Application: kwin (4.10.1)
KDE Platform Version: 4.10.1
Qt Version: 4.8.3
Operating System: Linux 3.8.1-030801-generic x86_64
Distribution: Ubuntu 12.10

-- Information about the crash:
- What I was doing when the application crashed:
I tried to give Okular a special kde-windows setting: always to maximise vertically on initialisation.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1b75fc27c0 (LWP 9391))]

Thread 4 (Thread 0x7f1b5a10d700 (LWP 9393)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:215
#1  0x00007f1b70afffd7 in wait (time=30000, this=0x24dbda0) at thread/qwaitcondition_unix.cpp:84
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x24dbd18, time=30000) at thread/qwaitcondition_unix.cpp:158
#3  0x00007f1b70af357f in QThreadPoolThread::run (this=0x24dbe80) at concurrent/qthreadpool.cpp:141
#4  0x00007f1b70affb1c in QThreadPrivate::start (arg=0x24dbe80) at thread/qthread_unix.cpp:338
#5  0x00007f1b69bc0e9a in start_thread (arg=0x7f1b5a10d700) at pthread_create.c:308
#6  0x00007f1b757e5ccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f1b596f6700 (LWP 9396)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f1b720ddcd7 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f1b720ddd09 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f1b69bc0e9a in start_thread (arg=0x7f1b596f6700) at pthread_create.c:308
#4  0x00007f1b757e5ccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f1b53943700 (LWP 9397)):
#0  0x00007f1b757df033 in select () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007f1b70c28053 in qt_safe_select (nfds=16, fdread=0x7f1b4c000ac8, fdwrite=0x7f1b4c000d60, fdexcept=0x7f1b4c000ff8, orig_timeout=0x0) at kernel/qcore_unix.cpp:83
#2  0x00007f1b70c2ca14 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0x7f1b4c000910, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:223
#3  0x00007f1b70c2d5a2 in QEventDispatcherUNIX::processEvents (this=0x7f1b4c0008f0, flags=...) at kernel/qeventdispatcher_unix.cpp:926
#4  0x00007f1b70bfb2ef in QEventLoop::processEvents (this=this@entry=0x7f1b53942d90, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1b70bfb578 in QEventLoop::exec (this=0x7f1b53942d90, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f1b70afcb40 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f1b70bdb9df in QInotifyFileSystemWatcherEngine::run (this=0x2897d10) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f1b70affb1c in QThreadPrivate::start (arg=0x2897d10) at thread/qthread_unix.cpp:338
#9  0x00007f1b69bc0e9a in start_thread (arg=0x7f1b53943700) at pthread_create.c:308
#10 0x00007f1b757e5ccd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f1b75fc27c0 (LWP 9391)):
[KCrash Handler]
#6  0x00007f1b70559364 in QGraphicsItem::parentItem (this=0x7f1b74828220 <QDeclarativeJS::AST::Visitor::visit(QDeclarativeJS::AST::SwitchStatement*)>) at graphicsview/qgraphicsitem.cpp:1576
#7  0x00007f1b74766f84 in QDeclarativeItem::~QDeclarativeItem (this=0x27bebb0, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1675
#8  0x00007f1b7472a6ee in ~QDeclarativeElement (this=0x27bebb0, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x27bebb0, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#10 0x00007f1b70c11498 in QObject::event (this=0x27bebb0, e=<optimized out>) at kernel/qobject.cpp:1176
#11 0x00007f1b6ffa3e9c in QApplicationPrivate::notify_helper (this=this@entry=0x232fcf0, receiver=receiver@entry=0x27bebb0, e=e@entry=0x353fce0) at kernel/qapplication.cpp:4562
#12 0x00007f1b6ffa830a in QApplication::notify (this=0x7fff4bbf8010, receiver=0x27bebb0, e=0x353fce0) at kernel/qapplication.cpp:4423
#13 0x00007f1b752d3ad6 in KApplication::notify (this=0x7fff4bbf8010, receiver=0x27bebb0, event=0x353fce0) at ../../kdeui/kernel/kapplication.cpp:311
#14 0x00007f1b70bfc59e in QCoreApplication::notifyInternal (this=0x7fff4bbf8010, receiver=receiver@entry=0x27bebb0, event=event@entry=0x353fce0) at kernel/qcoreapplication.cpp:915
#15 0x00007f1b70c00421 in sendEvent (event=0x353fce0, receiver=0x27bebb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#16 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x22c71f0) at kernel/qcoreapplication.cpp:1539
#17 0x00007f1b7004989c in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#18 QEventDispatcherX11::processEvents (this=0x22c8ad0, flags=...) at kernel/qeventdispatcher_x11.cpp:75
#19 0x00007f1b70bfb2ef in QEventLoop::processEvents (this=this@entry=0x7fff4bbf7d20, flags=...) at kernel/qeventloop.cpp:149
#20 0x00007f1b70bfb578 in QEventLoop::exec (this=0x7fff4bbf7d20, flags=...) at kernel/qeventloop.cpp:204
#21 0x00007f1b70c00738 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#22 0x00007f1b75b18d6a in kdemain (argc=3, argv=0x7fff4bbf8158) at ../../kwin/main.cpp:537
#23 0x00007f1b7571376d in __libc_start_main (main=0x4006a0 <main(int, char**)>, argc=3, ubp_av=0x7fff4bbf8158, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff4bbf8148) at libc-start.c:226
#24 0x00000000004006d1 in _start ()

Reported using DrKonqi