Bug 330987

Application: plasma-desktop (4.11.5)
KDE Platform Version: 4.12.1
Qt Version: 4.8.6
Operating System: Linux 3.11.0-17-lowlatency x86_64
Distribution: Ubuntu 13.10

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

By mistake I dragged one icon of a group of windows (Goggle Chrome) away from the task panel.
This created a small gray "placeholder" in the task bar for a while and then the panel went away and crashed

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f956a3d17c0 (LWP 3229))]

Thread 7 (Thread 0x7f954b32b700 (LWP 3230)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f956307cf3b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f956307cf79 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f955d93bf6e in start_thread (arg=0x7f954b32b700) at pthread_create.c:311
#4  0x00007f9569cd29cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 6 (Thread 0x7f94bf6bf700 (LWP 3231)):
#0  0x00007f955d2713c9 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f955d230830 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f955d231565 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f955d2317ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f956689aaf6 in QEventDispatcherGlib::processEvents (this=0x7f94b80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#5  0x00007f956686c30f in QEventLoop::processEvents (this=this@entry=0x7f94bf6bed70, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f956686c605 in QEventLoop::exec (this=this@entry=0x7f94bf6bed70, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f9566768c4f in QThread::exec (this=this@entry=0x2fb2bc0) at thread/qthread.cpp:537
#8  0x00007f956684da33 in QInotifyFileSystemWatcherEngine::run (this=0x2fb2bc0) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007f956676b31f in QThreadPrivate::start (arg=0x2fb2bc0) at thread/qthread_unix.cpp:349
#10 0x00007f955d93bf6e in start_thread (arg=0x7f94bf6bf700) at pthread_create.c:311
#11 0x00007f9569cd29cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 5 (Thread 0x7f94be22d700 (LWP 3232)):
#0  0x00007f955d93e055 in __GI___pthread_mutex_lock (mutex=0x7f94b0000a60) at pthread_mutex_lock.c:95
#1  0x00007f955d2713a1 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f955d231659 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f955d2317ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f956689aaf6 in QEventDispatcherGlib::processEvents (this=0x7f94b00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#5  0x00007f956686c30f in QEventLoop::processEvents (this=this@entry=0x7f94be22cd70, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f956686c605 in QEventLoop::exec (this=this@entry=0x7f94be22cd70, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f9566768c4f in QThread::exec (this=this@entry=0x304d440) at thread/qthread.cpp:537
#8  0x00007f956684da33 in QInotifyFileSystemWatcherEngine::run (this=0x304d440) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007f956676b31f in QThreadPrivate::start (arg=0x304d440) at thread/qthread_unix.cpp:349
#10 0x00007f955d93bf6e in start_thread (arg=0x7f94be22d700) at pthread_create.c:311
#11 0x00007f9569cd29cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f94bda2c700 (LWP 3233)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9564c461cd in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f9564c46209 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f955d93bf6e in start_thread (arg=0x7f94bda2c700) at pthread_create.c:311
#4  0x00007f9569cd29cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f94b6f2b700 (LWP 3234)):
#0  0x00007f9569cc5f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f955d2316a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f955d2317ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f956689aaf6 in QEventDispatcherGlib::processEvents (this=0x7f94680008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:427
#4  0x00007f956686c30f in QEventLoop::processEvents (this=this@entry=0x7f94b6f2adb0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f956686c605 in QEventLoop::exec (this=this@entry=0x7f94b6f2adb0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f9566768c4f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#7  0x00007f956676b31f in QThreadPrivate::start (arg=0x30b7890) at thread/qthread_unix.cpp:349
#8  0x00007f955d93bf6e in start_thread (arg=0x7f94b6f2b700) at pthread_create.c:311
#9  0x00007f9569cd29cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f9457fff700 (LWP 3616)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f9564986bbd in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f9564c75a76 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f955d93bf6e in start_thread (arg=0x7f9457fff700) at pthread_create.c:311
#4  0x00007f9569cd29cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f956a3d17c0 (LWP 3229)):
[KCrash Handler]
#6  QDeclarativeExpression::hasError (this=0x20) at qml/qdeclarativeexpression.cpp:769
#7  0x00007f956850c73b in QDeclarativeBoundSignal::qt_metacall (this=0x330f780, c=<optimized out>, id=<optimized out>, a=0x7fff859fd6c0) at qml/qdeclarativeboundsignal.cpp:200
#8  0x00007f9566881ce2 in QMetaObject::activate (sender=0x56db780, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff859fd6c0) at kernel/qobject.cpp:3569
#9  0x00007f94c96975f7 in ?? () from /usr/lib/kde4/imports/org/kde/qtextracomponents/libqtextracomponentsplugin.so
#10 0x00007f95661b1136 in QGraphicsItem::sceneEvent (this=this@entry=0x56db790, event=event@entry=0x7fff859fdb70) at graphicsview/qgraphicsitem.cpp:6749
#11 0x00007f9568469b14 in QDeclarativeItem::sceneEvent (this=0x56db780, event=0x7fff859fdb70) at graphicsitems/qdeclarativeitem.cpp:3081
#12 0x00007f95661d80cf in QGraphicsScenePrivate::sendMouseEvent (this=0x247d470, mouseEvent=0x7fff859fdb70) at graphicsview/qgraphicsscene.cpp:1295
#13 0x00007f95661e0c86 in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7fff859fdb70) at graphicsview/qgraphicsscene.cpp:4102
#14 0x00007f95661ecbbc in QGraphicsScene::event (this=0x24188c0, event=0x7fff859fdb70) at graphicsview/qgraphicsscene.cpp:3451
#15 0x00007f9565c06e7c in QApplicationPrivate::notify_helper (this=this@entry=0x240f2a0, receiver=receiver@entry=0x24188c0, e=e@entry=0x7fff859fdb70) at kernel/qapplication.cpp:4567
#16 0x00007f9565c0d4f0 in QApplication::notify (this=this@entry=0x240e900, receiver=receiver@entry=0x24188c0, e=e@entry=0x7fff859fdb70) at kernel/qapplication.cpp:4353
#17 0x00007f9567533c6a in KApplication::notify (this=0x240e900, receiver=0x24188c0, event=0x7fff859fdb70) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007f956686d73d in QCoreApplication::notifyInternal (this=0x240e900, receiver=0x24188c0, event=event@entry=0x7fff859fdb70) at kernel/qcoreapplication.cpp:953
#19 0x00007f9565c055a6 in sendSpontaneousEvent (event=event@entry=0x7fff859fdb70, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#20 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fff859fdb70) at kernel/qapplication.cpp:5565
#21 0x00007f9566201e3c in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x34de980, event=event@entry=0x7fff859fe1f0) at graphicsview/qgraphicsview.cpp:646
#22 0x00007f9566202d4a in QGraphicsView::mouseMoveEvent (this=0x34de950, event=0x7fff859fe1f0) at graphicsview/qgraphicsview.cpp:3276
#23 0x00007f9565c566e5 in QWidget::event (this=this@entry=0x34de950, event=event@entry=0x7fff859fe1f0) at kernel/qwidget.cpp:8361
#24 0x00007f9565ff866e in QFrame::event (this=0x34de950, e=0x7fff859fe1f0) at widgets/qframe.cpp:557
#25 0x00007f9566204399 in QGraphicsView::viewportEvent (this=0x34de950, event=0x7fff859fe1f0) at graphicsview/qgraphicsview.cpp:2866
#26 0x00007f956686d8a6 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x240f2a0, receiver=receiver@entry=0x34f3ff0, event=event@entry=0x7fff859fe1f0) at kernel/qcoreapplication.cpp:1063
#27 0x00007f9565c06e5c in QApplicationPrivate::notify_helper (this=this@entry=0x240f2a0, receiver=receiver@entry=0x34f3ff0, e=e@entry=0x7fff859fe1f0) at kernel/qapplication.cpp:4563
#28 0x00007f9565c0d62d in QApplication::notify (this=this@entry=0x240e900, receiver=receiver@entry=0x34f3ff0, e=e@entry=0x7fff859fe1f0) at kernel/qapplication.cpp:4110
#29 0x00007f9567533c6a in KApplication::notify (this=0x240e900, receiver=0x34f3ff0, event=0x7fff859fe1f0) at ../../kdeui/kernel/kapplication.cpp:311
#30 0x00007f956686d73d in QCoreApplication::notifyInternal (this=0x240e900, receiver=receiver@entry=0x34f3ff0, event=event@entry=0x7fff859fe1f0) at kernel/qcoreapplication.cpp:953
#31 0x00007f9565c0cde3 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#32 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x34f3ff0, event=event@entry=0x7fff859fe1f0, alienWidget=alienWidget@entry=0x34f3ff0, nativeWidget=nativeWidget@entry=0x2a3b110, buttonDown=buttonDown@entry=0x7f95666ec318 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#33 0x00007f9565c81dec in QETWidget::translateMouseEvent (this=this@entry=0x2a3b110, event=event@entry=0x7fff859fe540) at kernel/qapplication_x11.cpp:4568
#34 0x00007f9565c81359 in QApplication::x11ProcessEvent (this=0x240e900, event=event@entry=0x7fff859fe540) at kernel/qapplication_x11.cpp:3627
#35 0x00007f9565ca8c02 in x11EventSourceDispatch (s=0x2410920, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#36 0x00007f955d2313b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007f955d231708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f955d2317ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f956689aad5 in QEventDispatcherGlib::processEvents (this=0x2341af0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#40 0x00007f9565ca8cb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#41 0x00007f956686c30f in QEventLoop::processEvents (this=this@entry=0x7fff859fe920, flags=...) at kernel/qeventloop.cpp:149
#42 0x00007f956686c605 in QEventLoop::exec (this=this@entry=0x7fff859fe920, flags=...) at kernel/qeventloop.cpp:204
#43 0x00007f9566871deb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#44 0x00007f9569fdc64c in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#45 0x00007f9569bf9de5 in __libc_start_main (main=0x4006e0, argc=1, ubp_av=0x7fff859feb78, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff859feb68) at libc-start.c:260
#46 0x000000000040070e in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 326879.

Possible duplicates by query: bug 330120, bug 329774, bug 329380, bug 327744, bug 327114.

Reported using DrKonqi