Application: plasma-desktop (4.11.5)
KDE Platform Version: 4.11.5
Qt Version: 4.8.4
Operating System: Linux 3.11.0-12-generic x86_64
Distribution: Linux Mint 16 Petra

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

I am using double monitor. I had 2 instances of dolphin open. I tried to right-click close one of them from the drop down menu that appears when you mouse over grouped instances in the panel. On a side note, while trying to reproduce this bug i noticed that using the option of highlighting windows is a bit buggy with grouped instances and switching between apps in the panel.

The crash can be reproduced sometimes.

-- 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 0x7f0a4452b7c0 (LWP 1857))]

Thread 5 (Thread 0x7f0a2387a700 (LWP 1859)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0a3d1c106b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f0a3d1c10a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f0a37878f6e in start_thread (arg=0x7f0a2387a700) at pthread_create.c:311
#4  0x00007f0a43e0d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f09936ff700 (LWP 1861)):
#0  0x00007f0a43e00f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f0a3716e6a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a3716eb0a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f09941eeb66 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f0a371930f5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f0a37878f6e in start_thread (arg=0x7f09936ff700) at pthread_create.c:311
#6  0x00007f0a43e0d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f099288f700 (LWP 1862)):
#0  __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1  0x00007f0a3787b177 in _L_lock_1035 () from /lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007f0a3787b009 in __GI___pthread_mutex_lock (mutex=0x7f0a34b4cee0) at pthread_mutex_lock.c:85
#3  0x00007f0a348de44c in ?? () from /usr/lib/libGL.so.1
#4  0x00007f0a348df520 in ?? () from /usr/lib/libGL.so.1
#5  0x00007f0a348df7c8 in ?? () from /usr/lib/libGL.so.1
#6  0x00007f0a32510e1b in ?? () from /usr/lib/tls/libnvidia-tls.so.331.49
#7  0x00007f0a371ad670 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f0a3716e1cc in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f0a3716e63b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f0a3716e7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f0a409daa76 in QEventDispatcherGlib::processEvents (this=0x7f09880008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#12 0x00007f0a409ac5ef in QEventLoop::processEvents (this=this@entry=0x7f099288ed70, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007f0a409ac8e5 in QEventLoop::exec (this=this@entry=0x7f099288ed70, flags=...) at kernel/qeventloop.cpp:204
#14 0x00007f0a408ab88f in QThread::exec (this=this@entry=0x2d43d10) at thread/qthread.cpp:542
#15 0x00007f0a4098dd13 in QInotifyFileSystemWatcherEngine::run (this=0x2d43d10) at io/qfilesystemwatcher_inotify.cpp:265
#16 0x00007f0a408adf2f in QThreadPrivate::start (arg=0x2d43d10) at thread/qthread_unix.cpp:338
#17 0x00007f0a37878f6e in start_thread (arg=0x7f099288f700) at pthread_create.c:311
#18 0x00007f0a43e0d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f09837c5700 (LWP 1866)):
#0  0x00007f0a43e00f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f0a3716e6a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f0a3716e7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f0a409daa76 in QEventDispatcherGlib::processEvents (this=0x7f097c0008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f0a409ac5ef in QEventLoop::processEvents (this=this@entry=0x7f09837c4d70, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f0a409ac8e5 in QEventLoop::exec (this=this@entry=0x7f09837c4d70, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f0a408ab88f in QThread::exec (this=this@entry=0x21f8810) at thread/qthread.cpp:542
#7  0x00007f0a4098dd13 in QInotifyFileSystemWatcherEngine::run (this=0x21f8810) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007f0a408adf2f in QThreadPrivate::start (arg=0x21f8810) at thread/qthread_unix.cpp:338
#9  0x00007f0a37878f6e in start_thread (arg=0x7f09837c5700) at pthread_create.c:311
#10 0x00007f0a43e0d9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f0a4452b7c0 (LWP 1857)):
[KCrash Handler]
#6  0x00007f0a409bf0d4 in QObject::killTimer (this=0x428ef90, id=0) at kernel/qobject.cpp:1602
#7  0x00007f0a409ca9c1 in QTimer::stop (this=this@entry=0x428ef90) at kernel/qtimer.cpp:266
#8  0x00007f0a409caa4f in QTimer::start (this=0x428ef90) at kernel/qtimer.cpp:216
#9  0x00007f0a409caa88 in QTimer::start (this=<optimized out>, msec=msec@entry=800) at kernel/qtimer.cpp:234
#10 0x00007f0a22301b90 in MouseEventListener::mousePressEvent (this=0x4740ad0, me=<optimized out>) at ../../../../plasma/declarativeimports/qtextracomponents/mouseeventlistener.cpp:110
#11 0x00007f0a402f3aef in QGraphicsItem::sceneEvent (this=this@entry=0x4740ae0, event=event@entry=0x7fffcfa76610) at graphicsview/qgraphicsitem.cpp:6739
#12 0x00007f0a425a7a54 in QDeclarativeItem::sceneEvent (this=0x4740ad0, event=0x7fffcfa76610) at graphicsitems/qdeclarativeitem.cpp:3049
#13 0x00007f0a4031ab3f in QGraphicsScenePrivate::sendMouseEvent (this=0x22a3070, mouseEvent=0x7fffcfa76610) at graphicsview/qgraphicsscene.cpp:1295
#14 0x00007f0a403263b6 in QGraphicsScenePrivate::mousePressEventHandler (this=this@entry=0x22a3070, mouseEvent=mouseEvent@entry=0x7fffcfa76610) at graphicsview/qgraphicsscene.cpp:1422
#15 0x00007f0a40326849 in QGraphicsScene::mousePressEvent (this=<optimized out>, mouseEvent=0x7fffcfa76610) at graphicsview/qgraphicsscene.cpp:4074
#16 0x00007f0a4032f6d0 in QGraphicsScene::event (this=0x23dbb80, event=0x7fffcfa76610) at graphicsview/qgraphicsscene.cpp:3455
#17 0x00007f0a3fd4adfc in QApplicationPrivate::notify_helper (this=this@entry=0x21b8ea0, receiver=receiver@entry=0x23dbb80, e=e@entry=0x7fffcfa76610) at kernel/qapplication.cpp:4567
#18 0x00007f0a3fd51470 in QApplication::notify (this=this@entry=0x21b05a0, receiver=receiver@entry=0x23dbb80, e=e@entry=0x7fffcfa76610) at kernel/qapplication.cpp:4353
#19 0x00007f0a41671a6a in KApplication::notify (this=0x21b05a0, receiver=0x23dbb80, event=0x7fffcfa76610) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f0a409ad8bd in QCoreApplication::notifyInternal (this=0x21b05a0, receiver=0x23dbb80, event=event@entry=0x7fffcfa76610) at kernel/qcoreapplication.cpp:946
#21 0x00007f0a3fd49526 in sendSpontaneousEvent (event=event@entry=0x7fffcfa76610, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#22 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fffcfa76610) at kernel/qapplication.cpp:5565
#23 0x00007f0a403460af in QGraphicsView::mousePressEvent (this=0x2caa710, event=0x7fffcfa76bb0) at graphicsview/qgraphicsview.cpp:3164
#24 0x00007f0a3fd9a191 in QWidget::event (this=this@entry=0x2caa710, event=event@entry=0x7fffcfa76bb0) at kernel/qwidget.cpp:8371
#25 0x00007f0a4013b5be in QFrame::event (this=0x2caa710, e=0x7fffcfa76bb0) at widgets/qframe.cpp:557
#26 0x00007f0a40346e09 in QGraphicsView::viewportEvent (this=0x2caa710, event=0x7fffcfa76bb0) at graphicsview/qgraphicsview.cpp:2866
#27 0x00007f0a409ada26 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x21b8ea0, receiver=receiver@entry=0x2ccc840, event=event@entry=0x7fffcfa76bb0) at kernel/qcoreapplication.cpp:1056
#28 0x00007f0a3fd4addc in QApplicationPrivate::notify_helper (this=this@entry=0x21b8ea0, receiver=receiver@entry=0x2ccc840, e=e@entry=0x7fffcfa76bb0) at kernel/qapplication.cpp:4563
#29 0x00007f0a3fd515ad in QApplication::notify (this=this@entry=0x21b05a0, receiver=receiver@entry=0x2ccc840, e=e@entry=0x7fffcfa76bb0) at kernel/qapplication.cpp:4110
#30 0x00007f0a41671a6a in KApplication::notify (this=0x21b05a0, receiver=0x2ccc840, event=0x7fffcfa76bb0) at ../../kdeui/kernel/kapplication.cpp:311
#31 0x00007f0a409ad8bd in QCoreApplication::notifyInternal (this=0x21b05a0, receiver=receiver@entry=0x2ccc840, event=event@entry=0x7fffcfa76bb0) at kernel/qcoreapplication.cpp:946
#32 0x00007f0a3fd50d63 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#33 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x2ccc840, event=event@entry=0x7fffcfa76bb0, alienWidget=alienWidget@entry=0x2ccc840, nativeWidget=nativeWidget@entry=0x2678690, buttonDown=buttonDown@entry=0x7f0a4082f2f8 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#34 0x00007f0a3fdc5b0c in QETWidget::translateMouseEvent (this=this@entry=0x2678690, event=event@entry=0x7fffcfa76f00) at kernel/qapplication_x11.cpp:4565
#35 0x00007f0a3fdc5079 in QApplication::x11ProcessEvent (this=0x21b05a0, event=event@entry=0x7fffcfa76f00) at kernel/qapplication_x11.cpp:3624
#36 0x00007f0a3fdec922 in x11EventSourceDispatch (s=0x21b8ce0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#37 0x00007f0a3716e3b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007f0a3716e708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f0a3716e7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f0a409daa55 in QEventDispatcherGlib::processEvents (this=0x21b7150, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#41 0x00007f0a3fdec9d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x00007f0a409ac5ef in QEventLoop::processEvents (this=this@entry=0x7fffcfa772e0, flags=...) at kernel/qeventloop.cpp:149
#43 0x00007f0a409ac8e5 in QEventLoop::exec (this=this@entry=0x7fffcfa772e0, flags=...) at kernel/qeventloop.cpp:204
#44 0x00007f0a409b1e5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#45 0x00007f0a3fd4934c in QApplication::exec () at kernel/qapplication.cpp:3828
#46 0x00007f0a4411764c in kdemain (argc=1, argv=0x7fffcfa77538) at ../../../../plasma/desktop/shell/main.cpp:126
#47 0x00007f0a43d34de5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7fffcfa77538, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffcfa77528) at libc-start.c:260
#48 0x000000000040070e in _start ()

Possible duplicates by query: bug 331115, bug 330766, bug 330109, bug 327435, bug 326941.

Reported using DrKonqi