Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.8.0
Operating System: Linux 3.1.0-7.fc16.x86_64 x86_64

-- Information about the crash:
Plasma crashes after trying to ad firefox to the default panel

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f542e896840 (LWP 1283))]

Thread 2 (Thread 0x7f540a9b0700 (LWP 1475)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:165
#1  0x00007f542e3ace62 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f542e6a6240) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f542e3ace99 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f542cedbd90 in start_thread (arg=0x7f540a9b0700) at pthread_create.c:309
#4  0x00007f542bcd148d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f542e896840 (LWP 1283)):
[KCrash Handler]
#6  QGraphicsLayoutItemPrivate::hasHeightForWidth (this=0x740065006e002e) at graphicsview/qgraphicslayoutitem.cpp:346
#7  0x00007f542ca1f971 in QGridLayoutItem::hasDynamicConstraint (this=0x331bb20) at graphicsview/qgridlayoutengine.cpp:576
#8  0x00007f542ca20ad2 in ensureDynamicConstraint (this=0x3338490) at graphicsview/qgridlayoutengine.cpp:1666
#9  QGridLayoutEngine::ensureDynamicConstraint (this=0x3338490) at graphicsview/qgridlayoutengine.cpp:1661
#10 0x00007f542ca20b89 in QGridLayoutEngine::hasDynamicConstraint (this=0x3338490) at graphicsview/qgridlayoutengine.cpp:1686
#11 0x00007f542ca24ad8 in QGridLayoutEngine::sizeHint (this=0x3338490, styleInfo=..., which=Qt::MaximumSize, constraint=...) at graphicsview/qgridlayoutengine.cpp:1143
#12 0x00007f542c9ae4ca in QGraphicsGridLayout::sizeHint (this=<optimized out>, which=Qt::MaximumSize, constraint=...) at graphicsview/qgraphicsgridlayout.cpp:670
#13 0x00007f542c9d9052 in QGraphicsLayoutItemPrivate::effectiveSizeHints (this=0x3338380, constraint=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:235
#14 0x00007f542c9d9a71 in effectiveSizeHint (constraint=<optimized out>, which=<optimized out>, this=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:879
#15 QGraphicsLayoutItem::effectiveSizeHint (this=<optimized out>, which=<optimized out>, constraint=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:871
#16 0x00007f542ca163b1 in QGraphicsWidget::sizeHint (this=<optimized out>, which=<optimized out>, constraint=<optimized out>) at graphicsview/qgraphicswidget.cpp:743
#17 0x00007f542c9d9164 in QGraphicsLayoutItemPrivate::effectiveSizeHints (this=0x3338290, constraint=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:241
#18 0x00007f542c9d9a71 in effectiveSizeHint (constraint=<optimized out>, which=<optimized out>, this=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:879
#19 QGraphicsLayoutItem::effectiveSizeHint (this=<optimized out>, which=<optimized out>, constraint=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:871
#20 0x00007f5419d83af5 in SystemTray::TaskArea::adjustHiddentTasksWidget (this=0x32d8600) at /usr/src/debug/kdebase-workspace-4.7.2/kdebase-workspace-4.7.2/plasma/generic/applets/systemtray/ui/taskarea.cpp:452
#21 0x00007f5419d857c9 in SystemTray::TaskArea::addWidgetForTask (this=0x32d8600, task=0x3311aa0) at /usr/src/debug/kdebase-workspace-4.7.2/kdebase-workspace-4.7.2/plasma/generic/applets/systemtray/ui/taskarea.cpp:320
#22 0x00007f5419d85b16 in SystemTray::TaskArea::addTask (this=0x32d8600, task=<optimized out>) at /usr/src/debug/kdebase-workspace-4.7.2/kdebase-workspace-4.7.2/plasma/generic/applets/systemtray/ui/taskarea.cpp:196
#23 0x00007f542d27cce1 in QMetaObject::activate (sender=0x16408b0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffe46f4580) at kernel/qobject.cpp:3547
#24 0x00007f5419d68c9f in SystemTray::Manager::taskAdded (this=<optimized out>, _t1=0x3311aa0) at /usr/src/debug/kdebase-workspace-4.7.2/kdebase-workspace-4.7.2/x86_64-redhat-linux-gnu/plasma/generic/applets/systemtray/manager.moc:113
#25 0x00007f5419d68eb5 in SystemTray::Manager::addTask (this=0x16408b0, task=0x3311aa0) at /usr/src/debug/kdebase-workspace-4.7.2/kdebase-workspace-4.7.2/plasma/generic/applets/systemtray/core/manager.cpp:87
#26 0x00007f542d27cce1 in QMetaObject::activate (sender=0x16403f0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fffe46f4730) at kernel/qobject.cpp:3547
#27 0x00007f5419d6947f in SystemTray::Protocol::taskCreated (this=<optimized out>, _t1=0x3311aa0) at /usr/src/debug/kdebase-workspace-4.7.2/kdebase-workspace-4.7.2/x86_64-redhat-linux-gnu/plasma/generic/applets/systemtray/protocol.moc:105
#28 0x00007f5419d70568 in SystemTray::PlasmoidProtocol::addApplet (this=0x16403f0, appletName=..., id=<optimized out>, parent=0x33340f0) at /usr/src/debug/kdebase-workspace-4.7.2/kdebase-workspace-4.7.2/plasma/generic/applets/systemtray/protocols/plasmoid/plasmoidtaskprotocol.cpp:112
#29 0x00007f5419d68af6 in SystemTray::Manager::addApplet (this=<optimized out>, appletName=<optimized out>, parent=<optimized out>) at /usr/src/debug/kdebase-workspace-4.7.2/kdebase-workspace-4.7.2/plasma/generic/applets/systemtray/core/manager.cpp:110
#30 0x00007f5419d7abb0 in SystemTray::Applet::checkDefaultApplets (this=0x33340f0) at /usr/src/debug/kdebase-workspace-4.7.2/kdebase-workspace-4.7.2/plasma/generic/applets/systemtray/ui/applet.cpp:737
#31 0x00007f542d281f16 in QObject::event (this=0x33340f0, e=<optimized out>) at kernel/qobject.cpp:1195
#32 0x00007f542ca16a1b in QGraphicsWidget::event (this=0x33340f0, event=0x3319870) at graphicsview/qgraphicswidget.cpp:1461
#33 0x00007f542c3e5994 in notify_helper (e=0x3319870, receiver=0x33340f0, this=0x101fff0) at kernel/qapplication.cpp:4550
#34 QApplicationPrivate::notify_helper (this=0x101fff0, receiver=0x33340f0, e=0x3319870) at kernel/qapplication.cpp:4522
#35 0x00007f542c3ea813 in QApplication::notify (this=0x100c1f0, receiver=0x33340f0, e=0x3319870) at kernel/qapplication.cpp:4411
#36 0x0000003323c50396 in KApplication::notify (this=0x100c1f0, receiver=0x33340f0, event=0x3319870) at /usr/src/debug/kdelibs-4.7.2/kdeui/kernel/kapplication.cpp:311
#37 0x00007f542d26904c in QCoreApplication::notifyInternal (this=0x100c1f0, receiver=0x33340f0, event=0x3319870) at kernel/qcoreapplication.cpp:876
#38 0x00007f542d26cada in sendEvent (event=0x3319870, receiver=0x33340f0) at kernel/qcoreapplication.h:231
#39 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xfbd740) at kernel/qcoreapplication.cpp:1500
#40 0x00007f542d297933 in sendPostedEvents () at kernel/qcoreapplication.h:236
#41 postEventSourceDispatch (s=0x1024890) at kernel/qeventdispatcher_glib.cpp:279
#42 0x00007f542994aacd in g_main_dispatch (context=0x10244e0) at gmain.c:2441
#43 g_main_context_dispatch (context=0x10244e0) at gmain.c:3011
#44 0x00007f542994b2c8 in g_main_context_iterate (context=0x10244e0, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3089
#45 0x00007f542994b49c in g_main_context_iteration (context=0x10244e0, may_block=1) at gmain.c:3152
#46 0x00007f542d297d5f in QEventDispatcherGlib::processEvents (this=0xfbec00, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#47 0x00007f542c48866e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:207
#48 0x00007f542d268182 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#49 0x00007f542d2683d7 in QEventLoop::exec (this=0x7fffe46f5310, flags=...) at kernel/qeventloop.cpp:204
#50 0x00007f542d26cdd5 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#51 0x000000332ee41263 in kdemain (argc=1, argv=0x7fffe46f56f8) at /usr/src/debug/kdebase-workspace-4.7.2/kdebase-workspace-4.7.2/plasma/desktop/shell/main.cpp:120
#52 0x00007f542bc0369d in __libc_start_main (main=0x400870 <main(int, char**)>, argc=1, ubp_av=0x7fffe46f56f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe46f56e8) at libc-start.c:226
#53 0x00000000004008a1 in _start ()

Possible duplicates by query: bug 292781, bug 292431, bug 292119, bug 292013, bug 291859.

Reported using DrKonqi