Application: plasma-desktop (4.11.13)
KDE Platform Version: 4.14.2
Qt Version: 4.8.6
Operating System: Linux 3.16.7-ckt11-ck2 x86_64
Distribution: Debian GNU/Linux 8.2 (jessie)

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

i was reordering open applications in the task manager (settings: manual order)

could be related to bug 337850.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Shell del desktop di Plasma (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7d5338d800 (LWP 1758))]

Thread 3 (Thread 0x7f7d260ae700 (LWP 1772)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f7d4bd97dea in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f7d4c098f80 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f7d4bd97e19 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f7d465c50a4 in start_thread (arg=0x7f7d260ae700) at pthread_create.c:309
#4  0x00007f7d52c9104d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f7c97fff700 (LWP 1797)):
#0  g_mutex_unlock (mutex=0x7f7c900009a0) at /tmp/buildd/glib2.0-2.42.1/./glib/gthread-posix.c:1349
#1  0x00007f7d45ca1dfe in g_main_context_iterate (context=context@entry=0x7f7c900009a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /tmp/buildd/glib2.0-2.42.1/./glib/gmain.c:3759
#2  0x00007f7d45ca1ffc in g_main_context_iteration (context=0x7f7c900009a0, may_block=1) at /tmp/buildd/glib2.0-2.42.1/./glib/gmain.c:3842
#3  0x00007f7d4f74cd37 in QEventDispatcherGlib::processEvents (this=0x7f7c900008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f7d4f71c271 in QEventLoop::processEvents (this=this@entry=0x7f7c97ffed80, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f7d4f71c5d5 in QEventLoop::exec (this=this@entry=0x7f7c97ffed80, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f7d4f610e99 in QThread::exec (this=this@entry=0x1b8aac0) at thread/qthread.cpp:538
#7  0x00007f7d4f6fcac3 in QInotifyFileSystemWatcherEngine::run (this=0x1b8aac0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f7d4f61370f in QThreadPrivate::start (arg=0x1b8aac0) at thread/qthread_unix.cpp:349
#9  0x00007f7d465c50a4 in start_thread (arg=0x7f7c97fff700) at pthread_create.c:309
#10 0x00007f7d52c9104d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f7d5338d800 (LWP 1758)):
[KCrash Handler]
#6  QDeclarativeError::isValid (this=0xa8) at qml/qdeclarativeerror.cpp:138
#7  0x00007f7d51420b20 in QDeclarativeExpression::hasError (this=<optimized out>) at qml/qdeclarativeexpression.cpp:769
#8  0x00007f7d5145c45b in QDeclarativeBoundSignal::qt_metacall (this=0x4799840, c=<optimized out>, id=<optimized out>, a=0x7fff1057c490) at qml/qdeclarativeboundsignal.cpp:200
#9  0x00007f7d4f732abb in QMetaObject::activate (sender=sender@entry=0x59d7820, m=m@entry=0x7f7ca4ebbb80 <MouseEventListener::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fff1057c490) at kernel/qobject.cpp:3597
#10 0x00007f7ca4cb2c41 in positionChanged (_t1=0x7fff1057c4a0, this=0x59d7820) at ./mouseeventlistener.moc:374
#11 MouseEventListener::mouseMoveEvent (this=0x59d7820, me=<optimized out>) at ../../../../plasma/declarativeimports/qtextracomponents/mouseeventlistener.cpp:121
#12 0x00007f7d4f053d63 in QGraphicsItem::sceneEvent (this=this@entry=0x59d7830, event=event@entry=0x7fff1057c9b0) at graphicsview/qgraphicsitem.cpp:6749
#13 0x00007f7d513b51b4 in QDeclarativeItem::sceneEvent (this=0x59d7820, event=0x7fff1057c9b0) at graphicsitems/qdeclarativeitem.cpp:3047
#14 0x00007f7d4f07ce97 in QGraphicsScenePrivate::sendMouseEvent (this=0x1687df0, mouseEvent=0x7fff1057c9b0) at graphicsview/qgraphicsscene.cpp:1295
#15 0x00007f7d4f0872e6 in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7fff1057c9b0) at graphicsview/qgraphicsscene.cpp:4102
#16 0x00007f7d4f0942ef in QGraphicsScene::event (this=0x1687a90, event=0x7fff1057c9b0) at graphicsview/qgraphicsscene.cpp:3451
#17 0x00007f7d4ea6e48c in QApplicationPrivate::notify_helper (this=this@entry=0x158efb0, receiver=receiver@entry=0x1687a90, e=e@entry=0x7fff1057c9b0) at kernel/qapplication.cpp:4570
#18 0x00007f7d4ea74fa8 in QApplication::notify (this=this@entry=0x157aba0, receiver=receiver@entry=0x1687a90, e=e@entry=0x7fff1057c9b0) at kernel/qapplication.cpp:4356
#19 0x00007f7d504411aa in KApplication::notify (this=0x157aba0, receiver=0x1687a90, event=0x7fff1057c9b0) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f7d4f71d71d in QCoreApplication::notifyInternal (this=0x157aba0, receiver=0x1687a90, event=event@entry=0x7fff1057c9b0) at kernel/qcoreapplication.cpp:955
#21 0x00007f7d4ea6cb36 in sendSpontaneousEvent (event=event@entry=0x7fff1057c9b0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#22 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fff1057c9b0) at kernel/qapplication.cpp:5568
#23 0x00007f7d4f0aa638 in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x2ea7150, event=event@entry=0x7fff1057d080) at graphicsview/qgraphicsview.cpp:646
#24 0x00007f7d4f0ab6ca in QGraphicsView::mouseMoveEvent (this=0x2e7e660, event=0x7fff1057d080) at graphicsview/qgraphicsview.cpp:3276
#25 0x00007f7d4eac1748 in QWidget::event (this=0x2e7e660, event=0x7fff1057d080) at kernel/qwidget.cpp:8775
#26 0x00007f7d4ee8383e in QFrame::event (this=0x2e7e660, e=0x7fff1057d080) at widgets/qframe.cpp:557
#27 0x00007f7d4f0ace81 in QGraphicsView::viewportEvent (this=0x2e7e660, event=0x7fff1057d080) at graphicsview/qgraphicsview.cpp:2866
#28 0x00007f7d4f71d886 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x158efb0, receiver=receiver@entry=0x2ed41f0, event=event@entry=0x7fff1057d080) at kernel/qcoreapplication.cpp:1065
#29 0x00007f7d4ea6e46c in QApplicationPrivate::notify_helper (this=this@entry=0x158efb0, receiver=receiver@entry=0x2ed41f0, e=e@entry=0x7fff1057d080) at kernel/qapplication.cpp:4566
#30 0x00007f7d4ea7510f in QApplication::notify (this=this@entry=0x157aba0, receiver=receiver@entry=0x2ed41f0, e=e@entry=0x7fff1057d080) at kernel/qapplication.cpp:4113
#31 0x00007f7d504411aa in KApplication::notify (this=0x157aba0, receiver=0x2ed41f0, event=0x7fff1057d080) at ../../kdeui/kernel/kapplication.cpp:311
#32 0x00007f7d4f71d71d in QCoreApplication::notifyInternal (this=0x157aba0, receiver=receiver@entry=0x2ed41f0, event=event@entry=0x7fff1057d080) at kernel/qcoreapplication.cpp:955
#33 0x00007f7d4ea7476f in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#34 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x2ed41f0, event=event@entry=0x7fff1057d080, alienWidget=alienWidget@entry=0x2ed41f0, nativeWidget=nativeWidget@entry=0x2e7e660, buttonDown=buttonDown@entry=0x7f7d4f593538 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3178
#35 0x00007f7d4eaeb432 in QETWidget::translateMouseEvent (this=this@entry=0x2e7e660, event=event@entry=0x7fff1057d3e0) at kernel/qapplication_x11.cpp:4540
#36 0x00007f7d4eae9e2c in QApplication::x11ProcessEvent (this=0x157aba0, event=event@entry=0x7fff1057d3e0) at kernel/qapplication_x11.cpp:3663
#37 0x00007f7d4eb12ed2 in x11EventSourceDispatch (s=0x156de20, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#38 0x00007f7d45ca1c5d in g_main_dispatch (context=0x158f280) at /tmp/buildd/glib2.0-2.42.1/./glib/gmain.c:3111
#39 g_main_context_dispatch (context=context@entry=0x158f280) at /tmp/buildd/glib2.0-2.42.1/./glib/gmain.c:3710
#40 0x00007f7d45ca1f48 in g_main_context_iterate (context=context@entry=0x158f280, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /tmp/buildd/glib2.0-2.42.1/./glib/gmain.c:3781
#41 0x00007f7d45ca1ffc in g_main_context_iteration (context=0x158f280, may_block=1) at /tmp/buildd/glib2.0-2.42.1/./glib/gmain.c:3842
#42 0x00007f7d4f74cd1d in QEventDispatcherGlib::processEvents (this=0x14e3b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#43 0x00007f7d4eb12f96 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#44 0x00007f7d4f71c271 in QEventLoop::processEvents (this=this@entry=0x7fff1057d7c0, flags=...) at kernel/qeventloop.cpp:149
#45 0x00007f7d4f71c5d5 in QEventLoop::exec (this=this@entry=0x7fff1057d7c0, flags=...) at kernel/qeventloop.cpp:204
#46 0x00007f7d4f722059 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1227
#47 0x00007f7d52f944bd in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#48 0x00007f7d52bccb45 in __libc_start_main (main=0x4006f0, argc=1, argv=0x7fff1057da18, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff1057da08) at libc-start.c:287
#49 0x000000000040071e in _start ()

Reported using DrKonqi