Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.3 (KDE 4.3.3)
Qt Version: 4.5.3
Operating System: Linux 2.6.31-ARCH x86_64

What I was doing when the application crashed:
added plasma widget, system monitor.
Adding multiple applets on the popup works fine.
Removing them causes a plasma crash.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fdaac2e8760 (LWP 1669))]

Thread 2 (Thread 0x7fda8d1dc710 (LWP 1672)):
#0  0x00007fdaababb07c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fdaabd2b3ab in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007fdaa819165c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007fdaabd2a2e5 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007fdaabab681a in start_thread () from /lib/libpthread.so.0
#5  0x00007fdaa946f8cd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fdaac2e8760 (LWP 1669)):
[KCrash Handler]
#5  0x00007fdaa32974b0 in Plasma::Containment::containmentType() const () from /usr/lib/libplasma.so.3
#6  0x00007fdaa328a193 in Plasma::Applet::destroy() () from /usr/lib/libplasma.so.3
#7  0x00007fda866be6a4 in SystemMonitor::removeApplet(QString const&) () from /usr/lib/kde4/plasma_applet_system-monitor.so
#8  0x00007fda866befb8 in SystemMonitor::toggled(bool) () from /usr/lib/kde4/plasma_applet_system-monitor.so
#9  0x00007fda866bf0ec in SystemMonitor::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_system-monitor.so
#10 0x00007fdaabe2447c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0x00007fdaa3324812 in Plasma::PushButton::toggled(bool) () from /usr/lib/libplasma.so.3
#12 0x00007fdaa3325b28 in Plasma::PushButton::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libplasma.so.3
#13 0x00007fda866c0d35 in MonitorButton::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_system-monitor.so
#14 0x00007fdaabe2447c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#15 0x00007fdaaa1a6792 in QAbstractButton::toggled(bool) () from /usr/lib/libQtGui.so.4
#16 0x00007fdaa9f0a308 in QAbstractButton::setChecked(bool) () from /usr/lib/libQtGui.so.4
#17 0x00007fdaa9f09fca in ?? () from /usr/lib/libQtGui.so.4
#18 0x00007fdaa9f0a255 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#19 0x00007fdaa9bf6060 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x00007fdaa9ba760c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x00007fdaa9bae721 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x00007fdaaa7db926 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#23 0x00007fdaabe0f33c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#24 0x00007fdaa9badff0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#25 0x00007fdaaa18a4a8 in ?? () from /usr/lib/libQtGui.so.4
#26 0x00007fdaaa12b319 in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#27 0x00007fdaaa150b49 in ?? () from /usr/lib/libQtGui.so.4
#28 0x00007fdaaa159045 in QGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libQtGui.so.4
#29 0x00007fdaaa15ac0f in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#30 0x00007fdaa9ba760c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#31 0x00007fdaa9bae8de in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#32 0x00007fdaaa7db926 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#33 0x00007fdaabe0f33c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#34 0x00007fdaaa16ce41 in QGraphicsView::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#35 0x00007fdaa9bf6060 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#36 0x00007fdaa9f4f2b6 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#37 0x00007fdaaa16c8bb in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#38 0x00007fdaabe0e687 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#39 0x00007fdaa9ba75dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#40 0x00007fdaa9bae721 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#41 0x00007fdaaa7db926 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#42 0x00007fdaabe0f33c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#43 0x00007fdaa9badff0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#44 0x00007fdaa9c13f94 in ?? () from /usr/lib/libQtGui.so.4
#45 0x00007fdaa9c12c6a in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#46 0x00007fdaa9c3aefc in ?? () from /usr/lib/libQtGui.so.4
#47 0x00007fdaa8af61fe in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#48 0x00007fdaa8af9bb8 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#49 0x00007fdaa8af9ce0 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#50 0x00007fdaabe37863 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#51 0x00007fdaa9c3a6de in ?? () from /usr/lib/libQtGui.so.4
#52 0x00007fdaabe0dc72 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#53 0x00007fdaabe0e044 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#54 0x00007fdaabe101f9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#55 0x00007fda9fa4184f in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#56 0x0000000000406eae in _start ()

This bug may be a duplicate of or related to bug 210828

Reported using DrKonqi