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:

firfox had 2 windows open which were grouped. I clicked that grouping this window is not allowed. after that plasma crashed (it could be that it crashed after moving the mouse then). after plasma was automatically restarted, the firefox windows have not been grouped anymore.

-- 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 0x7fb74dda97c0 (LWP 1979))]

Thread 7 (Thread 0x7fb72e860700 (LWP 1981)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb746a4506b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fb746a450a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fb7410fff6e in start_thread (arg=0x7fb72e860700) at pthread_create.c:311
#4  0x00007fb74d6929cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 6 (Thread 0x7fb69e6cb700 (LWP 1985)):
#0  0x00007fb74d685f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb7409f5694 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb7409f579c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb74a25ea76 in QEventDispatcherGlib::processEvents (this=0x7fb6980008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007fb74a2305ef in QEventLoop::processEvents (this=this@entry=0x7fb69e6cad70, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fb74a2308e5 in QEventLoop::exec (this=this@entry=0x7fb69e6cad70, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fb74a12f88f in QThread::exec (this=this@entry=0x1e393f0) at thread/qthread.cpp:542
#7  0x00007fb74a211d13 in QInotifyFileSystemWatcherEngine::run (this=0x1e393f0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007fb74a131f2f in QThreadPrivate::start (arg=0x1e393f0) at thread/qthread_unix.cpp:338
#9  0x00007fb7410fff6e in start_thread (arg=0x7fb69e6cb700) at pthread_create.c:311
#10 0x00007fb74d6929cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 5 (Thread 0x7fb6961d0700 (LWP 1986)):
#0  0x00007fb74d685f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb7409f5694 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb7409f579c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb74a25ea76 in QEventDispatcherGlib::processEvents (this=0x7fb6900008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007fb74a2305ef in QEventLoop::processEvents (this=this@entry=0x7fb6961cfd70, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fb74a2308e5 in QEventLoop::exec (this=this@entry=0x7fb6961cfd70, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fb74a12f88f in QThread::exec (this=this@entry=0x225d960) at thread/qthread.cpp:542
#7  0x00007fb74a211d13 in QInotifyFileSystemWatcherEngine::run (this=0x225d960) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007fb74a131f2f in QThreadPrivate::start (arg=0x225d960) at thread/qthread_unix.cpp:338
#9  0x00007fb7410fff6e in start_thread (arg=0x7fb6961d0700) at pthread_create.c:311
#10 0x00007fb74d6929cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7fb68f4ec700 (LWP 18645)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb74860e1cd in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fb74860e209 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fb7410fff6e in start_thread (arg=0x7fb68f4ec700) at pthread_create.c:311
#4  0x00007fb74d6929cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7fb68db56700 (LWP 18646)):
#0  0x00007fb74d685f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fb7409f5694 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb7409f579c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb74a25ea76 in QEventDispatcherGlib::processEvents (this=0x7fb688002600, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007fb74a2305ef in QEventLoop::processEvents (this=this@entry=0x7fb68db55db0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fb74a2308e5 in QEventLoop::exec (this=this@entry=0x7fb68db55db0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fb74a12f88f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7  0x00007fb74a131f2f in QThreadPrivate::start (arg=0x480a2c0) at thread/qthread_unix.cpp:338
#8  0x00007fb7410fff6e in start_thread (arg=0x7fb68db56700) at pthread_create.c:311
#9  0x00007fb74d6929cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7fb63e777700 (LWP 18649)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb74834ebbd in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007fb74863da76 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007fb7410fff6e in start_thread (arg=0x7fb63e777700) at pthread_create.c:311
#4  0x00007fb74d6929cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7fb74dda97c0 (LWP 1979)):
[KCrash Handler]
#6  QGraphicsItem::ungrabMouse (this=0xb1037b0) at graphicsview/qgraphicsitem.cpp:3522
#7  0x00007fb749b9b8af in QGraphicsScenePrivate::clearMouseGrabber (this=this@entry=0x106ba80) at graphicsview/qgraphicsscene.cpp:1004
#8  0x00007fb749b9e9cd in QGraphicsScenePrivate::sendMouseEvent (this=0x106ba80, mouseEvent=0x7fff40f18490) at graphicsview/qgraphicsscene.cpp:1279
#9  0x00007fb749ba76f6 in QGraphicsScene::mouseMoveEvent (this=<optimized out>, mouseEvent=0x7fff40f18490) at graphicsview/qgraphicsscene.cpp:4102
#10 0x00007fb749bb362c in QGraphicsScene::event (this=0xfeb3e0, event=0x7fff40f18490) at graphicsview/qgraphicsscene.cpp:3451
#11 0x00007fb7495cedfc in QApplicationPrivate::notify_helper (this=this@entry=0xfed2e0, receiver=receiver@entry=0xfeb3e0, e=e@entry=0x7fff40f18490) at kernel/qapplication.cpp:4567
#12 0x00007fb7495d5470 in QApplication::notify (this=this@entry=0xfc2a30, receiver=receiver@entry=0xfeb3e0, e=e@entry=0x7fff40f18490) at kernel/qapplication.cpp:4353
#13 0x00007fb74aef5a6a in KApplication::notify (this=0xfc2a30, receiver=0xfeb3e0, event=0x7fff40f18490) at ../../kdeui/kernel/kapplication.cpp:311
#14 0x00007fb74a2318bd in QCoreApplication::notifyInternal (this=0xfc2a30, receiver=0xfeb3e0, event=event@entry=0x7fff40f18490) at kernel/qcoreapplication.cpp:946
#15 0x00007fb7495cd526 in sendSpontaneousEvent (event=event@entry=0x7fff40f18490, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#16 qt_sendSpontaneousEvent (receiver=<optimized out>, event=event@entry=0x7fff40f18490) at kernel/qapplication.cpp:5565
#17 0x00007fb749bc88ac in QGraphicsViewPrivate::mouseMoveEventHandler (this=this@entry=0x2c5b200, event=event@entry=0x7fff40f18ae0) at graphicsview/qgraphicsview.cpp:646
#18 0x00007fb749bc97ba in QGraphicsView::mouseMoveEvent (this=0x2c5a890, event=0x7fff40f18ae0) at graphicsview/qgraphicsview.cpp:3276
#19 0x00007fb74961e445 in QWidget::event (this=this@entry=0x2c5a890, event=event@entry=0x7fff40f18ae0) at kernel/qwidget.cpp:8360
#20 0x00007fb7499bf5be in QFrame::event (this=0x2c5a890, e=0x7fff40f18ae0) at widgets/qframe.cpp:557
#21 0x00007fb749bcae09 in QGraphicsView::viewportEvent (this=0x2c5a890, event=0x7fff40f18ae0) at graphicsview/qgraphicsview.cpp:2866
#22 0x00007fb74a231a26 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0xfed2e0, receiver=receiver@entry=0x292bfb0, event=event@entry=0x7fff40f18ae0) at kernel/qcoreapplication.cpp:1056
#23 0x00007fb7495ceddc in QApplicationPrivate::notify_helper (this=this@entry=0xfed2e0, receiver=receiver@entry=0x292bfb0, e=e@entry=0x7fff40f18ae0) at kernel/qapplication.cpp:4563
#24 0x00007fb7495d55ad in QApplication::notify (this=this@entry=0xfc2a30, receiver=receiver@entry=0x292bfb0, e=e@entry=0x7fff40f18ae0) at kernel/qapplication.cpp:4110
#25 0x00007fb74aef5a6a in KApplication::notify (this=0xfc2a30, receiver=0x292bfb0, event=0x7fff40f18ae0) at ../../kdeui/kernel/kapplication.cpp:311
#26 0x00007fb74a2318bd in QCoreApplication::notifyInternal (this=0xfc2a30, receiver=receiver@entry=0x292bfb0, event=event@entry=0x7fff40f18ae0) at kernel/qcoreapplication.cpp:946
#27 0x00007fb7495d4d63 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#28 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0x292bfb0, event=event@entry=0x7fff40f18ae0, alienWidget=alienWidget@entry=0x292bfb0, nativeWidget=nativeWidget@entry=0x2c5a890, buttonDown=buttonDown@entry=0x7fb74a0b32f8 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#29 0x00007fb7496497db in QETWidget::translateMouseEvent (this=this@entry=0x2c5a890, event=event@entry=0x7fff40f18e60) at kernel/qapplication_x11.cpp:4631
#30 0x00007fb749648642 in QApplication::x11ProcessEvent (this=0xfc2a30, event=event@entry=0x7fff40f18e60) at kernel/qapplication_x11.cpp:3746
#31 0x00007fb749670922 in x11EventSourceDispatch (s=0xfeaea0, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#32 0x00007fb7409f53a6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007fb7409f56f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007fb7409f579c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007fb74a25ea55 in QEventDispatcherGlib::processEvents (this=0xfed9d0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#36 0x00007fb7496709d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#37 0x00007fb74a2305ef in QEventLoop::processEvents (this=this@entry=0x7fff40f19240, flags=...) at kernel/qeventloop.cpp:149
#38 0x00007fb74a2308e5 in QEventLoop::exec (this=this@entry=0x7fff40f19240, flags=...) at kernel/qeventloop.cpp:204
#39 0x00007fb74a235e5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#40 0x00007fb7495cd34c in QApplication::exec () at kernel/qapplication.cpp:3828
#41 0x00007fb74d99c27c in kdemain (argc=1, argv=0x7fff40f19498) at ../../../../plasma/desktop/shell/main.cpp:126
#42 0x00007fb74d5b9de5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7fff40f19498, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff40f19488) at libc-start.c:260
#43 0x000000000040070e in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 324844.

Possible duplicates by query: bug 325733, bug 325732, bug 324844.

Reported using DrKonqi