<optimized out>, __in_chrg=<optimized out>) at /var/tmp/portage/kde-base/kdepim-common-libs-4.11.2/work/kdepim-common-libs-4.11.2/messagecore/nepomukutil/asyncnepomukresourceretriever.cpp:61
#6  MessageCore::AsyncNepomukResourceRetriever::~AsyncNepomukResourceRetriever (this=0x1a06590, __in_chrg=<optimized out>) at /var/tmp/portage/kde-base/kdepim-common-libs-4.11.2/work/kdepim-common-libs-4.11.2/messagecore/nepomukutil/asyncnepomukresourceretriever.cpp:131
#7  0x00007ff5dd821642 in ~CallbackNepomukResourceRetriever (this=0x1a06590, __in_chrg=<optimized out>) at /var/tmp/portage/kde-base/kdepim-common-libs-4.11.2/work/kdepim-common-libs-4.11.2/messagelist/core/callbacknepomukresourceretriever.h:32
#8  MessageList::CallbackNepomukResourceRetriever::~CallbackNepomukResourceRetriever (this=0x1a06590, __in_chrg=<optimized out>) at /var/tmp/portage/kde-base/kdepim-common-libs-4.11.2/work/kdepim-common-libs-4.11.2/messagelist/core/callbacknepomukresourceretriever.h:32
#9  0x0000003a040379e9 in __run_exit_handlers () from /lib64/libc.so.6
#10 0x0000003a04037a65 in exit () from /lib64/libc.so.6
#11 0x00007ff5de1220c8 in MailCommon::Kernel::emergencyExit (this=this@entry=0x11930c0, reason=...) at /var/tmp/portage/kde-base/kmail-4.11.2/work/kmail-4.11.2/mailcommon/kernel/mailkernel.cpp:228
#12 0x00007ff5de122675 in MailCommon::Kernel::createDefaultCollectionDone (this=0x11930c0, job=0x11cfad0) at /var/tmp/portage/kde-base/kmail-4.11.2/work/kmail-4.11.2/mailcommon/kernel/mailkernel.cpp:182
#13 0x0000003289590f38 in QMetaObject::activate (sender=sender@entry=0x11cfad0, m=m@entry=0x39230bc4a0 <KJob::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fff811adb60) at kernel/qobject.cpp:3547
#14 0x0000003922d32d32 in KJob::result (this=this@entry=0x11cfad0, _t1=_t1@entry=0x11cfad0) at /var/tmp/portage/kde-base/kdelibs-4.11.2-r1/work/kdelibs-4.11.2_build/kdecore/kjob.moc:207
#15 0x0000003922d32d70 in KJob::emitResult (this=0x11cfad0) at /var/tmp/portage/kde-base/kdelibs-4.11.2-r1/work/kdelibs-4.11.2/kdecore/jobs/kjob.cpp:318
#16 0x00007ff62d9a1ca0 in Akonadi::SpecialCollectionsRequestJobPrivate::lockResult (this=0x1151830, job=0x164df10) at /var/tmp/portage/kde-base/kdepimlibs-4.11.2-r1/work/kdepimlibs-4.11.2/akonadi/specialcollectionsrequestjob.cpp:121
#17 0x0000003289590f38 in QMetaObject::activate (sender=sender@entry=0x164df10, m=m@entry=0x39230bc4a0 <KJob::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fff811add30) at kernel/qobject.cpp:3547
#18 0x0000003922d32d32 in KJob::result (this=this@entry=0x164df10, _t1=_t1@entry=0x164df10) at /var/tmp/portage/kde-base/kdelibs-4.11.2-r1/work/kdelibs-4.11.2_build/kdecore/kjob.moc:207
#19 0x0000003922d32d70 in KJob::emitResult (this=0x164df10) at /var/tmp/portage/kde-base/kdelibs-4.11.2-r1/work/kdelibs-4.11.2/kdecore/jobs/kjob.cpp:318
#20 0x00007ff62d99b402 in Akonadi::GetLockJob::Private::timeout (this=0xe13190) at /var/tmp/portage/kde-base/kdepimlibs-4.11.2-r1/work/kdepimlibs-4.11.2/akonadi/specialcollectionshelperjobs.cpp:613
#21 0x0000003289590f38 in QMetaObject::activate (sender=0x1636ac0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#22 0x00000032895951d9 in QObject::event (this=0x1636ac0, e=<optimized out>) at kernel/qobject.cpp:1156
#23 0x00000036a8bcb05c in QApplicationPrivate::notify_helper (this=this@entry=0xb498f0, receiver=receiver@entry=0x1636ac0, e=e@entry=0x7fff811ae270) at kernel/qapplication.cpp:4562
#24 0x00000036a8bd16d8 in QApplication::notify (this=this@entry=0x7fff811ae600, receiver=receiver@entry=0x1636ac0, e=e@entry=0x7fff811ae270) at kernel/qapplication.cpp:4348
#25 0x00000036a6c406fb in KApplication::notify (this=0x7fff811ae600, receiver=0x1636ac0, event=0x7fff811ae270) at /var/tmp/portage/kde-base/kdelibs-4.11.2-r1/work/kdelibs-4.11.2/kdeui/kernel/kapplication.cpp:311
#26 0x000000328957cecc in QCoreApplication::notifyInternal (this=0x7fff811ae600, receiver=0x1636ac0, event=0x7fff811ae270) at kernel/qcoreapplication.cpp:949
#27 0x00000032895acdcb in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#28 QTimerInfoList::activateTimers (this=0xb482d0) at kernel/qeventdispatcher_unix.cpp:621
#29 0x00000032895aa081 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:186
#30 0x0000003f7a0486d5 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#31 0x0000003f7a048a28 in ?? () from /usr/lib64/libglib-2.0.so.0
#32 0x0000003f7a048ad4 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#33 0x00000032895aa2b3 in QEventDispatcherGlib::processEvents (this=0xb0cb00, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#34 0x00000036a8c6a20e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#35 0x000000328957badf in QEventLoop::processEvents (this=this@entry=0x7fff811ae500, flags=...) at kernel/qeventloop.cpp:149
#36 0x000000328957bdcd in QEventLoop::exec (this=this@entry=0x7fff811ae500, flags=...) at kernel/qeventloop.cpp:204
#37 0x0000003289581009 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1221
#38 0x00000036a8bc960c in QApplication::exec () at kernel/qapplication.cpp:3823
#39 0x0000000000403740 in main (argc=1, argv=0x7fff811ae748) at /var/tmp/portage/kde-base/kontact-4.11.2/work/kontact-4.11.2/kontact/src/main.cpp:219

Reported using DrKonqi