Application: plasma-desktop (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.4
Operating System: Linux 3.11.0-12-generic x86_64
Distribution: Ubuntu 13.10

-- Information about the crash:
- What I was doing when the application crashed:
(I have 2 screens). I started firefox; nothing else, then KDE crashed and restarted immediately.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7b08ed47c0 (LWP 2392))]

Thread 5 (Thread 0x7f7ae7fa6700 (LWP 2393)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7b01b7306b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f7b01b730a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f7afc22df6e in start_thread (arg=0x7f7ae7fa6700) at pthread_create.c:311
#4  0x00007f7b087c09cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f7a5c9d5700 (LWP 2394)):
#0  0x00007f7afbb22ce0 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7afbb235c3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7afbb237ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7b0538ca76 in QEventDispatcherGlib::processEvents (this=0x7f7a580008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f7b0535e5ef in QEventLoop::processEvents (this=this@entry=0x7f7a5c9d4d70, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f7b0535e8e5 in QEventLoop::exec (this=this@entry=0x7f7a5c9d4d70, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f7b0525d88f in QThread::exec (this=this@entry=0x3b9c4c0) at thread/qthread.cpp:542
#7  0x00007f7b0533fd13 in QInotifyFileSystemWatcherEngine::run (this=0x3b9c4c0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f7b0525ff2f in QThreadPrivate::start (arg=0x3b9c4c0) at thread/qthread_unix.cpp:338
#9  0x00007f7afc22df6e in start_thread (arg=0x7f7a5c9d5700) at pthread_create.c:311
#10 0x00007f7b087c09cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f7a5736e700 (LWP 2395)):
#0  0x00007f7afbb630ed in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7afbb633c9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7afbb235b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7afbb237ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7b0538ca76 in QEventDispatcherGlib::processEvents (this=0x7f7a500008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f7b0535e5ef in QEventLoop::processEvents (this=this@entry=0x7f7a5736dd70, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f7b0535e8e5 in QEventLoop::exec (this=this@entry=0x7f7a5736dd70, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f7b0525d88f in QThread::exec (this=this@entry=0x3d1c070) at thread/qthread.cpp:542
#8  0x00007f7b0533fd13 in QInotifyFileSystemWatcherEngine::run (this=0x3d1c070) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007f7b0525ff2f in QThreadPrivate::start (arg=0x3d1c070) at thread/qthread_unix.cpp:338
#10 0x00007f7afc22df6e in start_thread (arg=0x7f7a5736e700) at pthread_create.c:311
#11 0x00007f7b087c09cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f7a4e730700 (LWP 2401)):
#0  0x00007f7b087b3f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f7afbb236a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7afbb237ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7b0538ca76 in QEventDispatcherGlib::processEvents (this=0x7f7a480008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f7b0535e5ef in QEventLoop::processEvents (this=this@entry=0x7f7a4e72fdb0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f7b0535e8e5 in QEventLoop::exec (this=this@entry=0x7f7a4e72fdb0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f7b0525d88f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7  0x00007f7b0525ff2f in QThreadPrivate::start (arg=0x22c7020) at thread/qthread_unix.cpp:338
#8  0x00007f7afc22df6e in start_thread (arg=0x7f7a4e730700) at pthread_create.c:311
#9  0x00007f7b087c09cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f7b08ed47c0 (LWP 2392)):
[KCrash Handler]
#6  QDeclarativeExpression::hasError (this=0x400000001) at qml/qdeclarativeexpression.cpp:769
#7  0x00007f7b06ffc54b in QDeclarativeBoundSignal::qt_metacall (this=0x71a3be0, c=<optimized out>, id=<optimized out>, a=0x7fff38ba23c0) at qml/qdeclarativeboundsignal.cpp:200
#8  0x00007f7b05373c52 in QMetaObject::activate (sender=sender@entry=0x3b92840, m=m@entry=0x7f7a66d26b20 <MouseEventListener::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fff38ba23c0) at kernel/qobject.cpp:3558
#9  0x00007f7a66b1e780 in pressed (_t1=0x7fff38ba23d0, this=0x3b92840) at ./mouseeventlistener.moc:368
#10 MouseEventListener::sceneEventFilter (this=0x3b92840, item=0x64afb20, event=0x7fff38ba28f0) at ../../../../plasma/declarativeimports/qtextracomponents/mouseeventlistener.cpp:176
#11 0x00007f7b04cc7fd5 in QGraphicsScenePrivate::filterDescendantEvent (this=this@entry=0x1e5f090, item=item@entry=0x64afb20, event=event@entry=0x7fff38ba28f0) at graphicsview/qgraphicsscene.cpp:1159
#12 0x00007f7b04ccc63e in QGraphicsScenePrivate::sendEvent (this=0x1e5f090, item=0x64afb20, event=0x7fff38ba28f0) at graphicsview/qgraphicsscene.cpp:1211
#13 0x00007f7b04cccb3f in QGraphicsScenePrivate::sendMouseEvent (this=0x1e5f090, mouseEvent=0x7fff38ba28f0) at graphicsview/qgraphicsscene.cpp:1295
#14 0x00007f7b04cd83b6 in QGraphicsScenePrivate::mousePressEventHandler (this=this@entry=0x1e5f090, mouseEvent=mouseEvent@entry=0x7fff38ba28f0) at graphicsview/qgraphicsscene.cpp:1422
#15 0x00007f7b04cd8849 in QGraphicsScene::mousePressEvent (this=<optimized out>, mouseEvent=0x7fff38ba28f0) at graphicsview/qgraphicsscene.cpp:4074
#16 0x00007f7b04ce16d0 in QGraphicsScene::event (this=0x1e2fb40, event=0x7fff38ba28f0) at graphicsview/qgraphicsscene.cpp:3455
#17 0x00007f7b046fcdfc in QApplicationPrivate::notify_helper (this=this@entry=0x1dd13b0, receiver=receiver@entry=0x1e2fb40, e=e@entry=0x7fff38ba28f0) at kernel/qapplication.cpp:4567
#18 0x00007f7b04703470 in QApplication::notify (this=this@entry=0x1dbc4e0, receiver=receiver@entry=0x1e2fb40, e=e@entry=0x7fff38ba28f0) at kernel/qapplication.cpp:4353
#19 0x00007f7b06023a6a in KApplication::notify (this=0x1dbc4e0, receiver=0x1e2fb40, event=0x7fff38ba28f0) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f7b0535f8bd in QCoreApplication::notifyInternal (this=0x1dbc4e0, receiver=0x1e2fb40, event=event@entry=0x7fff38ba28f0) at kernel/qcoreapplication.cpp:946
#21 0x00007f7b046fb526 in sendSpontaneousEvent (event=event@entry=0x7fff38ba28f0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#22 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fff38ba28f0) at kernel/qapplication.cpp:5565
#23 0x00007f7b04cf80af in QGraphicsView::mousePressEvent (this=0x4fc82f0, event=0x7fff38ba2e60) at graphicsview/qgraphicsview.cpp:3164
#24 0x00007f7b0474c191 in QWidget::event (this=this@entry=0x4fc82f0, event=event@entry=0x7fff38ba2e60) at kernel/qwidget.cpp:8371
#25 0x00007f7b04aed5be in QFrame::event (this=0x4fc82f0, e=0x7fff38ba2e60) at widgets/qframe.cpp:557
#26 0x00007f7b04cf8e09 in QGraphicsView::viewportEvent (this=0x4fc82f0, event=0x7fff38ba2e60) at graphicsview/qgraphicsview.cpp:2866
#27 0x00007f7b0535fa26 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x1dd13b0, receiver=receiver@entry=0x4fcbca0, event=event@entry=0x7fff38ba2e60) at kernel/qcoreapplication.cpp:1056
#28 0x00007f7b046fcddc in QApplicationPrivate::notify_helper (this=this@entry=0x1dd13b0, receiver=receiver@entry=0x4fcbca0, e=e@entry=0x7fff38ba2e60) at kernel/qapplication.cpp:4563
#29 0x00007f7b047035ad in QApplication::notify (this=this@entry=0x1dbc4e0, receiver=receiver@entry=0x4fcbca0, e=e@entry=0x7fff38ba2e60) at kernel/qapplication.cpp:4110
#30 0x00007f7b06023a6a in KApplication::notify (this=0x1dbc4e0, receiver=0x4fcbca0, event=0x7fff38ba2e60) at ../../kdeui/kernel/kapplication.cpp:311
#31 0x00007f7b0535f8bd in QCoreApplication::notifyInternal (this=0x1dbc4e0, receiver=receiver@entry=0x4fcbca0, event=event@entry=0x7fff38ba2e60) at kernel/qcoreapplication.cpp:946
#32 0x00007f7b04702d63 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#33 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x4fcbca0, event=event@entry=0x7fff38ba2e60, alienWidget=alienWidget@entry=0x4fcbca0, nativeWidget=nativeWidget@entry=0x4fc82f0, buttonDown=buttonDown@entry=0x7f7b051e12f8 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#34 0x00007f7b047777db in QETWidget::translateMouseEvent (this=this@entry=0x4fc82f0, event=event@entry=0x7fff38ba31e0) at kernel/qapplication_x11.cpp:4631
#35 0x00007f7b04777079 in QApplication::x11ProcessEvent (this=0x1dbc4e0, event=event@entry=0x7fff38ba31e0) at kernel/qapplication_x11.cpp:3624
#36 0x00007f7b0479e922 in x11EventSourceDispatch (s=0x1dce5f0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#37 0x00007f7afbb233b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f7afbb23708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f7afbb237ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f7b0538ca55 in QEventDispatcherGlib::processEvents (this=0x1d3ead0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#41 0x00007f7b0479e9d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x00007f7b0535e5ef in QEventLoop::processEvents (this=this@entry=0x7fff38ba35c0, flags=...) at kernel/qeventloop.cpp:149
#43 0x00007f7b0535e8e5 in QEventLoop::exec (this=this@entry=0x7fff38ba35c0, flags=...) at kernel/qeventloop.cpp:204
#44 0x00007f7b05363e5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#45 0x00007f7b046fb34c in QApplication::exec () at kernel/qapplication.cpp:3828
#46 0x00007f7b08aca27c in kdemain (argc=1, argv=0x7fff38ba3818) at ../../../../plasma/desktop/shell/main.cpp:126
#47 0x00007f7b086e7de5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7fff38ba3818, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff38ba3808) at libc-start.c:260
#48 0x000000000040070e in _start ()

Possible duplicates by query: bug 324372, bug 321658.

Reported using DrKonqi