[Bug 202136] New: taskbar crashes when using firefox or loading new webpage

https://bugs.kde.org/show_bug.cgi?id=202136

           Summary: taskbar crashes when using firefox or loading new
                    webpage
           Product: plasma
           Version: unspecified
          Platform: Unlisted Binaries
        OS/Version: Linux
            Status: NEW
          Severity: crash
          Priority: NOR
         Component: general
        AssignedTo: plasma-bugs@xxxxxxx
        ReportedBy: shawn.starr@xxxxxxxxxx


Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.62 (KDE 4.3.62 (KDE 4.4 >= 20090728))
Qt Version: 4.5.2
Operating System: Linux 2.6.29.6-213.fc11.x86_64 x86_64
Distribution: "Fedora release 11 (Leonidas)"

What I was doing when the application crashed:
1) have firefox loaded
2) Sometimes when loading new webpages, while firefox is maximized
plasma-desktop will crash.

I can reproduce this periodically, seems to be another regression in taskbar
code :(

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f90f8691c68 in QWidget::testAttribute (this=0x26b3120,
attribute=Qt::WA_WState_Visible) at /usr/include/QtGui/qwidget.h:996
#6  0x00007f90f8691c23 in QWidget::isVisible (this=0x26b3120) at
/usr/include/QtGui/qwidget.h:958
#7  0x00007f90f869091d in WindowTaskItem::updateToolTip (this=0x28adb40) at
/root/kdebase/workspace/plasma/applets/tasks/windowtaskitem.cpp:198
#8  0x00007f90f869c330 in AbstractTaskItem::toolTipAboutToShow (this=0x28adb40)
at /root/kdebase/workspace/plasma/applets/tasks/abstracttaskitem.cpp:246
#9  0x00007f90f86a1115 in AbstractTaskItem::qt_metacall (this=0x28adb40,
_c=QMetaObject::InvokeMetaMethod, _id=2, _a=0x7fffa6de9da0)
    at /root/kdebase-dev/workspace/plasma/applets/tasks/abstracttaskitem.moc:85
#10 0x00007f90f86917c3 in WindowTaskItem::qt_metacall (this=0x28adb40,
_c=QMetaObject::InvokeMetaMethod, _id=7, _a=0x7fffa6de9da0)
    at /root/kdebase-dev/workspace/plasma/applets/tasks/windowtaskitem.moc:66
#11 0x00000032af548077 in QMetaMethod::invoke (this=0x7fffa6dea050,
object=0x28adb40, connectionType=<value optimized out>, returnValue=
        {<QGenericArgument> = {_data = 0x0, _name = 0x0}, <No data fields>},
val0={_data = 0x0, _name = 0x0}, val1={_data = 0x0, _name = 0x0}, val2={_data =
0x0, _name = 0x0}, val3=
      {_data = 0x0, _name = 0x0}, val4={_data = 0x0, _name = 0x0}, val5={_data
= 0x0, _name = 0x0}, val6={_data = 0x0, _name = 0x0}, val7={_data = 0x0, _name
= 0x0}, val8={_data = 0x0, _name = 0x0}, 
    val9={_data = 0x0, _name = 0x0}) at kernel/qmetaobject.cpp:1522
#12 0x00000032af548716 in QMetaObject::invokeMethod (obj=0x28adb40,
member=<value optimized out>, type=<value optimized out>,
ret={<QGenericArgument> = {_data = 0x0, _name = 0x0}, <No data fields>}, 
    val0={_data = 0x0, _name = 0x0}, val1={_data = 0x0, _name = 0x0},
val2={_data = 0x0, _name = 0x0}, val3={_data = 0x0, _name = 0x0}, val4={_data =
0x0, _name = 0x0}, val5=
      {_data = 0x0, _name = 0x0}, val6={_data = 0x0, _name = 0x0}, val7={_data
= 0x0, _name = 0x0}, val8={_data = 0x0, _name = 0x0}, val9={_data = 0x0, _name
= 0x0}) at kernel/qmetaobject.cpp:1114
#13 0x00007f91110dfcb7 in QMetaObject::invokeMethod (obj=0x28adb40,
member=0x7f9111247591 "toolTipAboutToShow", val0={_data = 0x0, _name = 0x0},
val1={_data = 0x0, _name = 0x0}, val2=
      {_data = 0x0, _name = 0x0}, val3={_data = 0x0, _name = 0x0}, val4={_data
= 0x0, _name = 0x0}, val5={_data = 0x0, _name = 0x0}, val6={_data = 0x0, _name
= 0x0}, val7={_data = 0x0, _name = 0x0}, 
    val8={_data = 0x0, _name = 0x0}, val9={_data = 0x0, _name = 0x0}) at
/usr/include/QtCore/qobjectdefs.h:403
#14 0x00007f911118f86b in Plasma::ToolTipManagerPrivate::showToolTip
(this=0x1f0be70) at /root/kdelibs/plasma/tooltipmanager.cpp:350
#15 0x00007f911118ff76 in Plasma::ToolTipManager::qt_metacall (this=0x1ee36e0,
_c=QMetaObject::InvokeMetaMethod, _id=2, _a=0x7fffa6dea680) at
/root/kdelibs-dev/plasma/tooltipmanager.moc:82
#16 0x00000032af554fdc in QMetaObject::activate (sender=0x1fbfc00,
from_signal_index=<value optimized out>, to_signal_index=<value optimized out>,
argv=0x7fffa6de9da0) at kernel/qobject.cpp:3113
#17 0x00000032af54ef93 in QObject::event (this=0x1fbfc00, e=0xf) at
kernel/qobject.cpp:1075
#18 0x000000354f38ee2c in QApplicationPrivate::notify_helper (this=0x1c941d0,
receiver=0x1fbfc00, e=0x7fffa6deacb0) at kernel/qapplication.cpp:4056
#19 0x000000354f395e5e in QApplication::notify (this=0x1c80400,
receiver=0x1fbfc00, e=0x7fffa6deacb0) at kernel/qapplication.cpp:4021
#20 0x00007f911012314f in KApplication::notify (this=0x1c80400,
receiver=0x1fbfc00, event=0x7fffa6deacb0) at
/root/kdelibs/kdeui/kernel/kapplication.cpp:302
#21 0x00000032af53fcbc in QCoreApplication::notifyInternal (this=0x1c80400,
receiver=0x1fbfc00, event=0x7fffa6deacb0) at kernel/qcoreapplication.cpp:610
#22 0x00000032af56aa72 in QCoreApplication::sendEvent (event=<value optimized
out>, receiver=<value optimized out>) at kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (event=<value optimized out>,
receiver=<value optimized out>) at kernel/qeventdispatcher_unix.cpp:572
#24 0x00000032af56846d in timerSourceDispatch (source=<value optimized out>) at
kernel/qeventdispatcher_glib.cpp:165
#25 0x00000032ab837abe in g_main_context_dispatch () from
/lib64/libglib-2.0.so.0
#26 0x00000032ab83b278 in ?? () from /lib64/libglib-2.0.so.0
#27 0x00000032ab83b3a0 in g_main_context_iteration () from
/lib64/libglib-2.0.so.0
#28 0x00000032af5683b6 in QEventDispatcherGlib::processEvents (this=0x1c67a10,
flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#29 0x000000354f421b6e in QGuiEventDispatcherGlib::processEvents
(this=0x26b3120, flags=<value optimized out>) at
kernel/qguieventdispatcher_glib.cpp:202
#30 0x00000032af53e5f2 in QEventLoop::processEvents (this=<value optimized
out>, flags={i = 36}) at kernel/qeventloop.cpp:149
#31 0x00000032af53e9c4 in QEventLoop::exec (this=0x7fffa6deaf50, flags={i = 0})
at kernel/qeventloop.cpp:201
#32 0x00000032af540b79 in QCoreApplication::exec () at
kernel/qcoreapplication.cpp:888
#33 0x00007f911171d767 in kdemain (argc=1, argv=0x7fffa6deb328) at
/root/kdebase/workspace/plasma/shells/desktop/main.cpp:112
#34 0x00000000004008ae in main (argc=1, argv=0x7fffa6deb328) at
/root/kdebase-dev/workspace/plasma/shells/desktop/plasma-desktop_dummy.cpp:3
Warning: the current language does not match this frame.

Reported using DrKonqi

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