Bug 284903

Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.5 (4.6.5)
Qt Version: 4.7.4
Operating System: Linux 2.6.40.6-0.fc15.i686 i686
Distribution (Platform): Fedora RPMs

-- Information about the crash:
- What I was doing when the application crashed:
dragging the application launcher app V1.0 from the add widget bar to the task bar after accidentally removing all items from the task bar
- Unusual behavior I noticed:
just the crash (screen went black momentarily before launching the crash reporter)

- Custom settings of the application:
none known

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76e7780 (LWP 1270))]

Thread 5 (Thread 0xaecffb70 (LWP 1548)):
#0  0x00ca3416 in __kernel_vsyscall ()
#1  0x002a414c in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S:172
#2  0x048d4618 in wait (time=4294967295, this=0x8bf3e88) at thread/qwaitcondition_unix.cpp:88
#3  QWaitCondition::wait (this=0x8c24f90, mutex=0x8bd9968, time=4294967295) at thread/qwaitcondition_unix.cpp:160
#4  0x001639c7 in ?? () from /usr/lib/libthreadweaver.so.4
#5  0x0016658c in ?? () from /usr/lib/libthreadweaver.so.4
#6  0x001635eb in ?? () from /usr/lib/libthreadweaver.so.4
#7  0x0016669c in ?? () from /usr/lib/libthreadweaver.so.4
#8  0x00163544 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0x001666b8 in ?? () from /usr/lib/libthreadweaver.so.4
#10 0x00163544 in ?? () from /usr/lib/libthreadweaver.so.4
#11 0x001666b8 in ?? () from /usr/lib/libthreadweaver.so.4
#12 0x00163544 in ?? () from /usr/lib/libthreadweaver.so.4
#13 0x00165144 in ?? () from /usr/lib/libthreadweaver.so.4
#14 0x0016520b in ThreadWeaver::Thread::run() () from /usr/lib/libthreadweaver.so.4
#15 0x048d4104 in QThreadPrivate::start (arg=0x8ee84f8) at thread/qthread_unix.cpp:331
#16 0x002a0a2e in start_thread (arg=0xaecffb70) at pthread_create.c:305
#17 0x0218d34e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:133

Thread 4 (Thread 0xaf6ffb70 (LWP 1549)):
#0  0x00ca3416 in __kernel_vsyscall ()
#1  0x002a414c in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S:172
#2  0x048d4618 in wait (time=4294967295, this=0x8bf3e88) at thread/qwaitcondition_unix.cpp:88
#3  QWaitCondition::wait (this=0x8c24f90, mutex=0x8bd9968, time=4294967295) at thread/qwaitcondition_unix.cpp:160
#4  0x001639c7 in ?? () from /usr/lib/libthreadweaver.so.4
#5  0x0016658c in ?? () from /usr/lib/libthreadweaver.so.4
#6  0x001635eb in ?? () from /usr/lib/libthreadweaver.so.4
#7  0x0016669c in ?? () from /usr/lib/libthreadweaver.so.4
#8  0x00163544 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0x00165144 in ?? () from /usr/lib/libthreadweaver.so.4
#10 0x0016520b in ThreadWeaver::Thread::run() () from /usr/lib/libthreadweaver.so.4
#11 0x048d4104 in QThreadPrivate::start (arg=0x8d66f30) at thread/qthread_unix.cpp:331
#12 0x002a0a2e in start_thread (arg=0xaf6ffb70) at pthread_create.c:305
#13 0x0218d34e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:133

Thread 3 (Thread 0xaa9bcb70 (LWP 1550)):
#0  0x00ca3416 in __kernel_vsyscall ()
#1  0x002a414c in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S:172
#2  0x048d4618 in wait (time=4294967295, this=0x8bf3e88) at thread/qwaitcondition_unix.cpp:88
#3  QWaitCondition::wait (this=0x8c24f90, mutex=0x8bd9968, time=4294967295) at thread/qwaitcondition_unix.cpp:160
#4  0x001639c7 in ?? () from /usr/lib/libthreadweaver.so.4
#5  0x0016658c in ?? () from /usr/lib/libthreadweaver.so.4
#6  0x001635eb in ?? () from /usr/lib/libthreadweaver.so.4
#7  0x0016669c in ?? () from /usr/lib/libthreadweaver.so.4
#8  0x00163544 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0x001666b8 in ?? () from /usr/lib/libthreadweaver.so.4
#10 0x00163544 in ?? () from /usr/lib/libthreadweaver.so.4
#11 0x001666b8 in ?? () from /usr/lib/libthreadweaver.so.4
#12 0x00163544 in ?? () from /usr/lib/libthreadweaver.so.4
#13 0x001666b8 in ?? () from /usr/lib/libthreadweaver.so.4
#14 0x00163544 in ?? () from /usr/lib/libthreadweaver.so.4
#15 0x001666b8 in ?? () from /usr/lib/libthreadweaver.so.4
#16 0x00163544 in ?? () from /usr/lib/libthreadweaver.so.4
#17 0x00165144 in ?? () from /usr/lib/libthreadweaver.so.4
#18 0x0016520b in ThreadWeaver::Thread::run() () from /usr/lib/libthreadweaver.so.4
#19 0x048d4104 in QThreadPrivate::start (arg=0x8ccd240) at thread/qthread_unix.cpp:331
#20 0x002a0a2e in start_thread (arg=0xaa9bcb70) at pthread_create.c:305
#21 0x0218d34e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:133

Thread 2 (Thread 0xaa1bbb70 (LWP 1551)):
#0  0x00ca3416 in __kernel_vsyscall ()
#1  0x002a414c in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S:172
#2  0x048d4618 in wait (time=4294967295, this=0x8bf3e88) at thread/qwaitcondition_unix.cpp:88
#3  QWaitCondition::wait (this=0x8c24f90, mutex=0x8bd9968, time=4294967295) at thread/qwaitcondition_unix.cpp:160
#4  0x001639c7 in ?? () from /usr/lib/libthreadweaver.so.4
#5  0x0016658c in ?? () from /usr/lib/libthreadweaver.so.4
#6  0x001635eb in ?? () from /usr/lib/libthreadweaver.so.4
#7  0x0016669c in ?? () from /usr/lib/libthreadweaver.so.4
#8  0x00163544 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0x00165144 in ?? () from /usr/lib/libthreadweaver.so.4
#10 0x0016520b in ThreadWeaver::Thread::run() () from /usr/lib/libthreadweaver.so.4
#11 0x048d4104 in QThreadPrivate::start (arg=0x8f51f08) at thread/qthread_unix.cpp:331
#12 0x002a0a2e in start_thread (arg=0xaa1bbb70) at pthread_create.c:305
#13 0x0218d34e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:133

Thread 1 (Thread 0xb76e7780 (LWP 1270)):
[KCrash Handler]
#7  0x081d1d28 in sceneEventFilter (event=0xbfa9350c, watched=0x87b3d10, this=0x878e508) at /usr/src/debug/kdeplasma-addons-4.6.5/containments/groupingdesktop/lib/groupingcontainment.cpp:732
#8  GroupingContainment::sceneEventFilter (this=0x878e508, watched=0x87b3d10, event=0xbfa9350c) at /usr/src/debug/kdeplasma-addons-4.6.5/containments/groupingdesktop/lib/groupingcontainment.cpp:686
#9  0x01944ded in QGraphicsScenePrivate::filterEvent (this=0x8500cd0, item=0x87b3d10, event=0xbfa9350c) at graphicsview/qgraphicsscene.cpp:1165
#10 0x01944e92 in QGraphicsScenePrivate::sendEvent (this=0x8500cd0, item=0x87b3d10, event=0xbfa9350c) at graphicsview/qgraphicsscene.cpp:1193
#11 0x01945d46 in QGraphicsScenePrivate::sendHoverEvent (this=0x1, type=QEvent::Timer, item=0x87b3d10, hoverEvent=0xbfa935fc) at graphicsview/qgraphicsscene.cpp:1252
#12 0x0194631e in QGraphicsScenePrivate::dispatchHoverEvent (this=0x8500cd0, hoverEvent=0xbfa935fc) at graphicsview/qgraphicsscene.cpp:3919
#13 0x01946745 in QGraphicsScene::mouseMoveEvent (this=0x84fa598, mouseEvent=0xbfa93b44) at graphicsview/qgraphicsscene.cpp:4078
#14 0x01955220 in QGraphicsScene::event (this=0x84fa598, event=0xbfa93b44) at graphicsview/qgraphicsscene.cpp:3434
#15 0x012b7bb4 in notify_helper (e=0xbfa93b44, receiver=0x84fa598, this=0x84fc940) at kernel/qapplication.cpp:4481
#16 QApplicationPrivate::notify_helper (this=0x84fc940, receiver=0x84fa598, e=0xbfa93b44) at kernel/qapplication.cpp:4453
#17 0x012bcff3 in QApplication::notify (this=0xbfa93b44, receiver=0x84fa598, e=0xbfa93b44) at kernel/qapplication.cpp:4228
#18 0x050428c2 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#19 0x049d03be in QCoreApplication::notifyInternal (this=0x84ef408, receiver=0x84fa598, event=0xbfa93b44) at kernel/qcoreapplication.cpp:787
#20 0x012b5c0e in sendSpontaneousEvent (event=0xbfa93b44, receiver=0x84fa598) at ../../src/corelib/kernel/qcoreapplication.h:218
#21 qt_sendSpontaneousEvent (receiver=0x84fa598, event=0xbfa93b44) at kernel/qapplication.cpp:5475
#22 0x0197288a in QGraphicsViewPrivate::mouseMoveEventHandler (this=0x8ae29e0, event=0xbfa94334) at graphicsview/qgraphicsview.cpp:647
#23 0x01972aff in QGraphicsView::mouseMoveEvent (this=0x8beb980, event=0xbfa94334) at graphicsview/qgraphicsview.cpp:3274
#24 0x01312ac1 in QWidget::event (this=0x8beb980, event=0xbfa94334) at kernel/qwidget.cpp:8280
#25 0x01717026 in QFrame::event (this=0x8beb980, e=0xbfa94334) at widgets/qframe.cpp:557
#26 0x017a9ac2 in QAbstractScrollArea::viewportEvent (this=0x8beb980, e=0xbfa94334) at widgets/qabstractscrollarea.cpp:1043
#27 0x0197799c in QGraphicsView::viewportEvent (this=0x8beb980, event=0xbfa94334) at graphicsview/qgraphicsview.cpp:2864
#28 0x017ac246 in viewportEvent (this=<optimized out>, event=0xbfa94334) at widgets/qabstractscrollarea_p.h:100
#29 eventFilter (e=0xbfa94334, this=<optimized out>, o=<optimized out>) at widgets/qabstractscrollarea_p.h:116
#30 QAbstractScrollAreaFilter::eventFilter (this=0x8ba3f70, o=0x8c19058, e=0xbfa94334) at widgets/qabstractscrollarea_p.h:115
#31 0x049d0566 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x84fc940, receiver=0x8c19058, event=0xbfa94334) at kernel/qcoreapplication.cpp:902
#32 0x012b7b83 in notify_helper (e=0xbfa94334, receiver=0x8c19058, this=0x84fc940) at kernel/qapplication.cpp:4477
#33 QApplicationPrivate::notify_helper (this=0x84fc940, receiver=0x8c19058, e=0xbfa94334) at kernel/qapplication.cpp:4453
#34 0x012bdd4a in QApplication::notify (this=0x84fc940, receiver=0x8c19058, e=0xbfa94334) at kernel/qapplication.cpp:4042
#35 0x050428c2 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#36 0x049d03be in QCoreApplication::notifyInternal (this=0x84ef408, receiver=0x8c19058, event=0xbfa94334) at kernel/qcoreapplication.cpp:787
#37 0x012b8b86 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:215
#38 QApplicationPrivate::sendMouseEvent (receiver=0x8c19058, event=0xbfa94334, alienWidget=0x8c19058, nativeWidget=0x8beb980, buttonDown=0x1c17af4, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3141
#39 0x01342e4c in QETWidget::translateMouseEvent (this=0x8beb980, event=0xbfa947ec) at kernel/qapplication_x11.cpp:4461
#40 0x01341b11 in QApplication::x11ProcessEvent (this=0x0, event=0xbfa947ec) at kernel/qapplication_x11.cpp:3601
#41 0x0136ca55 in x11EventSourceDispatch (s=0x84ff800, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:148
#42 0x074065bf in g_main_dispatch (context=0x84fea70) at gmain.c:2441
#43 g_main_context_dispatch (context=0x84fea70) at gmain.c:3014
#44 0x07406d30 in g_main_context_iterate (context=0x84fea70, block=121723520, dispatch=1, self=0x8501030) at gmain.c:3092
#45 0x0740706f in g_main_context_iteration (context=0x84fea70, may_block=1) at gmain.c:3155
#46 0x049feab8 in QEventDispatcherGlib::processEvents (this=0x84b6b60, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#47 0x0136c6eb in QGuiEventDispatcherGlib::processEvents (this=0x84b6b60, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#48 0x049cf6fe in QEventLoop::processEvents (this=0x92dbc40, flags=...) at kernel/qeventloop.cpp:149
#49 0x049cf951 in QEventLoop::exec (this=0x92dbc40, flags=...) at kernel/qeventloop.cpp:201
#50 0x01351b5d in QDragManager::drag (this=0x8a80380, o=0x8c13ef8) at kernel/qdnd_x11.cpp:1981
#51 0x012cba82 in QDrag::exec (this=0x8c13ef8, supportedActions=..., defaultDropAction=Qt::IgnoreAction) at kernel/qdrag.cpp:284
#52 0x012cbb36 in QDrag::exec (this=0x8c13ef8, supportedActions=...) at kernel/qdrag.cpp:239
#53 0x00fa63f4 in Plasma::ExtenderItem::mouseMoveEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libplasma.so.3
#54 0x0191b357 in QGraphicsItem::sceneEvent (this=0x8b49650, event=0xbfa954a4) at graphicsview/qgraphicsitem.cpp:6724
#55 0x01979597 in QGraphicsWidget::sceneEvent (this=0x8b49648, event=0xbfa954a4) at graphicsview/qgraphicswidget.cpp:1223
#56 0x01944f2e in sendEvent (event=0xbfa954a4, item=0x8b49650, this=<optimized out>) at graphicsview/qgraphicsscene.cpp:1205
#57 QGraphicsScenePrivate::sendEvent (this=0x8500cd0, item=0x8b49650, event=0xbfa954a4) at graphicsview/qgraphicsscene.cpp:1181
#58 0x01945b67 in QGraphicsScenePrivate::sendMouseEvent (this=0x8500cd0, mouseEvent=0xbfa954a4) at graphicsview/qgraphicsscene.cpp:1279
#59 0x019466e4 in QGraphicsScene::mouseMoveEvent (this=0x84fa598, mouseEvent=0xbfa954a4) at graphicsview/qgraphicsscene.cpp:4083
#60 0x01955220 in QGraphicsScene::event (this=0x84fa598, event=0xbfa954a4) at graphicsview/qgraphicsscene.cpp:3434
#61 0x012b7bb4 in notify_helper (e=0xbfa954a4, receiver=0x84fa598, this=0x84fc940) at kernel/qapplication.cpp:4481
#62 QApplicationPrivate::notify_helper (this=0x84fc940, receiver=0x84fa598, e=0xbfa954a4) at kernel/qapplication.cpp:4453
#63 0x012bcff3 in QApplication::notify (this=0xbfa954a4, receiver=0x84fa598, e=0xbfa954a4) at kernel/qapplication.cpp:4228
#64 0x050428c2 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#65 0x049d03be in QCoreApplication::notifyInternal (this=0x84ef408, receiver=0x84fa598, event=0xbfa954a4) at kernel/qcoreapplication.cpp:787
#66 0x012b5c0e in sendSpontaneousEvent (event=0xbfa954a4, receiver=0x84fa598) at ../../src/corelib/kernel/qcoreapplication.h:218
#67 qt_sendSpontaneousEvent (receiver=0x84fa598, event=0xbfa954a4) at kernel/qapplication.cpp:5475
#68 0x0197288a in QGraphicsViewPrivate::mouseMoveEventHandler (this=0x8be9300, event=0xbfa95c94) at graphicsview/qgraphicsview.cpp:647
#69 0x01972aff in QGraphicsView::mouseMoveEvent (this=0x876f360, event=0xbfa95c94) at graphicsview/qgraphicsview.cpp:3274
#70 0x01312ac1 in QWidget::event (this=0x876f360, event=0xbfa95c94) at kernel/qwidget.cpp:8280
#71 0x01717026 in QFrame::event (this=0x876f360, e=0xbfa95c94) at widgets/qframe.cpp:557
#72 0x017a9ac2 in QAbstractScrollArea::viewportEvent (this=0x876f360, e=0xbfa95c94) at widgets/qabstractscrollarea.cpp:1043
#73 0x0197799c in QGraphicsView::viewportEvent (this=0x876f360, event=0xbfa95c94) at graphicsview/qgraphicsview.cpp:2864
#74 0x017ac246 in viewportEvent (this=<optimized out>, event=0xbfa95c94) at widgets/qabstractscrollarea_p.h:100
#75 eventFilter (e=0xbfa95c94, this=<optimized out>, o=<optimized out>) at widgets/qabstractscrollarea_p.h:116
#76 QAbstractScrollAreaFilter::eventFilter (this=0x8a97a20, o=0x8beb138, e=0xbfa95c94) at widgets/qabstractscrollarea_p.h:115
#77 0x049d0566 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x84fc940, receiver=0x8beb138, event=0xbfa95c94) at kernel/qcoreapplication.cpp:902
#78 0x012b7b83 in notify_helper (e=0xbfa95c94, receiver=0x8beb138, this=0x84fc940) at kernel/qapplication.cpp:4477
#79 QApplicationPrivate::notify_helper (this=0x84fc940, receiver=0x8beb138, e=0xbfa95c94) at kernel/qapplication.cpp:4453
#80 0x012bdd4a in QApplication::notify (this=0x84fc940, receiver=0x8beb138, e=0xbfa95c94) at kernel/qapplication.cpp:4042
#81 0x050428c2 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#82 0x049d03be in QCoreApplication::notifyInternal (this=0x84ef408, receiver=0x8beb138, event=0xbfa95c94) at kernel/qcoreapplication.cpp:787
#83 0x012b8b86 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:215
#84 QApplicationPrivate::sendMouseEvent (receiver=0x8beb138, event=0xbfa95c94, alienWidget=0x8beb138, nativeWidget=0x8b3bf40, buttonDown=0x1c17af4, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3141
#85 0x01342e4c in QETWidget::translateMouseEvent (this=0x8b3bf40, event=0xbfa9614c) at kernel/qapplication_x11.cpp:4461
#86 0x01341e0d in QApplication::x11ProcessEvent (this=0x84ef408, event=0xbfa9614c) at kernel/qapplication_x11.cpp:3587
#87 0x0136ca55 in x11EventSourceDispatch (s=0x84ff800, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:148
#88 0x074065bf in g_main_dispatch (context=0x84fea70) at gmain.c:2441
#89 g_main_context_dispatch (context=0x84fea70) at gmain.c:3014
#90 0x07406d30 in g_main_context_iterate (context=0x84fea70, block=121723520, dispatch=1, self=0x8501030) at gmain.c:3092
#91 0x0740706f in g_main_context_iteration (context=0x84fea70, may_block=1) at gmain.c:3155
#92 0x049feab8 in QEventDispatcherGlib::processEvents (this=0x84b6b60, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#93 0x0136c6eb in QGuiEventDispatcherGlib::processEvents (this=0x84b6b60, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#94 0x049cf6fe in QEventLoop::processEvents (this=0xbfa96454, flags=...) at kernel/qeventloop.cpp:149
#95 0x049cf951 in QEventLoop::exec (this=0xbfa96454, flags=...) at kernel/qeventloop.cpp:201
#96 0x049d40bb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#97 0x012b5995 in QApplication::exec () at kernel/qapplication.cpp:3755
#98 0x001a2dd6 in kdemain (argc=1, argv=0xbfa96654) at /usr/src/debug/kdebase-workspace-4.6.5/plasma/desktop/shell/main.cpp:120
#99 0x0804876c in main (argc=1, argv=0xbfa96654) at /usr/src/debug/kdebase-workspace-4.6.5/i686-redhat-linux-gnu/plasma/desktop/shell/plasma-desktop_dummy.cpp:3

This bug may be a duplicate of or related to bug 268433.

Possible duplicates by query: bug 272464, bug 272359, bug 268433, bug 268424, bug 262557.

Reported using DrKonqi