Application: plasma-desktop (0.4)
KDE Platform Version: 4.9.2 "release 511"
Qt Version: 4.8.3
Operating System: Linux 3.4.16-1-desktop x86_64
Distribution: "openSUSE 12.2 (x86_64)"

-- Information about the crash:
1) Open four dolphin and four konqueror windows
2) Activate "Only show tasks from currrent desktop" task manager option
3) minimize some windows
4) switch virtual desktop
Unexpected result: plasma crashed.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ffced3d6780 (LWP 3876))]

Thread 3 (Thread 0x7ffcc3fff700 (LWP 3880)):
#0  0x00007ffcebcc7cec in pthread_mutex_lock () from /lib64/libpthread.so.0
#1  0x00007ffce77bb471 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#2  0x00007ffce777eec9 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#3  0x00007ffce777f5ab in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007ffce777f7a4 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007ffcec085cf6 in QEventDispatcherGlib::processEvents (this=0x7ffcbc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007ffcec05685f in QEventLoop::processEvents (this=this@entry=0x7ffcc3ffedd0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007ffcec056ae8 in QEventLoop::exec (this=0x7ffcc3ffedd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007ffcebf58fc0 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007ffcec036fcf in QInotifyFileSystemWatcherEngine::run (this=0x1c3c6a0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007ffcebf5bf9c in QThreadPrivate::start (arg=0x1c3c6a0) at thread/qthread_unix.cpp:338
#11 0x00007ffcebcc5e0e in start_thread () from /lib64/libpthread.so.0
#12 0x00007ffceaa3f2bd in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7ffcc37fe700 (LWP 3881)):
#0  0x00007ffcebcc98f4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007ffce0b97247 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7ffce0ea4640 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007ffce0b97279 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007ffcebcc5e0e in start_thread () from /lib64/libpthread.so.0
#4  0x00007ffceaa3f2bd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7ffced3d6780 (LWP 3876)):
[KCrash Handler]
#6  0x0000007000000004 in ?? ()
#7  0x00007ffcd123ecfe in TaskItemLayout::size (this=this@entry=0x1ffd7a0) at /usr/src/debug/kde-workspace-4.9.2/plasma/desktop/applets/tasks/taskitemlayout.cpp:173
#8  0x00007ffcd123eed2 in TaskItemLayout::gridLayoutSize (this=this@entry=0x1ffd7a0) at /usr/src/debug/kde-workspace-4.9.2/plasma/desktop/applets/tasks/taskitemlayout.cpp:256
#9  0x00007ffcd123ef6e in TaskItemLayout::layoutItems (this=this@entry=0x1ffd7a0) at /usr/src/debug/kde-workspace-4.9.2/plasma/desktop/applets/tasks/taskitemlayout.cpp:281
#10 0x00007ffcd123f6b7 in TaskItemLayout::remove (this=0x1ffd7a0, item=0x34405e0) at /usr/src/debug/kde-workspace-4.9.2/plasma/desktop/applets/tasks/taskitemlayout.cpp:153
#11 0x00007ffcd123f6ed in qt_static_metacall (_a=<optimized out>, _o=<optimized out>, _c=<optimized out>, _id=<optimized out>) at /usr/src/debug/kde-workspace-4.9.2/build/plasma/desktop/applets/tasks/taskitemlayout.moc:50
#12 TaskItemLayout::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at /usr/src/debug/kde-workspace-4.9.2/build/plasma/desktop/applets/tasks/taskitemlayout.moc:44
#13 0x00007ffcec06e39f in QMetaObject::activate (sender=0x34405e0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffc8a3cd50) at kernel/qobject.cpp:3556
#14 0x00007ffcd1244392 in AbstractTaskItem::destroyed (this=this@entry=0x34405e0, _t1=_t1@entry=0x34405e0) at /usr/src/debug/kde-workspace-4.9.2/build/plasma/desktop/applets/tasks/abstracttaskitem.moc:169
#15 0x00007ffcd12448f4 in AbstractTaskItem::~AbstractTaskItem (this=0x34405e0, __in_chrg=<optimized out>) at /usr/src/debug/kde-workspace-4.9.2/plasma/desktop/applets/tasks/abstracttaskitem.cpp:163
#16 0x00007ffcd1239505 in ~WindowTaskItem (this=0x34405e0, __in_chrg=<optimized out>) at /usr/src/debug/kde-workspace-4.9.2/plasma/desktop/applets/tasks/windowtaskitem.h:34
#17 WindowTaskItem::~WindowTaskItem (this=0x34405e0, __in_chrg=<optimized out>) at /usr/src/debug/kde-workspace-4.9.2/plasma/desktop/applets/tasks/windowtaskitem.h:34
#18 0x00007ffceb7adbc4 in QGraphicsItem::~QGraphicsItem (this=0x330a500, __in_chrg=<optimized out>) at graphicsview/qgraphicsitem.cpp:1493
#19 0x00007ffceb7fd924 in ~QGraphicsObject (this=0x330a4f0, __in_chrg=<optimized out>) at ../../src/gui/graphicsview/qgraphicsitem.h:547
#20 QGraphicsWidget::~QGraphicsWidget (this=0x330a4f0, __in_chrg=<optimized out>) at graphicsview/qgraphicswidget.cpp:232
#21 0x00007ffcd1247949 in TaskGroupItem::~TaskGroupItem (this=0x330a4f0, __in_chrg=<optimized out>) at /usr/src/debug/kde-workspace-4.9.2/plasma/desktop/applets/tasks/taskgroupitem.cpp:87
#22 0x00007ffcec06c518 in QObject::event (this=0x330a4f0, e=<optimized out>) at kernel/qobject.cpp:1185
#23 0x00007ffceb7f9a9b in QGraphicsWidget::event (this=0x330a4f0, event=0x1c051f0) at graphicsview/qgraphicswidget.cpp:1461
#24 0x00007ffceb1e674c in QApplicationPrivate::notify_helper (this=this@entry=0x1556e80, receiver=receiver@entry=0x330a4f0, e=e@entry=0x1c051f0) at kernel/qapplication.cpp:4557
#25 0x00007ffceb1eabca in QApplication::notify (this=0x15363c0, receiver=0x330a4f0, e=0x1c051f0) at kernel/qapplication.cpp:4418
#26 0x00007ffcecdf0616 in KApplication::notify (this=0x15363c0, receiver=0x330a4f0, event=0x1c051f0) at /usr/src/debug/kdelibs-4.9.2/kdeui/kernel/kapplication.cpp:311
#27 0x00007ffcec057b0e in QCoreApplication::notifyInternal (this=0x15363c0, receiver=receiver@entry=0x330a4f0, event=event@entry=0x1c051f0) at kernel/qcoreapplication.cpp:915
#28 0x00007ffcec05b471 in sendEvent (event=0x1c051f0, receiver=0x330a4f0) at kernel/qcoreapplication.h:231
#29 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x14932b0) at kernel/qcoreapplication.cpp:1539
#30 0x00007ffcec085b43 in sendPostedEvents () at kernel/qcoreapplication.h:236
#31 postEventSourceDispatch (s=0x1556bd0) at kernel/qeventdispatcher_glib.cpp:279
#32 0x00007ffce777f3b5 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#33 0x00007ffce777f6e8 in ?? () from /usr/lib64/libglib-2.0.so.0
#34 0x00007ffce777f7a4 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#35 0x00007ffcec085cd6 in QEventDispatcherGlib::processEvents (this=0x154f5d0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#36 0x00007ffceb286a5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#37 0x00007ffcec05685f in QEventLoop::processEvents (this=this@entry=0x7fffc8a3d7e0, flags=...) at kernel/qeventloop.cpp:149
#38 0x00007ffcec056ae8 in QEventLoop::exec (this=0x7fffc8a3d7e0, flags=...) at kernel/qeventloop.cpp:204
#39 0x00007ffcec05b788 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#40 0x00007ffcda5e54b5 in kdemain (argc=1, argv=0x1495e50) at /usr/src/debug/kde-workspace-4.9.2/plasma/desktop/shell/main.cpp:120
#41 0x0000000000408932 in _start ()

This bug may be a duplicate of or related to bug 309240.

Possible duplicates by query: bug 309240, bug 300852, bug 298848, bug 294488.

Reported using DrKonqi