Application: plasma-desktop (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.4
Operating System: Linux 3.11.0-13-generic x86_64
Distribution: Ubuntu 13.10

-- Information about the crash:
- What I was doing when the application crashed:
Switching from xchat to Thunderbird, with google-chrome open also.

- Unusual behavior I noticed:
The taskbar 'restarted' and kicked the xchat icon out and on to the desktop (in a little window the size of a taskbar icon.)

-- 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 0x7ff50b0197c0 (LWP 2217))]

Thread 4 (Thread 0x7ff4ec0a9700 (LWP 2220)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ff503cb806b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007ff503cb80a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007ff4fe372f6e in start_thread (arg=0x7ff4ec0a9700) at pthread_create.c:311
#4  0x00007ff50a9059cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7ff45b5ff700 (LWP 2224)):
#0  0x00007ff50a8f8f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ff4fdc686a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff4fdc687ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff5074d1a76 in QEventDispatcherGlib::processEvents (this=0x7ff4540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007ff5074a35ef in QEventLoop::processEvents (this=this@entry=0x7ff45b5fed70, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007ff5074a38e5 in QEventLoop::exec (this=this@entry=0x7ff45b5fed70, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007ff5073a288f in QThread::exec (this=this@entry=0x2cfc040) at thread/qthread.cpp:542
#7  0x00007ff507484d13 in QInotifyFileSystemWatcherEngine::run (this=0x2cfc040) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007ff5073a4f2f in QThreadPrivate::start (arg=0x2cfc040) at thread/qthread_unix.cpp:338
#9  0x00007ff4fe372f6e in start_thread (arg=0x7ff45b5ff700) at pthread_create.c:311
#10 0x00007ff50a9059cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7ff453b97700 (LWP 2225)):
#0  0x00007ff4fdca80ea in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ff4fdca8399 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ff4fdc67d59 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ff4fdc685c3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ff4fdc687ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ff5074d1a76 in QEventDispatcherGlib::processEvents (this=0x7ff44c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007ff5074a35ef in QEventLoop::processEvents (this=this@entry=0x7ff453b96d70, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007ff5074a38e5 in QEventLoop::exec (this=this@entry=0x7ff453b96d70, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007ff5073a288f in QThread::exec (this=this@entry=0x2e06030) at thread/qthread.cpp:542
#9  0x00007ff507484d13 in QInotifyFileSystemWatcherEngine::run (this=0x2e06030) at io/qfilesystemwatcher_inotify.cpp:265
#10 0x00007ff5073a4f2f in QThreadPrivate::start (arg=0x2e06030) at thread/qthread_unix.cpp:338
#11 0x00007ff4fe372f6e in start_thread (arg=0x7ff453b97700) at pthread_create.c:311
#12 0x00007ff50a9059cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7ff50b0197c0 (LWP 2217)):
[KCrash Handler]
#6  QObject::killTimer (this=<optimized out>, id=32) at kernel/qobject.cpp:1603
#7  0x00007ff5074c19c1 in QTimer::stop (this=this@entry=0x53d8c00) at kernel/qtimer.cpp:266
#8  0x00007ff5074c1a4f in QTimer::start (this=0x53d8c00) at kernel/qtimer.cpp:216
#9  0x00007ff46ab21793 in ?? () from /usr/lib/kde4/imports/org/kde/qtextracomponents/libqtextracomponentsplugin.so
#10 0x00007ff506e0cfd5 in QGraphicsScenePrivate::filterDescendantEvent (this=this@entry=0x2008690, item=item@entry=0x4bf8720, event=event@entry=0x7fffe4bf8500) at graphicsview/qgraphicsscene.cpp:1159
#11 0x00007ff506e1163e in QGraphicsScenePrivate::sendEvent (this=0x2008690, item=0x4bf8720, event=0x7fffe4bf8500) at graphicsview/qgraphicsscene.cpp:1211
#12 0x00007ff506e11b3f in QGraphicsScenePrivate::sendMouseEvent (this=0x2008690, mouseEvent=0x7fffe4bf8500) at graphicsview/qgraphicsscene.cpp:1295
#13 0x00007ff506e1d3b6 in QGraphicsScenePrivate::mousePressEventHandler (this=this@entry=0x2008690, mouseEvent=mouseEvent@entry=0x7fffe4bf8500) at graphicsview/qgraphicsscene.cpp:1422
#14 0x00007ff506e1d849 in QGraphicsScene::mousePressEvent (this=<optimized out>, mouseEvent=0x7fffe4bf8500) at graphicsview/qgraphicsscene.cpp:4074
#15 0x00007ff506e266d0 in QGraphicsScene::event (this=0x2069320, event=0x7fffe4bf8500) at graphicsview/qgraphicsscene.cpp:3455
#16 0x00007ff506841dfc in QApplicationPrivate::notify_helper (this=this@entry=0x2000db0, receiver=receiver@entry=0x2069320, e=e@entry=0x7fffe4bf8500) at kernel/qapplication.cpp:4567
#17 0x00007ff506848470 in QApplication::notify (this=this@entry=0x1ffaec0, receiver=receiver@entry=0x2069320, e=e@entry=0x7fffe4bf8500) at kernel/qapplication.cpp:4353
#18 0x00007ff508168a6a in KApplication::notify (this=0x1ffaec0, receiver=0x2069320, event=0x7fffe4bf8500) at ../../kdeui/kernel/kapplication.cpp:311
#19 0x00007ff5074a48bd in QCoreApplication::notifyInternal (this=0x1ffaec0, receiver=0x2069320, event=event@entry=0x7fffe4bf8500) at kernel/qcoreapplication.cpp:946
#20 0x00007ff506840526 in sendSpontaneousEvent (event=event@entry=0x7fffe4bf8500, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#21 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fffe4bf8500) at kernel/qapplication.cpp:5565
#22 0x00007ff506e3d0af in QGraphicsView::mousePressEvent (this=0x3c1fcc0, event=0x7fffe4bf8a70) at graphicsview/qgraphicsview.cpp:3164
#23 0x00007ff506891191 in QWidget::event (this=this@entry=0x3c1fcc0, event=event@entry=0x7fffe4bf8a70) at kernel/qwidget.cpp:8371
#24 0x00007ff506c325be in QFrame::event (this=0x3c1fcc0, e=0x7fffe4bf8a70) at widgets/qframe.cpp:557
#25 0x00007ff506e3de09 in QGraphicsView::viewportEvent (this=0x3c1fcc0, event=0x7fffe4bf8a70) at graphicsview/qgraphicsview.cpp:2866
#26 0x00007ff5074a4a26 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x2000db0, receiver=receiver@entry=0x3c25f40, event=event@entry=0x7fffe4bf8a70) at kernel/qcoreapplication.cpp:1056
#27 0x00007ff506841ddc in QApplicationPrivate::notify_helper (this=this@entry=0x2000db0, receiver=receiver@entry=0x3c25f40, e=e@entry=0x7fffe4bf8a70) at kernel/qapplication.cpp:4563
#28 0x00007ff5068485ad in QApplication::notify (this=this@entry=0x1ffaec0, receiver=receiver@entry=0x3c25f40, e=e@entry=0x7fffe4bf8a70) at kernel/qapplication.cpp:4110
#29 0x00007ff508168a6a in KApplication::notify (this=0x1ffaec0, receiver=0x3c25f40, event=0x7fffe4bf8a70) at ../../kdeui/kernel/kapplication.cpp:311
#30 0x00007ff5074a48bd in QCoreApplication::notifyInternal (this=0x1ffaec0, receiver=receiver@entry=0x3c25f40, event=event@entry=0x7fffe4bf8a70) at kernel/qcoreapplication.cpp:946
#31 0x00007ff506847d63 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#32 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x3c25f40, event=event@entry=0x7fffe4bf8a70, alienWidget=alienWidget@entry=0x3c25f40, nativeWidget=nativeWidget@entry=0x3c1fcc0, buttonDown=buttonDown@entry=0x7ff5073262f8 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#33 0x00007ff5068bc7db in QETWidget::translateMouseEvent (this=this@entry=0x3c1fcc0, event=event@entry=0x7fffe4bf8df0) at kernel/qapplication_x11.cpp:4631
#34 0x00007ff5068bc079 in QApplication::x11ProcessEvent (this=0x1ffaec0, event=event@entry=0x7fffe4bf8df0) at kernel/qapplication_x11.cpp:3624
#35 0x00007ff5068e3922 in x11EventSourceDispatch (s=0x2000c80, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#36 0x00007ff4fdc683b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007ff4fdc68708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007ff4fdc687ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007ff5074d1a55 in QEventDispatcherGlib::processEvents (this=0x1f73ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#40 0x00007ff5068e39d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#41 0x00007ff5074a35ef in QEventLoop::processEvents (this=this@entry=0x7fffe4bf91d0, flags=...) at kernel/qeventloop.cpp:149
#42 0x00007ff5074a38e5 in QEventLoop::exec (this=this@entry=0x7fffe4bf91d0, flags=...) at kernel/qeventloop.cpp:204
#43 0x00007ff5074a8e5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#44 0x00007ff50ac0f27c in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#45 0x00007ff50a82cde5 in __libc_start_main (main=0x4006e0, argc=1, ubp_av=0x7fffe4bf9428, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe4bf9418) at libc-start.c:260
#46 0x000000000040070e in _start ()

Possible duplicates by query: bug 326941, bug 325880, bug 325188.

Reported using DrKonqi