Bug 182482

Thanks for taking the time to report this bug.
Unfortunately, that backtrace is missing some elements that will help a lot to solve the problem, so it will be hard for the developers to fix that crash. 
Can you get us a backtrace with debugging symbols? 
Please see http://techbase.kde.org/Development/Tutorials/Debugging/How_to_create_useful_crash_reports for more information on how to do so. 

Thanks in advance!

This is similar to bug 176014, but it's happing on drawing the Meter widget instead of the Clock hand in a plasmoid. Anyways, it seems more like a Qt bug.
What is your Qt version (patches applied?)

I'm using latest debian's Qt packages in the experimental repository. From the libqt4-core changelog:

  +++ Changes by Armin Berres:

  * Fix offsets in all patches.
  * Add qt-copy patches:
    - 0255-qtreeview-selection-columns-hidden.diff
    - 0256-fix-recursive-backingstore-sync-crash.diff
    - 0257-qurl-validate-speedup.diff
    - 0260-fix-qgraphicswidget-deletionclearFocus.diff
    - 0261-sync-before-reset-errorhandler.patch
    - 0262-fix-treeview-animation-crash.diff

Hope this helps. Regards.

Surely not the same bug, but it has crashed again just a moment ago. The computer seems to run more and more slowly as time goes, until plasma crashes. The backtrace follows.

Hope his helps. Regards.

Application: Plasma Workspace (plasma), signal SIGSEGV
[Current thread is 0 (LWP 4438)]

Thread 3 (Thread 0xa9c76b90 (LWP 4455)):
#0  0xb7fc5424 in __kernel_vsyscall ()
#1  0xb5841025 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0
#2  0xb7ed17fd in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libc.so.6
#3  0xb6931542 in QWaitCondition::wait (this=0x930d020, mutex=0x930d01c, time=4294967295) at thread/qwaitcondition_unix.cpp:82
#4  0xb5a25312 in QHostInfoAgent::run (this=0x930d010) at kernel/qhostinfo.cpp:241
#5  0xb693052e in QThreadPrivate::start (arg=0x930d010) at thread/qthread_unix.cpp:185
#6  0xb583d4c0 in start_thread () from /lib/i686/cmov/libpthread.so.0
#7  0xb7ec36de in clone () from /lib/i686/cmov/libc.so.6

Thread 2 (Thread 0xa4fa3b90 (LWP 4476)):
#0  0xb7fc5424 in __kernel_vsyscall ()
#1  0xb5841025 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0
#2  0xb7ed17fd in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libc.so.6
#3  0xb6931542 in QWaitCondition::wait (this=0x927b1b8, mutex=0x927b1b4, time=4294967295) at thread/qwaitcondition_unix.cpp:82
#4  0xa9de04a2 in RenderThread::run (this=0x927b1ac) at ../../../../plasma/wallpapers/image/renderthread.cpp:91
#5  0xb693052e in QThreadPrivate::start (arg=0x927b1ac) at thread/qthread_unix.cpp:185
#6  0xb583d4c0 in start_thread () from /lib/i686/cmov/libpthread.so.0
#7  0xb7ec36de in clone () from /lib/i686/cmov/libc.so.6

Thread 1 (Thread 0xb544f6c0 (LWP 4438)):
[KCrash Handler]
#6  QImage::scanLine (this=0xbf9dfff8, i=0) at image/qimage.cpp:1751
#7  0xb6d38840 in QWidgetPrivate::setWindowIcon_sys (this=0xac06f88, forceReset=false) at kernel/qwidget_x11.cpp:1226
#8  0xb6d042fb in QWidget::create (this=0x9f4ae80, window=0, initializeWindow=<value optimized out>, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1267
#9  0xb6d09e4e in QWidget::setVisible (this=0x9f4ae80, visible=true) at kernel/qwidget.cpp:6519
#10 0xb7279076 in QGraphicsProxyWidgetPrivate::setWidget_helper (this=0xabcccc0, newWidget=0x9f4ae80, autoShow=true) at ../../include/QtGui/../../src/gui/kernel/qwidget.h:464
#11 0xb7279483 in QGraphicsProxyWidget::setWidget (this=0xab96f20, widget=0x9f4ae80) at graphicsview/qgraphicsproxywidget.cpp:549
#12 0xb7d31cbb in Label (this=0xab96f20, parent=0x92a7248) at ../../plasma/widgets/label.cpp:99
#13 0xb7cd6053 in Plasma::ExtenderPrivate::updateEmptyExtenderLabel (this=0x92f1ca8) at ../../plasma/extender.cpp:488
#14 0xb7cd6229 in Plasma::Extender::itemRemovedEvent (this=0x92a7248, item=0xa1f6980) at ../../plasma/extender.cpp:247
#15 0xb7cd6cc2 in Plasma::ExtenderPrivate::removeExtenderItem (this=0x92f1ca8, item=0xa1f6980) at ../../plasma/extender.cpp:357
#16 0xb7cdc458 in Plasma::ExtenderItem::destroy (this=0xa1f6980) at ../../plasma/extenderitem.cpp:379
#17 0xa9ebd884 in NotificationWidgetPrivate::destroy (this=0xabc9548) at ../../../../plasma/applets/systemtray/ui/notificationwidget.cpp:220
#18 0xa9ebd910 in NotificationWidget::qt_metacall (this=0xabc94b8, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0xbf9e045c) at ./notificationwidget.moc:68
#19 0xb6a34be0 in QMetaObject::activate (sender=0x9ced858, from_signal_index=6, to_signal_index=7, argv=0xbf9e045c) at kernel/qobject.cpp:3031
#20 0xb6a34fe0 in QMetaObject::activate (sender=0x9ced858, m=0xa9ec665c, from_local_signal_index=2, to_local_signal_index=3, argv=0xbf9e045c) at kernel/qobject.cpp:3121
#21 0xa9ea165b in SystemTray::Notification::destroyed (this=0x9ced858, _t1=0x9ced858) at ./notification.moc:96
#22 0xa9ea1da1 in ~Notification (this=0x9ced858) at ../../../../plasma/applets/systemtray/core/notification.cpp:62
#23 0xa9eb0139 in ~DBusNotification (this=0x9ced858) at ../../../../plasma/applets/systemtray/protocols/notifications/dbusnotification.cpp:38
#24 0xb6a2df6c in qDeleteInEventHandler (o=0x0) at kernel/qobject.cpp:3659
#25 0xb6a2f923 in QObject::event (this=0x9ced858, e=0x9cf4bc8) at kernel/qobject.cpp:1139
#26 0xb6cae79c in QApplicationPrivate::notify_helper (this=0x90ac668, receiver=0x9ced858, e=0x9cf4bc8) at kernel/qapplication.cpp:3803
#27 0xb6cb661e in QApplication::notify (this=0x908fc68, receiver=0x9ced858, e=0x9cf4bc8) at kernel/qapplication.cpp:3393
#28 0xb786977d in KApplication::notify (this=0x908fc68, receiver=0x9ced858, event=0x9cf4bc8) at ../../kdeui/kernel/kapplication.cpp:307
#29 0xb6a200e1 in QCoreApplication::notifyInternal (this=0x908fc68, receiver=0x9ced858, event=0x9cf4bc8) at kernel/qcoreapplication.cpp:587
#30 0xb6a20d65 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x907e070) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:209
#31 0xb6a20f5d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1091
#32 0xb6a4a99f in postEventSourceDispatch (s=0x90a9140) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:214
#33 0xb5889398 in IA__g_main_context_dispatch (context=0x90ac298) at /build/buildd/glib2.0-2.18.4/glib/gmain.c:2144
#34 0xb588ca33 in g_main_context_iterate (context=0x90ac298, block=1, dispatch=1, self=0x90ab4d8) at /build/buildd/glib2.0-2.18.4/glib/gmain.c:2778
#35 0xb588cbf1 in IA__g_main_context_iteration (context=0x90ac298, may_block=1) at /build/buildd/glib2.0-2.18.4/glib/gmain.c:2841
#36 0xb6a4a5e8 in QEventDispatcherGlib::processEvents (this=0x90a5ea8, flags={i = -1080161688}) at kernel/qeventdispatcher_glib.cpp:319
#37 0xb6d47d75 in QGuiEventDispatcherGlib::processEvents (this=0x90a5ea8, flags={i = -1080161640}) at kernel/qguieventdispatcher_glib.cpp:198
#38 0xb6a1e7aa in QEventLoop::processEvents (this=0xbf9e0b10, flags={i = -1080161576}) at kernel/qeventloop.cpp:143
#39 0xb6a1e96a in QEventLoop::exec (this=0xbf9e0b10, flags={i = -1080161512}) at kernel/qeventloop.cpp:194
#40 0xb6a21025 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:845
#41 0xb6cae617 in QApplication::exec () at kernel/qapplication.cpp:3331
#42 0xb7f6bc16 in kdemain (argc=1, argv=0xbf9e0cc4) at ../../../../plasma/shells/desktop/main.cpp:54
#43 0x08048592 in main (argc=) at plasma_qgv_dummy.cpp:3

I dont know if this is the same bug, but plasma seems to crash from time to time for me too. 

Here is a sample stacktrace after deleting a mail in kmail.

Here is what I am running :
Qt: 4.4.3
KDE: 4.2.00 (KDE 4.2.0)
kde4-config: 1.0

I add Firefox, Konsole and a few other apps running:
Application : Espace de travail Plasma (plasma), signal SIGSEGV
[Current thread is 1 (Thread 0xb7f85790 (LWP 3676))]

Thread 4 (Thread 0x8d0db90 (LWP 3681)):
#0  0x0021d424 in __kernel_vsyscall ()
#1  0x00204105 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x03a937a2 in QWaitConditionPrivate::wait () at thread/qwaitcondition_unix.cpp:82
#3  QWaitCondition::wait (this=0xa4c8730, mutex=0xa4c872c, time=4294967295) at thread/qwaitcondition_unix.cpp:154
#4  0x07711a72 in QHostInfoAgent::run (this=0xa4c8720) at kernel/qhostinfo.cpp:241
#5  0x03a9275e in QThreadPrivate::start (arg=0xa4c8720) at thread/qthread_unix.cpp:185
#6  0x0020051f in start_thread () from /lib/libpthread.so.0
#7  0x0589a04e in clone () from /lib/libc.so.6

Thread 3 (Thread 0xacd47b90 (LWP 3683)):
#0  0x0021d424 in __kernel_vsyscall ()
#1  0x058923d1 in select () from /lib/libc.so.6
#2  0x03b62627 in QProcessManager::run (this=0x9f6f5c0) at io/qprocess_unix.cpp:301
#3  0x03a9275e in QThreadPrivate::start (arg=0x9f6f5c0) at thread/qthread_unix.cpp:185
#4  0x0020051f in start_thread () from /lib/libpthread.so.0
#5  0x0589a04e in clone () from /lib/libc.so.6

Thread 2 (Thread 0xac346b90 (LWP 3687)):
#0  0x0021d424 in __kernel_vsyscall ()
#1  0x00204105 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x03a937a2 in QWaitConditionPrivate::wait () at thread/qwaitcondition_unix.cpp:82
#3  QWaitCondition::wait (this=0xa276240, mutex=0xa27623c, time=4294967295) at thread/qwaitcondition_unix.cpp:154
#4  0x025badca in ?? () from /usr/lib/kde4/plasma_wallpaper_image.so
#5  0x03a9275e in QThreadPrivate::start (arg=0xa276234) at thread/qthread_unix.cpp:185
#6  0x0020051f in start_thread () from /lib/libpthread.so.0
#7  0x0589a04e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb7f85790 (LWP 3676)):
[KCrash Handler]
#6  0x03b98b91 in QMetaObject::activate (sender=0xa996968, m=0x7799f80, local_signal_index=0, argv=0xbfab019c) at kernel/qobject.cpp:3097
#7  0x076ce123 in QHttp::stateChanged (this=0xa996968, _t1=6) at .moc/release-shared/moc_qhttp.cpp:135
#8  0x076ce15a in QHttpPrivate::setState (this=0xa99c118, s=6) at access/qhttp.cpp:2965
#9  0x076ce56b in QHttpPrivate::closeConn (this=0xa99c118) at access/qhttp.cpp:2976
#10 0x076d5795 in QHttpPrivate::_q_slotError (this=0xa99c118, err=QAbstractSocket::NetworkError) at access/qhttp.cpp:2607
#11 0x076d8879 in QHttp::qt_metacall (this=0x9f9bbc8, _c=QMetaObject::InvokeMetaMethod, _id=16, _a=0xbfab03dc) at .moc/release-shared/moc_qhttp.cpp:120
#12 0x03b97df0 in QMetaObject::activate (sender=0xaa23f80, from_signal_index=12, to_signal_index=12, argv=0xbfab03dc) at kernel/qobject.cpp:3031
#13 0x03b98b72 in QMetaObject::activate (sender=0xaa23f80, m=0x779ae70, local_signal_index=4, argv=0xbfab03dc) at kernel/qobject.cpp:3101
#14 0x07727033 in QAbstractSocket::error (this=0xaa23f80, _t1=QAbstractSocket::NetworkError) at .moc/release-shared/moc_qabstractsocket.cpp:146
#15 0x0774318e in QSslSocketPrivate::_q_errorSlot (this=0xaa5da98, error=QAbstractSocket::NetworkError) at ssl/qsslsocket.cpp:1987
#16 0x0774639f in QSslSocket::qt_metacall (this=0xaa23f80, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbfab052c) at .moc/release-shared/moc_qsslsocket.cpp:112
#17 0x03b97df0 in QMetaObject::activate (sender=0xa7de100, from_signal_index=12, to_signal_index=12, argv=0xbfab052c) at kernel/qobject.cpp:3031
#18 0x03b98b72 in QMetaObject::activate (sender=0xa7de100, m=0x779ae70, local_signal_index=4, argv=0xbfab052c) at kernel/qobject.cpp:3101
#19 0x07727033 in QAbstractSocket::error (this=0xa7de100, _t1=QAbstractSocket::NetworkError) at .moc/release-shared/moc_qabstractsocket.cpp:146
#20 0x07728a46 in QAbstractSocketPrivate::_q_connectToNextAddress (this=0xaa5dc48) at socket/qabstractsocket.cpp:797
#21 0x07728c32 in QAbstractSocketPrivate::_q_testConnection (this=0xaa5dc48) at socket/qabstractsocket.cpp:912
#22 0x0772a548 in QAbstractSocketPrivate::canWriteNotification (this=0xaa5dc48) at socket/qabstractsocket.cpp:614
#23 0x0771a26b in QAbstractSocketEngine::writeNotification (this=0xaa2e288) at socket/qabstractsocketengine.cpp:142
#24 0x0771b556 in QWriteNotifier::event (this=0xa7f1b78, e=0xbfab0980) at socket/qnativesocketengine.cpp:997
#25 0x03ee768c in QApplicationPrivate::notify_helper (this=0x9f6c138, receiver=0xa7f1b78, e=0xbfab0980) at kernel/qapplication.cpp:3803
#26 0x03eef4ce in QApplication::notify (this=0x9f5f3e0, receiver=0xa7f1b78, e=0xbfab0980) at kernel/qapplication.cpp:3393
#27 0x00f81fdd in KApplication::notify () from /usr/lib/libkdeui.so.5
#28 0x03b831c1 in QCoreApplication::notifyInternal (this=0x9f5f3e0, receiver=0xa7f1b78, event=0xbfab0980) at kernel/qcoreapplication.cpp:587
#29 0x03bada8a in QCoreApplication::sendEvent () at ../../src/corelib/kernel/qcoreapplication.h:209
#30 socketNotifierSourceDispatch (source=0x9f6b308) at kernel/qeventdispatcher_glib.cpp:105
#31 0x03999238 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#32 0x0399c8e3 in ?? () from /lib/libglib-2.0.so.0
#33 0x0399caa1 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#34 0x03bad7f8 in QEventDispatcherGlib::processEvents (this=0x9f67f48, flags={i = 4}) at kernel/qeventdispatcher_glib.cpp:319
#35 0x03f80515 in QGuiEventDispatcherGlib::processEvents (this=0x9f67f48, flags={i = 4}) at kernel/qguieventdispatcher_glib.cpp:198
#36 0x03b8188a in QEventLoop::processEvents (this=0xbfab0b80, flags={i = 4}) at kernel/qeventloop.cpp:143
#37 0x03b81a4a in QEventLoop::exec (this=0xbfab0b80, flags={i = 0}) at kernel/qeventloop.cpp:194
#38 0x03b84105 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:845
#39 0x03ee7507 in QApplication::exec () at kernel/qapplication.cpp:3331
#40 0x00bf9e46 in kdemain () from /usr/lib/libkdeinit4_plasma.so
#41 0x080486f2 in _start ()

Adrien

@Adrien: are you using some Google Gadgets plasmoid. If you are, your crash is probably a duplicate of bug 182961. Anyways, your crash is unrelated to the original reported here. Thanks

(In reply to comment #6)
> @Adrien: are you using some Google Gadgets plasmoid. If you are, your crash is
> probably a duplicate of bug 182961. Anyways, your crash is unrelated to the
> original reported here. Thanks
> 

Yes, I was using the "Analog Clock" from google. I hope, this will solve the problem.

I have just suffered another crash. It seem related to the second one I reported. It has happened when I pressed the "Device Notifier" icon after connecting an external USB HD. This is the backtrace:

Application: Plasma Workspace (plasma), signal SIGSEGV
[Current thread is 0 (LWP 4617)]

Thread 3 (Thread 0xa9c81b90 (LWP 4618)):
#0  0xb7f8d424 in __kernel_vsyscall ()
#1  0xb5808025 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0
#2  0xb7e987fd in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libc.so.6
#3  0xb68f8542 in QWaitCondition::wait (this=0x957b7a0, mutex=0x957b79c, time=4294967295) at thread/qwaitcondition_unix.cpp:82
#4  0xb59ec312 in QHostInfoAgent::run (this=0x957b790) at kernel/qhostinfo.cpp:241
#5  0xb68f752e in QThreadPrivate::start (arg=0x957b790) at thread/qthread_unix.cpp:185
#6  0xb58044c0 in start_thread () from /lib/i686/cmov/libpthread.so.0
#7  0xb7e8a6de in clone () from /lib/i686/cmov/libc.so.6

Thread 2 (Thread 0xa92ddb90 (LWP 4624)):
#0  0xb7f8d424 in __kernel_vsyscall ()
#1  0xb5808025 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0
#2  0xb7e987fd in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libc.so.6
#3  0xb68f8542 in QWaitCondition::wait (this=0x9410a80, mutex=0x9410a7c, time=4294967295) at thread/qwaitcondition_unix.cpp:82
#4  0xa9d914a2 in RenderThread::run (this=0x9410a74) at ../../../../plasma/wallpapers/image/renderthread.cpp:91
#5  0xb68f752e in QThreadPrivate::start (arg=0x9410a74) at thread/qthread_unix.cpp:185
#6  0xb58044c0 in start_thread () from /lib/i686/cmov/libpthread.so.0
#7  0xb7e8a6de in clone () from /lib/i686/cmov/libc.so.6

Thread 1 (Thread 0xb54166c0 (LWP 4617)):
[KCrash Handler]
#6  QImage::scanLine (this=0xbf9a6518, i=0) at image/qimage.cpp:1751
#7  0xb6cff840 in QWidgetPrivate::setWindowIcon_sys (this=0x936bcc0, forceReset=false) at kernel/qwidget_x11.cpp:1226
#8  0xb6ccb2fb in QWidget::create (this=0x936e808, window=0, initializeWindow=<value optimized out>, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1267
#9  0xb6cc7123 in QWidgetPrivate::createWinId (this=0x936bcc0, winid=0) at kernel/qwidget.cpp:2014
#10 0xb6ccb8a9 in QWidget::winId (this=0x936e808) at kernel/qwidget.cpp:1977
#11 0xb7ccaac3 in Plasma::WindowPreview::setInfo (this=0x93691d8) at ../../plasma/private/windowpreview.cpp:117
#12 0xb7cc956c in Plasma::ToolTip::prepareShowing (this=0x936e808) at ../../plasma/private/tooltip.cpp:249
#13 0xb7ce6158 in Plasma::ToolTipManager::setContent (this=0x936e2f8, widget=0x94333c0, data=@0xbf9a6744) at ../../plasma/tooltipmanager.cpp:220
#14 0xaa2ab3e6 in DeviceNotifier::toolTipAboutToShow (this=0x94333c0) at ../../../../plasma/applets/devicenotifier/devicenotifier.cpp:230
#15 0xaa2ae5fb in DeviceNotifier::qt_metacall (this=0x94333c0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbf9a6a6c) at ./devicenotifier.moc:74
#16 0xb69efc5c in QMetaObject::invokeMethod (obj=0x94333c0, member=0xb7d8519b "toolTipAboutToShow", type=Qt::QueuedConnection, ret=
        {<QGenericArgument> = {_data = 0x0, _name = 0x0}, <No data fields>}, val0={_data = 0x0, _name = 0x0}, val1={_data = 0x0, _name = 0x0}, val2={_data = 0x0, _name = 0x0}, val3=
      {_data = 0x0, _name = 0x0}, val4={_data = 0x0, _name = 0x0}, val5={_data = 0x0, _name = 0x0}, val6={_data = 0x0, _name = 0x0}, val7={_data = 0x0, _name = 0x0}, val8={_data = 0x0, _name = 0x0}, 
    val9={_data = 0x0, _name = 0x0}) at kernel/qmetaobject.cpp:984
#17 0xb7ce6c86 in Plasma::ToolTipManagerPrivate::showToolTip (this=0x936e840) at /usr/include/qt4/QtCore/qobjectdefs.h:382
#18 0xb7ce6e78 in Plasma::ToolTipManager::qt_metacall (this=0x936e2f8, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbf9a6c28) at ./tooltipmanager.moc:68
#19 0xb69fbbe0 in QMetaObject::activate (sender=0x93c5c30, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3031
#20 0xb69fc962 in QMetaObject::activate (sender=0x93c5c30, m=0xb6aca0c4, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3101
#21 0xb6a36867 in QTimer::timeout (this=0x93c5c30) at .moc/release-shared/moc_qtimer.cpp:126
#22 0xb6a0258e in QTimer::timerEvent (this=0x93c5c30, e=0xbf9a70bc) at kernel/qtimer.cpp:257
#23 0xb69f66bf in QObject::event (this=0x93c5c30, e=0xbf9a70bc) at kernel/qobject.cpp:1120
#24 0xb6c7579c in QApplicationPrivate::notify_helper (this=0x92ce100, receiver=0x93c5c30, e=0xbf9a70bc) at kernel/qapplication.cpp:3803
#25 0xb6c7d61e in QApplication::notify (this=0x92b4c68, receiver=0x93c5c30, e=0xbf9a70bc) at kernel/qapplication.cpp:3393
#26 0xb783077d in KApplication::notify (this=0x92b4c68, receiver=0x93c5c30, event=0xbf9a70bc) at ../../kdeui/kernel/kapplication.cpp:307
#27 0xb69e70e1 in QCoreApplication::notifyInternal (this=0x92b4c68, receiver=0x93c5c30, event=0xbf9a70bc) at kernel/qcoreapplication.cpp:587
#28 0xb6a15041 in QTimerInfoList::activateTimers (this=0x92d2f34) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:209
#29 0xb6a11690 in timerSourceDispatch (source=0x92d2f00) at kernel/qeventdispatcher_glib.cpp:160
#30 0xb5850398 in IA__g_main_context_dispatch (context=0x92d07b8) at /build/buildd/glib2.0-2.18.4/glib/gmain.c:2144
#31 0xb5853a33 in g_main_context_iterate (context=0x92d07b8, block=1, dispatch=1, self=0x92d0510) at /build/buildd/glib2.0-2.18.4/glib/gmain.c:2778
#32 0xb5853bf1 in IA__g_main_context_iteration (context=0x92d07b8, may_block=1) at /build/buildd/glib2.0-2.18.4/glib/gmain.c:2841
#33 0xb6a115e8 in QEventDispatcherGlib::processEvents (this=0x92caeb8, flags={i = -1080397256}) at kernel/qeventdispatcher_glib.cpp:319
#34 0xb6d0ed75 in QGuiEventDispatcherGlib::processEvents (this=0x92caeb8, flags={i = -1080397208}) at kernel/qguieventdispatcher_glib.cpp:198
#35 0xb69e57aa in QEventLoop::processEvents (this=0xbf9a72e0, flags={i = -1080397144}) at kernel/qeventloop.cpp:143
#36 0xb69e596a in QEventLoop::exec (this=0xbf9a72e0, flags={i = -1080397080}) at kernel/qeventloop.cpp:194
#37 0xb69e8025 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:845
#38 0xb6c75617 in QApplication::exec () at kernel/qapplication.cpp:3331
#39 0xb7f32c16 in kdemain (argc=1, argv=0xbf9a7494) at ../../../../plasma/shells/desktop/main.cpp:54
#40 0x08048592 in main (argc=) at plasma_qgv_dummy.cpp:3

Thank you and best regards.

@Jose: it's better to not mix different crashes/backtraces in one report. Your new crash seems similar to the ones in the following list:
http://techbase.kde.org/Contribute/Bugsquad/Bug_Triage_of_Common_Issues_in_kdelibs#QImage::scanLine.28.29_QWidgetPrivate::setWindowIcon_sys.28.29_crashes_::_.28may_be_related_to_http:.2F.2Ftrolltech.com.2Fdeveloper.2Ftask-tracker.2Findex_html.3Fmethod.3Dentry.26id.3D233839.29

*** This bug has been marked as a duplicate of bug 183798 ***