Bug 255498

Summary: Plasma crashed when drag and dropping the Ark widget within notification panel [QGraphicsLayoutItem::isLayout, QGraphicsLinearLayout::insertItem, Plasma::ExtenderGroup::dragMoveEvent]
Product: [Unmaintained] plasma4 Reporter: Anna Z. <siana.sg>
Component: notificationsAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED FIXED    
Severity: crash CC: asraniel, brettschneider.sven, brian.beck76, linuxhippy, martin.ruessler, plasma-bugs-null
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Anna Z. 2010-10-28 14:30:13 UTC 
Application: plasma-desktop (0.3)
KDE Platform Version: 4.5.1 (KDE 4.5.1)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-22-generic i686
Distribution: Ubuntu 10.10

-- Information about the crash:
What I was doing when the application crashed:

* started zipping a directory using Ark from Dolphin
* during progress, opened up the notifier widget. Within, a notification widget from Ark was found, displaying Ark icon, but no name, no textual content, and no progress information.
* by accident, i dragged the Ark widget around a bit. This made some empty space below Ark widget within notification widget.
* when i tried to drag the Ark widget into the empty space, Plasma crashed.

-- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb60a6a30 (LWP 1830))]

Thread 7 (Thread 0xac2b9b70 (LWP 1838)):
#0  0x004a3416 in __kernel_vsyscall ()
#1  0x00ec5de6 in __poll (fds=0xf5dff4, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#2  0x0487ba1b in g_poll () from /lib/libglib-2.0.so.0
#3  0x0486e43c in ?? () from /lib/libglib-2.0.so.0
#4  0x0486e848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#5  0x0363c59f in QEventDispatcherGlib::processEvents (this=0x887fc28, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#6  0x0360c609 in QEventLoop::processEvents (this=0xac2b91d0, flags=) at kernel/qeventloop.cpp:149
#7  0x0360ca8a in QEventLoop::exec (this=0xac2b91d0, flags=...) at kernel/qeventloop.cpp:201
#8  0x03508b7e in QThread::exec (this=0x886aeb8) at thread/qthread.cpp:490
#9  0x035eb35b in QInotifyFileSystemWatcherEngine::run (this=0x886aeb8) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x0350bdf9 in QThreadPrivate::start (arg=0x886aeb8) at thread/qthread_unix.cpp:266
#11 0x025e6ba8 in ?? () from /usr/lib/nvidia-current/libGL.so.1

Thread 6 (Thread 0xaacc4b70 (LWP 2255)):
#0  0x004a3416 in __kernel_vsyscall ()
#1  0x001b74dc in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:169
#2  0x00ee1dad in __pthread_cond_wait (cond=0x8a26858, mutex=0x8a26840) at forward.c:139
#3  0x0350c9c7 in wait (this=0x8a446e0, mutex=0x8a26158, time=4294967295) at thread/qwaitcondition_unix.cpp:88
#4  QWaitCondition::wait (this=0x8a446e0, mutex=0x8a26158, time=4294967295) at thread/qwaitcondition_unix.cpp:160
#5  0x003fe030 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x8a446c8, th=0x91e5798) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#6  0x004017dc in ThreadWeaver::WorkingHardState::waitForAvailableJob (this=0x8a263b0, th=0x91e5798) at ../../../threadweaver/Weaver/WorkingHardState.cpp:80
#7  0x003fd55b in ThreadWeaver::WeaverImpl::waitForAvailableJob (this=0x8a446c8, th=0x91e5798) at ../../../threadweaver/Weaver/WeaverImpl.cpp:356
#8  0x004018d2 in ThreadWeaver::WorkingHardState::applyForWork (this=0x8a263b0, th=0x91e5798) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#9  0x003fe533 in ThreadWeaver::WeaverImpl::applyForWork (this=0x8a446c8, th=0x91e5798, previous=0x0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:351
#10 0x004018f1 in ThreadWeaver::WorkingHardState::applyForWork (this=0x8a263b0, th=0x91e5798) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#11 0x003fe533 in ThreadWeaver::WeaverImpl::applyForWork (this=0x8a446c8, th=0x91e5798, previous=0x990ea70) at ../../../threadweaver/Weaver/WeaverImpl.cpp:351
#12 0x003ff95e in ThreadWeaver::ThreadRunHelper::run (this=0xaacc4234, parent=0x8a446c8, th=0x91e5798) at ../../../threadweaver/Weaver/Thread.cpp:87
#13 0x0040007b in ThreadWeaver::Thread::run (this=0x91e5798) at ../../../threadweaver/Weaver/Thread.cpp:142
#14 0x0350bdf9 in QThreadPrivate::start (arg=0x91e5798) at thread/qthread_unix.cpp:266
#15 0x025e6ba8 in ?? () from /usr/lib/nvidia-current/libGL.so.1

Thread 5 (Thread 0xabab8b70 (LWP 2256)):
#0  0x004a3416 in __kernel_vsyscall ()
#1  0x001b74dc in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:169
#2  0x00ee1dad in __pthread_cond_wait (cond=0x8a26858, mutex=0x8a26840) at forward.c:139
#3  0x0350c9c7 in wait (this=0x8a446e0, mutex=0x8a26158, time=4294967295) at thread/qwaitcondition_unix.cpp:88
#4  QWaitCondition::wait (this=0x8a446e0, mutex=0x8a26158, time=4294967295) at thread/qwaitcondition_unix.cpp:160
#5  0x003fe030 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x8a446c8, th=0x90360b0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#6  0x004017dc in ThreadWeaver::WorkingHardState::waitForAvailableJob (this=0x8a263b0, th=0x90360b0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:80
#7  0x003fd55b in ThreadWeaver::WeaverImpl::waitForAvailableJob (this=0x8a446c8, th=0x90360b0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:356
#8  0x004018d2 in ThreadWeaver::WorkingHardState::applyForWork (this=0x8a263b0, th=0x90360b0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#9  0x003fe533 in ThreadWeaver::WeaverImpl::applyForWork (this=0x8a446c8, th=0x90360b0, previous=0x90f46e0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:351
#10 0x003ff95e in ThreadWeaver::ThreadRunHelper::run (this=0xabab8234, parent=0x8a446c8, th=0x90360b0) at ../../../threadweaver/Weaver/Thread.cpp:87
#11 0x0040007b in ThreadWeaver::Thread::run (this=0x90360b0) at ../../../threadweaver/Weaver/Thread.cpp:142
#12 0x0350bdf9 in QThreadPrivate::start (arg=0x90360b0) at thread/qthread_unix.cpp:266
#13 0x025e6ba8 in ?? () from /usr/lib/nvidia-current/libGL.so.1

Thread 4 (Thread 0xa98a8b70 (LWP 2257)):
#0  0x004a3416 in __kernel_vsyscall ()
#1  0x001b74dc in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:169
#2  0x00ee1dad in __pthread_cond_wait (cond=0x8a26858, mutex=0x8a26840) at forward.c:139
#3  0x0350c9c7 in wait (this=0x8a446e0, mutex=0x8a26158, time=4294967295) at thread/qwaitcondition_unix.cpp:88
#4  QWaitCondition::wait (this=0x8a446e0, mutex=0x8a26158, time=4294967295) at thread/qwaitcondition_unix.cpp:160
#5  0x003fe030 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x8a446c8, th=0xaa342be8) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#6  0x004017dc in ThreadWeaver::WorkingHardState::waitForAvailableJob (this=0x8a263b0, th=0xaa342be8) at ../../../threadweaver/Weaver/WorkingHardState.cpp:80
#7  0x003fd55b in ThreadWeaver::WeaverImpl::waitForAvailableJob (this=0x8a446c8, th=0xaa342be8) at ../../../threadweaver/Weaver/WeaverImpl.cpp:356
#8  0x004018d2 in ThreadWeaver::WorkingHardState::applyForWork (this=0x8a263b0, th=0xaa342be8) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#9  0x003fe533 in ThreadWeaver::WeaverImpl::applyForWork (this=0x8a446c8, th=0xaa342be8, previous=0x0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:351
#10 0x004018f1 in ThreadWeaver::WorkingHardState::applyForWork (this=0x8a263b0, th=0xaa342be8) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#11 0x003fe533 in ThreadWeaver::WeaverImpl::applyForWork (this=0x8a446c8, th=0xaa342be8, previous=0x0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:351
#12 0x004018f1 in ThreadWeaver::WorkingHardState::applyForWork (this=0x8a263b0, th=0xaa342be8) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#13 0x003fe533 in ThreadWeaver::WeaverImpl::applyForWork (this=0x8a446c8, th=0xaa342be8, previous=0x0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:351
#14 0x004018f1 in ThreadWeaver::WorkingHardState::applyForWork (this=0x8a263b0, th=0xaa342be8) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#15 0x003fe533 in ThreadWeaver::WeaverImpl::applyForWork (this=0x8a446c8, th=0xaa342be8, previous=0x0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:351
#16 0x004018f1 in ThreadWeaver::WorkingHardState::applyForWork (this=0x8a263b0, th=0xaa342be8) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#17 0x003fe533 in ThreadWeaver::WeaverImpl::applyForWork (this=0x8a446c8, th=0xaa342be8, previous=0x0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:351
#18 0x004018f1 in ThreadWeaver::WorkingHardState::applyForWork (this=0x8a263b0, th=0xaa342be8) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#19 0x003fe533 in ThreadWeaver::WeaverImpl::applyForWork (this=0x8a446c8, th=0xaa342be8, previous=0x90e3be0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:351
#20 0x003ff95e in ThreadWeaver::ThreadRunHelper::run (this=0xa98a8234, parent=0x8a446c8, th=0xaa342be8) at ../../../threadweaver/Weaver/Thread.cpp:87
#21 0x0040007b in ThreadWeaver::Thread::run (this=0xaa342be8) at ../../../threadweaver/Weaver/Thread.cpp:142
#22 0x0350bdf9 in QThreadPrivate::start (arg=0xaa342be8) at thread/qthread_unix.cpp:266
#23 0x025e6ba8 in ?? () from /usr/lib/nvidia-current/libGL.so.1

Thread 3 (Thread 0xa90a7b70 (LWP 2258)):
#0  0x004a3416 in __kernel_vsyscall ()
#1  0x001b74dc in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:169
#2  0x00ee1dad in __pthread_cond_wait (cond=0x8a26858, mutex=0x8a26840) at forward.c:139
#3  0x0350c9c7 in wait (this=0x8a446e0, mutex=0x8a26158, time=4294967295) at thread/qwaitcondition_unix.cpp:88
#4  QWaitCondition::wait (this=0x8a446e0, mutex=0x8a26158, time=4294967295) at thread/qwaitcondition_unix.cpp:160
#5  0x003fe030 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x8a446c8, th=0x8ccb7b0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#6  0x004017dc in ThreadWeaver::WorkingHardState::waitForAvailableJob (this=0x8a263b0, th=0x8ccb7b0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:80
#7  0x003fd55b in ThreadWeaver::WeaverImpl::waitForAvailableJob (this=0x8a446c8, th=0x8ccb7b0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:356
#8  0x004018d2 in ThreadWeaver::WorkingHardState::applyForWork (this=0x8a263b0, th=0x8ccb7b0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#9  0x003fe533 in ThreadWeaver::WeaverImpl::applyForWork (this=0x8a446c8, th=0x8ccb7b0, previous=0x8b8a8b0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:351
#10 0x003ff95e in ThreadWeaver::ThreadRunHelper::run (this=0xa90a7234, parent=0x8a446c8, th=0x8ccb7b0) at ../../../threadweaver/Weaver/Thread.cpp:87
#11 0x0040007b in ThreadWeaver::Thread::run (this=0x8ccb7b0) at ../../../threadweaver/Weaver/Thread.cpp:142
#12 0x0350bdf9 in QThreadPrivate::start (arg=0x8ccb7b0) at thread/qthread_unix.cpp:266
#13 0x025e6ba8 in ?? () from /usr/lib/nvidia-current/libGL.so.1

Thread 2 (Thread 0xa84c0b70 (LWP 5985)):
#0  0x004a3416 in __kernel_vsyscall ()
#1  0x001b74dc in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:169
#2  0x00ee1dad in __pthread_cond_wait (cond=0x5f42770, mutex=0x5f42758) at forward.c:139
#3  0x05a3a3a5 in ?? () from /usr/lib/libQtWebKit.so.4
#4  0x05a3a481 in ?? () from /usr/lib/libQtWebKit.so.4
#5  0x025e6ba8 in ?? () from /usr/lib/nvidia-current/libGL.so.1

Thread 1 (Thread 0xb60a6a30 (LWP 1830)):
[KCrash Handler]
#7  QGraphicsLayoutItem::isLayout (this=0x872b478) at graphicsview/qgraphicslayoutitem.cpp:804
#8  0x01b7b20c in QGraphicsLinearLayout::insertItem (this=0x8b83be0, index=-1, item=0x872b478) at graphicsview/qgraphicslinearlayout.cpp:278
#9  0x00598b29 in Plasma::ExtenderGroup::dragMoveEvent (this=0x87eb880, event=0xbfc3f0d8) at ../../plasma/extenders/extendergroup.cpp:270
#10 0x0059887a in Plasma::ExtenderGroup::dragEnterEvent (this=0x87eb880, event=0xbfc3f0d8) at ../../plasma/extenders/extendergroup.cpp:233
#11 0x01b6b163 in QGraphicsItem::sceneEvent (this=0x87eb888, event=0xbfc3f0d8) at graphicsview/qgraphicsitem.cpp:6642
#12 0x01bc24d7 in QGraphicsWidget::sceneEvent (this=0x87eb880, event=0xbfc3f0d8) at graphicsview/qgraphicswidget.cpp:1173
#13 0x01b83569 in QGraphicsScenePrivate::sendEvent (this=0x80e30b0, item=0x87eb888, event=0xbfc3f0d8) at graphicsview/qgraphicsscene.cpp:1211
#14 0x01b83958 in QGraphicsScenePrivate::sendDragDropEvent (this=0x80e30b0, item=0x87eb888, dragDropEvent=0xbfc3f0d8) at graphicsview/qgraphicsscene.cpp:1240
#15 0x01b8a345 in QGraphicsScene::dragMoveEvent (this=0x80d9a20, event=0xbfc3f620) at graphicsview/qgraphicsscene.cpp:3662
#16 0x005716a4 in Plasma::Corona::dragMoveEvent (this=0x80d9a20, event=0xbfc3f620) at ../../plasma/corona.cpp:821
#17 0x01b9e41c in QGraphicsScene::event (this=0x80d9a20, event=0xbfc3f620) at graphicsview/qgraphicsscene.cpp:3389
#18 0x014b8fdc in QApplicationPrivate::notify_helper (this=0x80e6460, receiver=0x80d9a20, e=0xbfc3f620) at kernel/qapplication.cpp:4396
#19 0x014bf04e in QApplication::notify (this=0x80d7548, receiver=0x80d9a20, e=0xbfc3f620) at kernel/qapplication.cpp:3798
#20 0x011ae68a in KApplication::notify (this=0x80d7548, receiver=0x80d9a20, event=0xbfc3f620) at ../../kdeui/kernel/kapplication.cpp:310
#21 0x0360db3b in QCoreApplication::notifyInternal (this=0x80d7548, receiver=0x80d9a20, event=0xbfc3f620) at kernel/qcoreapplication.cpp:732
#22 0x01bbaac9 in sendEvent (this=0x885fdc0, event=0xbfc3fd80) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#23 QGraphicsView::dragMoveEvent (this=0x885fdc0, event=0xbfc3fd80) at graphicsview/qgraphicsview.cpp:3014
#24 0x01516d92 in QWidget::event (this=0x885fdc0, event=0xbfc3fd80) at kernel/qwidget.cpp:8385
#25 0x01938763 in QFrame::event (this=0x885fdc0, e=0xbfc3fd80) at widgets/qframe.cpp:557
#26 0x019d5a82 in QAbstractScrollArea::viewportEvent (this=0x0, e=0x87eb880) at widgets/qabstractscrollarea.cpp:1043
#27 0x01bb9ccb in QGraphicsView::viewportEvent (this=0x885fdc0, event=0xbfc3fd80) at graphicsview/qgraphicsview.cpp:2862
#28 0x019d84d5 in viewportEvent (this=0x881c9f0, o=0x882b8d8, e=0xbfc3fd80) at widgets/qabstractscrollarea_p.h:100
#29 QAbstractScrollAreaFilter::eventFilter (this=0x881c9f0, o=0x882b8d8, e=0xbfc3fd80) at widgets/qabstractscrollarea_p.h:116
#30 0x0360d29a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x80e6460, receiver=0x882b8d8, event=0xbfc3fd80) at kernel/qcoreapplication.cpp:847
#31 0x014b8fb9 in QApplicationPrivate::notify_helper (this=0x80e6460, receiver=0x882b8d8, e=0xbfc3fd80) at kernel/qapplication.cpp:4392
#32 0x014bf51f in QApplication::notify (this=0x80d7548, receiver=0x882b8d8, e=0xbfc3fd80) at kernel/qapplication.cpp:4202
#33 0x011ae68a in KApplication::notify (this=0x80d7548, receiver=0x882b8d8, event=0xbfc3fd80) at ../../kdeui/kernel/kapplication.cpp:310
#34 0x0360db3b in QCoreApplication::notifyInternal (this=0x80d7548, receiver=0x882b8d8, event=0xbfc3fd80) at kernel/qcoreapplication.cpp:732
#35 0x014c76ce in QCoreApplication::sendEvent (receiver=0x882b8d8, event=0x87eb880) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#36 0x0155b617 in handle_xdnd_position (w=<value optimized out>, xe=<value optimized out>, passive=false) at kernel/qdnd_x11.cpp:929
#37 0x0155ccee in QDragManager::move (this=0x91bd658, globalPos=...) at kernel/qdnd_x11.cpp:1668
#38 0x01560590 in QDragManager::drag (this=0x91bd658, o=0xa316cb0) at kernel/qdnd_x11.cpp:1972
#39 0x014d0d4e in QDrag::exec (this=0xa316cb0, supportedActions=..., defaultDropAction=Qt::IgnoreAction) at kernel/qdrag.cpp:284
#40 0x014d0e04 in QDrag::exec (this=0xa316cb0, supportedActions=...) at kernel/qdrag.cpp:239
#41 0x005a16c3 in Plasma::ExtenderItem::mouseMoveEvent (this=0x95dc918, event=0xbfc40a84) at ../../plasma/extenders/extenderitem.cpp:671
#42 0x01b6b210 in QGraphicsItem::sceneEvent (this=0x95dc920, event=0xbfc40a84) at graphicsview/qgraphicsitem.cpp:6663
#43 0x01bc24d7 in QGraphicsWidget::sceneEvent (this=0x95dc918, event=0xbfc40a84) at graphicsview/qgraphicswidget.cpp:1173
#44 0x01b83569 in QGraphicsScenePrivate::sendEvent (this=0x80e30b0, item=0x95dc920, event=0xbfc40a84) at graphicsview/qgraphicsscene.cpp:1211
#45 0x01b858b3 in QGraphicsScenePrivate::sendMouseEvent (this=0x80e30b0, mouseEvent=0xbfc40a84) at graphicsview/qgraphicsscene.cpp:1285
#46 0x01b89e0d in QGraphicsScene::mouseMoveEvent (this=0x80d9a20, mouseEvent=0xbfc40a84) at graphicsview/qgraphicsscene.cpp:4085
#47 0x01b9e57d in QGraphicsScene::event (this=0x80d9a20, event=0xbfc40a84) at graphicsview/qgraphicsscene.cpp:3437
#48 0x014b8fdc in QApplicationPrivate::notify_helper (this=0x80e6460, receiver=0x80d9a20, e=0xbfc40a84) at kernel/qapplication.cpp:4396
#49 0x014bf04e in QApplication::notify (this=0x80d7548, receiver=0x80d9a20, e=0xbfc40a84) at kernel/qapplication.cpp:3798
#50 0x011ae68a in KApplication::notify (this=0x80d7548, receiver=0x80d9a20, event=0xbfc40a84) at ../../kdeui/kernel/kapplication.cpp:310
#51 0x0360db3b in QCoreApplication::notifyInternal (this=0x80d7548, receiver=0x80d9a20, event=0xbfc40a84) at kernel/qcoreapplication.cpp:732
#52 0x014b8b9e in sendSpontaneousEvent (receiver=0x80d9a20, event=0x87eb880) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#53 qt_sendSpontaneousEvent (receiver=0x80d9a20, event=0x87eb880) at kernel/qapplication.cpp:5388
#54 0x01bbc282 in QGraphicsViewPrivate::mouseMoveEventHandler (this=0x885fdf0, event=0xbfc412d0) at graphicsview/qgraphicsview.cpp:647
#55 0x01bbc4c6 in QGraphicsView::mouseMoveEvent (this=0x885fdc0, event=0xbfc412d0) at graphicsview/qgraphicsview.cpp:3272
#56 0x01516caa in QWidget::event (this=0x885fdc0, event=0xbfc412d0) at kernel/qwidget.cpp:8172
#57 0x01938763 in QFrame::event (this=0x885fdc0, e=0xbfc412d0) at widgets/qframe.cpp:557
#58 0x019d5a82 in QAbstractScrollArea::viewportEvent (this=0x0, e=0x87eb880) at widgets/qabstractscrollarea.cpp:1043
#59 0x01bb9ccb in QGraphicsView::viewportEvent (this=0x885fdc0, event=0xbfc412d0) at graphicsview/qgraphicsview.cpp:2862
#60 0x019d84d5 in viewportEvent (this=0x881c9f0, o=0x882b8d8, e=0xbfc412d0) at widgets/qabstractscrollarea_p.h:100
#61 QAbstractScrollAreaFilter::eventFilter (this=0x881c9f0, o=0x882b8d8, e=0xbfc412d0) at widgets/qabstractscrollarea_p.h:116
#62 0x0360d29a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x80e6460, receiver=0x882b8d8, event=0xbfc412d0) at kernel/qcoreapplication.cpp:847
#63 0x014b8fb9 in QApplicationPrivate::notify_helper (this=0x80e6460, receiver=0x882b8d8, e=0xbfc412d0) at kernel/qapplication.cpp:4392
#64 0x014bfc2e in QApplication::notify (this=0x80d7548, receiver=0x882b8d8, e=0xbfc412d0) at kernel/qapplication.cpp:3959
#65 0x011ae68a in KApplication::notify (this=0x80d7548, receiver=0x882b8d8, event=0xbfc412d0) at ../../kdeui/kernel/kapplication.cpp:310
#66 0x0360db3b in QCoreApplication::notifyInternal (this=0x80d7548, receiver=0x882b8d8, event=0xbfc412d0) at kernel/qcoreapplication.cpp:732
#67 0x014be094 in sendEvent (receiver=0x882b8d8, event=0xbfc412d0, alienWidget=0x882b8d8, nativeWidget=0x881f858, buttonDown=0x1e533c0, lastMouseReceiver=..., spontaneous=true) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#68 QApplicationPrivate::sendMouseEvent (receiver=0x882b8d8, event=0xbfc412d0, alienWidget=0x882b8d8, nativeWidget=0x881f858, buttonDown=0x1e533c0, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3058
#69 0x0154cd10 in QETWidget::translateMouseEvent (this=0x881f858, event=0xbfc417ec) at kernel/qapplication_x11.cpp:4403
#70 0x0154c151 in QApplication::x11ProcessEvent (this=0x80d7548, event=0xbfc417ec) at kernel/qapplication_x11.cpp:3414
#71 0x0157b36a in x11EventSourceDispatch (s=0x80e96a8, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#72 0x0486a855 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#73 0x0486e668 in ?? () from /lib/libglib-2.0.so.0
#74 0x0486e848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#75 0x0363c565 in QEventDispatcherGlib::processEvents (this=0x8082ce8, flags=...) at kernel/qeventdispatcher_glib.cpp:415
#76 0x0157abe5 in QGuiEventDispatcherGlib::processEvents (this=0x8082ce8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#77 0x0360c609 in QEventLoop::processEvents (this=0xbfc41ae4, flags=) at kernel/qeventloop.cpp:149
#78 0x0360ca8a in QEventLoop::exec (this=0xbfc41ae4, flags=...) at kernel/qeventloop.cpp:201
#79 0x0361100f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#80 0x014b7e07 in QApplication::exec () at kernel/qapplication.cpp:3672
#81 0x0014086e in kdemain (argc=1, argv=0xbfc41cf4) at ../../../../plasma/desktop/shell/main.cpp:118
#82 0x080485bb in main (argc=1, argv=0xbfc41cf4) at plasma-desktop_dummy.cpp:3

Reported using DrKonqi
Comment 1 Aaron J. Seigo 2010-12-14 02:28:30 UTC 
*** Bug 254844 has been marked as a duplicate of this bug. ***
Comment 2 Aaron J. Seigo 2010-12-14 02:28:38 UTC 
*** Bug 256245 has been marked as a duplicate of this bug. ***
Comment 3 Marco Martin 2010-12-18 12:54:59 UTC 
*** Bug 259449 has been marked as a duplicate of this bug. ***
Comment 4 Martin 2011-12-03 17:23:33 UTC 
Could not reproduce using KDE 4.7.3. Feel free to reopen as necessary.