Bug 309118

Application: plasma-desktop (0.4)
KDE Platform Version: 4.9.2
Qt Version: 4.8.3
Operating System: Linux 3.5.0-17-generic x86_64
Distribution: Ubuntu 12.10

-- Information about the crash:
I was loading dia from the main menu. While it was loading I took a second to try and add it to the icon-only task manager by selecting "Show a Launcher when not running". When I selected it, dia still loaded normally but plasma crashed and restarted in the background.

-- 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 0x7f68c5d3b780 (LWP 1635))]

Thread 4 (Thread 0x7f68b4569700 (LWP 1639)):
#0  0x00007f68cd466ea0 in __pthread_mutex_lock (mutex=0x7f68ac000a60) at pthread_mutex_lock.c:56
#1  0x00007f68ccda2c31 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f68ccd65193 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f68ccd65d35 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f68ccd65ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f68d5d74c16 in QEventDispatcherGlib::processEvents (this=0x7f68ac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f68d5d452bf in QEventLoop::processEvents (this=this@entry=0x7f68b4568dd0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f68d5d45548 in QEventLoop::exec (this=0x7f68b4568dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f68d5c46b10 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007f68d5d259af in QInotifyFileSystemWatcherEngine::run (this=0x193fc80) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f68d5c49aec in QThreadPrivate::start (arg=0x193fc80) at thread/qthread_unix.cpp:338
#11 0x00007f68cd464e9a in start_thread (arg=0x7f68b4569700) at pthread_create.c:308
#12 0x00007f68d90cecbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f68b2f84700 (LWP 1640)):
#0  0x00007f68d5c487ef in QThreadData::current () at thread/qthread_unix.cpp:207
#1  0x00007f68d5d744d9 in postEventSourcePrepare (s=0x7f68a40012d0, timeout=0x7f68b2f83c14) at kernel/qeventdispatcher_glib.cpp:256
#2  0x00007f68ccd65618 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f68ccd65cab in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f68ccd65ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f68d5d74c16 in QEventDispatcherGlib::processEvents (this=0x7f68a40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f68d5d452bf in QEventLoop::processEvents (this=this@entry=0x7f68b2f83dd0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f68d5d45548 in QEventLoop::exec (this=0x7f68b2f83dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f68d5c46b10 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007f68d5d259af in QInotifyFileSystemWatcherEngine::run (this=0x1a62b70) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f68d5c49aec in QThreadPrivate::start (arg=0x1a62b70) at thread/qthread_unix.cpp:338
#11 0x00007f68cd464e9a in start_thread (arg=0x7f68b2f84700) at pthread_create.c:308
#12 0x00007f68d90cecbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f68ab7fe700 (LWP 1643)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f68d2dcbcd7 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f68d2dcbd09 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f68cd464e9a in start_thread (arg=0x7f68ab7fe700) at pthread_create.c:308
#4  0x00007f68d90cecbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f68c5d3b780 (LWP 1635)):
[KCrash Handler]
#6  operator== (value=0, this=0xd) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  data (this=0x1f8ac90) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:587
#8  TaskManager::TaskItem::task (this=0x4021630) at ../../../libs/taskmanager/taskitem.cpp:134
#9  0x00007f68bda2c7d8 in TaskManager::ToggleLauncherActionImpl::toggleLauncher (this=0x3784a90) at ../../../libs/taskmanager/taskactions.cpp:463
#10 0x00007f68d5d5bf5f in QMetaObject::activate (sender=0x3784a90, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff94c344b0) at kernel/qobject.cpp:3547
#11 0x00007f68d50e7a32 in QAction::triggered (this=this@entry=0x3784a90, _t1=true) at .moc/release-shared/moc_qaction.cpp:277
#12 0x00007f68d50e7c20 in QAction::activate (this=0x3784a90, event=<optimized out>) at kernel/qaction.cpp:1257
#13 0x00007f68d55263d3 in QMenuPrivate::activateCausedStack (this=this@entry=0x40da720, causedStack=..., action=action@entry=0x3784a90, action_e=action_e@entry=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1028
#14 0x00007f68d552c6b9 in QMenuPrivate::activateAction (this=0x40da720, action=0x3784a90, action_e=QAction::Trigger, self=<optimized out>) at widgets/qmenu.cpp:1120
#15 0x00007f68d513d850 in QWidget::event (this=0x7fff94c35b30, event=0x7fff94c34f10) at kernel/qwidget.cpp:8371
#16 0x00007f68d552d96b in QMenu::event (this=0x7fff94c35b30, e=0x7fff94c34f10) at widgets/qmenu.cpp:2469
#17 0x00007f68bda2b192 in TaskManager::ToolTipMenu::event (this=0x7fff94c35b30, e=0x7fff94c34f10) at ../../../libs/taskmanager/taskactions.cpp:167
#18 0x00007f68d50ede9c in QApplicationPrivate::notify_helper (this=this@entry=0xe60ab0, receiver=receiver@entry=0x7fff94c35b30, e=e@entry=0x7fff94c34f10) at kernel/qapplication.cpp:4562
#19 0x00007f68d50f2b6b in QApplication::notify (this=<optimized out>, receiver=0x7fff94c35b30, e=0x7fff94c34f10) at kernel/qapplication.cpp:4105
#20 0x00007f68d69ff1d6 in KApplication::notify (this=0xe4ae90, receiver=0x7fff94c35b30, event=0x7fff94c34f10) at ../../kdeui/kernel/kapplication.cpp:311
#21 0x00007f68d5d4656e in QCoreApplication::notifyInternal (this=0xe4ae90, receiver=0x7fff94c35b30, event=0x7fff94c34f10) at kernel/qcoreapplication.cpp:915
#22 0x00007f68d50eecd3 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#23 QApplicationPrivate::sendMouseEvent (receiver=0x7fff94c35b30, event=0x7fff94c34f10, alienWidget=0x0, nativeWidget=0x7fff94c35b30, buttonDown=0x7f68d5bca308 <qt_button_down>, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3173
#24 0x00007f68d516c41c in QETWidget::translateMouseEvent (this=this@entry=0x7fff94c35b30, event=event@entry=0x7fff94c35690) at kernel/qapplication_x11.cpp:4556
#25 0x00007f68d516b44f in QApplication::x11ProcessEvent (this=0xe4ae90, event=0x7fff94c35690) at kernel/qapplication_x11.cpp:3737
#26 0x00007f68d5192fa2 in x11EventSourceDispatch (s=0xe63400, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#27 0x00007f68ccd65ab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f68ccd65de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f68ccd65ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007f68d5d74bf6 in QEventDispatcherGlib::processEvents (this=0xddbad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#31 0x00007f68d5192c1e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#32 0x00007f68d5d452bf in QEventLoop::processEvents (this=this@entry=0x7fff94c35a70, flags=...) at kernel/qeventloop.cpp:149
#33 0x00007f68d5d45548 in QEventLoop::exec (this=0x7fff94c35a70, flags=...) at kernel/qeventloop.cpp:204
#34 0x00007f68d552a395 in QMenu::exec (this=0x7fff94c35b30, p=..., action=0x0) at widgets/qmenu.cpp:2113
#35 0x00007f68bd5734c4 in WindowTaskItem::showContextMenu (this=0x27f4380, pos=..., showAppMenu=<optimized out>) at ../../../applets/icontasks/windowtaskitem.cpp:419
#36 0x00007f68bd5725b3 in contextMenuEvent (this=0x27f4380, e=<optimized out>) at ../../../applets/icontasks/windowtaskitem.cpp:396
#37 WindowTaskItem::contextMenuEvent (this=0x27f4380, e=0x7fff94c36230) at ../../../applets/icontasks/windowtaskitem.cpp:389
#38 0x00007f68d56ae55d in QGraphicsItem::sceneEvent (this=0x27f4390, event=0x7fff94c36230) at graphicsview/qgraphicsitem.cpp:6711
#39 0x00007f68d56d749e in QGraphicsScene::contextMenuEvent (this=<optimized out>, contextMenuEvent=0x7fff94c36230) at graphicsview/qgraphicsscene.cpp:3617
#40 0x00007f68d56eb090 in QGraphicsScene::event (this=0x106c270, event=0x7fff94c36230) at graphicsview/qgraphicsscene.cpp:3412
#41 0x00007f68d50ede9c in QApplicationPrivate::notify_helper (this=this@entry=0xe60ab0, receiver=receiver@entry=0x106c270, e=e@entry=0x7fff94c36230) at kernel/qapplication.cpp:4562
#42 0x00007f68d50f230a in QApplication::notify (this=0xe4ae90, receiver=0x106c270, e=0x7fff94c36230) at kernel/qapplication.cpp:4423
#43 0x00007f68d69ff1d6 in KApplication::notify (this=0xe4ae90, receiver=0x106c270, event=0x7fff94c36230) at ../../kdeui/kernel/kapplication.cpp:311
#44 0x00007f68d5d4656e in QCoreApplication::notifyInternal (this=0xe4ae90, receiver=0x106c270, event=0x7fff94c36230) at kernel/qcoreapplication.cpp:915
#45 0x00007f68d56fc502 in sendEvent (event=0x7fff94c36230, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#46 QGraphicsView::contextMenuEvent (this=0x1a7b9e0, event=0x7fff94c36ae0) at graphicsview/qgraphicsview.cpp:2892
#47 0x00007f68d513d59a in QWidget::event (this=0x1a7b9e0, event=0x7fff94c36ae0) at kernel/qwidget.cpp:8538
#48 0x00007f68d54ecb66 in QFrame::event (this=0x1a7b9e0, e=0x7fff94c36ae0) at widgets/qframe.cpp:557
#49 0x00007f68d570495b in QGraphicsView::viewportEvent (this=0x1a7b9e0, event=0x7fff94c36ae0) at graphicsview/qgraphicsview.cpp:2866
#50 0x00007f68d5d466d6 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>, receiver=0x1a91720, event=0x7fff94c36ae0) at kernel/qcoreapplication.cpp:1025
#51 0x00007f68d50ede6c in QApplicationPrivate::notify_helper (this=this@entry=0xe60ab0, receiver=receiver@entry=0x1a91720, e=e@entry=0x7fff94c36ae0) at kernel/qapplication.cpp:4558
#52 0x00007f68d50f2875 in QApplication::notify (this=<optimized out>, receiver=0x1a91720, e=0x7fff94c36ae0) at kernel/qapplication.cpp:4184
#53 0x00007f68d69ff1d6 in KApplication::notify (this=0xe4ae90, receiver=0x1a91720, event=0x7fff94c36ae0) at ../../kdeui/kernel/kapplication.cpp:311
#54 0x00007f68d5d4656e in QCoreApplication::notifyInternal (this=0xe4ae90, receiver=0x1a91720, event=0x7fff94c36ae0) at kernel/qcoreapplication.cpp:915
#55 0x00007f68d516c5b1 in sendSpontaneousEvent (event=0x7fff94c36ae0, receiver=0x1a91720) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#56 QETWidget::translateMouseEvent (this=this@entry=0x1a7b9e0, event=event@entry=0x7fff94c37230) at kernel/qapplication_x11.cpp:4627
#57 0x00007f68d516b44f in QApplication::x11ProcessEvent (this=0xe4ae90, event=0x7fff94c37230) at kernel/qapplication_x11.cpp:3737
#58 0x00007f68d5192fa2 in x11EventSourceDispatch (s=0xe63400, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#59 0x00007f68ccd65ab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#60 0x00007f68ccd65de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#61 0x00007f68ccd65ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#62 0x00007f68d5d74bf6 in QEventDispatcherGlib::processEvents (this=0xddbad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#63 0x00007f68d5192c1e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#64 0x00007f68d5d452bf in QEventLoop::processEvents (this=this@entry=0x7fff94c37600, flags=...) at kernel/qeventloop.cpp:149
#65 0x00007f68d5d45548 in QEventLoop::exec (this=0x7fff94c37600, flags=...) at kernel/qeventloop.cpp:204
#66 0x00007f68d5d4a708 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#67 0x00007f68d93d5035 in kdemain (argc=1, argv=0x7fff94c378f8) at ../../../../plasma/desktop/shell/main.cpp:120
#68 0x00007f68d8ffc76d in __libc_start_main (main=0x4006a0 <main(int, char**)>, argc=1, ubp_av=0x7fff94c378f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff94c378e8) at libc-start.c:226
#69 0x00000000004006d1 in _start ()

This bug may be a duplicate of or related to bug 272495.

Possible duplicates by query: bug 301910, bug 290152, bug 289482.

Reported using DrKonqi