Application: kwin (4.9.00)
KDE Platform Version: 4.9.00 (Compiled from sources)
Qt Version: 4.8.2
Operating System: Linux 3.3.8-gentoo x86_64
Distribution: "Gentoo Base System release 2.1"

-- Information about the crash:
- What I was doing when the application crashed:
on vlc I did: Alt+F3 > Advanced > No border > crash
tried it multible times with same result
on dolphin it worked fine

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f3d488687c0 (LWP 21294))]

Thread 2 (Thread 0x7f3d2d1fb700 (LWP 21296)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f3d45353d6c in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f3d4562be20) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f3d45353da9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f3d43602004 in start_thread (arg=0x7f3d2d1fb700) at pthread_create.c:305
#4  0x00007f3d4157af6d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f3d488687c0 (LWP 21294)):
[KCrash Handler]
#6  0x00007f3d4538f646 in APIShim (engine=0x31987e0, this=<synthetic pointer>) at api/qscriptengine_p.h:412
#7  QScriptValue::toVariant (this=<optimized out>) at api/qscriptvalue.cpp:1231
#8  0x00007f3d47a1e6ac in QDeclarativeEnginePrivate::scriptValueToVariant (this=0x271a6e0, val=..., hint=508) at qml/qdeclarativeengine.cpp:2121
#9  0x00007f3d47a25242 in QDeclarativeExpressionPrivate::value (this=0x2f5c9c0, secondaryScope=0x3257ed0, isUndefined=0x0) at qml/qdeclarativeexpression.cpp:667
#10 0x00007f3d47a5e704 in QDeclarativeBoundSignal::qt_metacall (this=0x2f5c840, c=<optimized out>, id=<optimized out>, a=0x7fff78d297d0) at qml/qdeclarativeboundsignal.cpp:186
#11 0x00007f3d439b72b2 in QMetaObject::activate (sender=0x2f5b8f0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff78d297d0) at kernel/qobject.cpp:3566
#12 0x00007f3d47b1e991 in QDeclarativeMouseArea::pressed (this=<optimized out>, _t1=0x7fff78d29820) at .moc/release-shared/moc_qdeclarativemousearea_p.cpp:502
#13 0x00007f3d479c09fd in QDeclarativeMouseArea::setPressed (this=0x2f5b8f0, p=<optimized out>) at graphicsitems/qdeclarativemousearea.cpp:926
#14 0x00007f3d479c1722 in QDeclarativeMouseArea::mousePressEvent (this=0x2f5b8f0, event=0x7fff78d2a2d0) at graphicsitems/qdeclarativemousearea.cpp:498
#15 0x00007f3d430d8e04 in QGraphicsItem::sceneEvent (this=0x2f5b900, event=0x7fff78d2a2d0) at graphicsview/qgraphicsitem.cpp:6738
#16 0x00007f3d479b2e29 in QDeclarativeItem::sceneEvent (this=0x2f5b8f0, event=0x7fff78d2a2d0) at graphicsitems/qdeclarativeitem.cpp:3013
#17 0x00007f3d479c01b6 in QDeclarativeMouseArea::sceneEvent (this=0x2f5b8f0, event=0x7fff78d2a2d0) at graphicsitems/qdeclarativemousearea.cpp:682
#18 0x00007f3d43102975 in QGraphicsScenePrivate::sendMouseEvent (this=0x2f45c50, mouseEvent=0x7fff78d2a2d0) at graphicsview/qgraphicsscene.cpp:1295
#19 0x00007f3d431079ec in QGraphicsScenePrivate::mousePressEventHandler (this=0x2f45c50, mouseEvent=0x7fff78d2a2d0) at graphicsview/qgraphicsscene.cpp:1422
#20 0x00007f3d43107f6c in QGraphicsScene::mousePressEvent (this=<optimized out>, mouseEvent=0x7fff78d2a2d0) at graphicsview/qgraphicsscene.cpp:4074
#21 0x00007f3d43111187 in QGraphicsScene::event (this=0x2f413a0, event=0x7fff78d2a2d0) at graphicsview/qgraphicsscene.cpp:3455
#22 0x00007f3d42afb034 in notify_helper (e=0x7fff78d2a2d0, receiver=0x2f413a0, this=0x2600120) at kernel/qapplication.cpp:4551
#23 QApplicationPrivate::notify_helper (this=0x2600120, receiver=0x2f413a0, e=0x7fff78d2a2d0) at kernel/qapplication.cpp:4523
#24 0x00007f3d42affe9f in QApplication::notify (this=0x7fff78d2b8b0, receiver=0x2f413a0, e=0x7fff78d2a2d0) at kernel/qapplication.cpp:3933
#25 0x00007f3d4475572d in KApplication::notify (this=0x7fff78d2b8b0, receiver=0x2f413a0, event=0x7fff78d2a2d0) at /var/tmp/portage/kde-base/kdelibs-4.9.0/work/kdelibs-4.9.0/kdeui/kernel/kapplication.cpp:311
#26 0x00007f3d439a246c in QCoreApplication::notifyInternal (this=0x7fff78d2b8b0, receiver=0x2f413a0, event=0x7fff78d2a2d0) at kernel/qcoreapplication.cpp:915
#27 0x00007f3d43127e88 in QGraphicsView::mousePressEvent (this=0x2f44c30, event=0x7fff78d2ae50) at graphicsview/qgraphicsview.cpp:3164
#28 0x00007f3d42b4e119 in QWidget::event (this=0x2f44c30, event=0x7fff78d2ae50) at kernel/qwidget.cpp:8367
#29 0x00007f3d42efc4e3 in QFrame::event (this=0x2f44c30, e=0x7fff78d2ae50) at widgets/qframe.cpp:557
#30 0x00007f3d43130bcb in QGraphicsView::viewportEvent (this=0x2f44c30, event=0x7fff78d2ae50) at graphicsview/qgraphicsview.cpp:2866
#31 0x00007f3d439a25f0 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x2fcff00, event=0x7fff78d2ae50) at kernel/qcoreapplication.cpp:1025
#32 0x00007f3d42afb014 in notify_helper (e=0x7fff78d2ae50, receiver=0x2fcff00, this=0x2600120) at kernel/qapplication.cpp:4547
#33 QApplicationPrivate::notify_helper (this=0x2600120, receiver=0x2fcff00, e=0x7fff78d2ae50) at kernel/qapplication.cpp:4523
#34 0x00007f3d42b007cb in QApplication::notify (this=<optimized out>, receiver=0x2fcff00, e=0x7fff78d2ae50) at kernel/qapplication.cpp:4094
#35 0x00007f3d4475572d in KApplication::notify (this=0x7fff78d2b8b0, receiver=0x2fcff00, event=0x7fff78d2ae50) at /var/tmp/portage/kde-base/kdelibs-4.9.0/work/kdelibs-4.9.0/kdeui/kernel/kapplication.cpp:311
#36 0x00007f3d439a246c in QCoreApplication::notifyInternal (this=0x7fff78d2b8b0, receiver=0x2fcff00, event=0x7fff78d2ae50) at kernel/qcoreapplication.cpp:915
#37 0x00007f3d42afbf62 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#38 QApplicationPrivate::sendMouseEvent (receiver=0x2fcff00, event=0x7fff78d2ae50, alienWidget=0x0, nativeWidget=0x2fcff00, buttonDown=0x0, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3162
#39 0x00007f3d42b7ab7d in QETWidget::translateMouseEvent (this=0x2fcff00, event=<optimized out>) at kernel/qapplication_x11.cpp:4502
#40 0x00007f3d42b79929 in QApplication::x11ProcessEvent (this=0x7fff78d2b8b0, event=0x7fff78d2b580) at kernel/qapplication_x11.cpp:3625
#41 0x00007f3d42ba195d in QEventDispatcherX11::processEvents (this=0x259e740, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#42 0x00007f3d439a0e38 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#43 0x00007f3d439a10f6 in QEventLoop::exec (this=0x7fff78d2b7e0, flags=...) at kernel/qeventloop.cpp:204
#44 0x00007f3d439a622a in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#45 0x00007f3d483cad2b in kdemain (argc=<optimized out>, argv=0x7fff78d2b8b0) at /var/tmp/portage/kde-base/kwin-4.9.0/work/kwin-4.9.0/kwin/main.cpp:545
#46 0x00007f3d414af564 in __libc_start_main (main=0x400ac0 <main(int, char**)>, argc=2, ubp_av=0x7fff78d2bfb8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff78d2bfa8) at libc-start.c:226
#47 0x00000000004009a9 in _start ()

Possible duplicates by query: bug 303450.

Reported using DrKonqi