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Bug#482888: /usr/bin/plasma: Panel crashes when redrawing after removing widget

Package: kdebase-workspace-bin
Version: 4:4.0.72-1
Severity: normal
File: /usr/bin/plasma

I am running KDE4 from experimental on top of a Lenny install.

I have added the Wastebin widget to the panel. Having not liked the
place where it was put (to the right of the clock) and having not found
out how to just move it, I decided to actually remove it. All went well
but the redrawing of the tray and the clock. They got one on top of the
other and the place where the wastebin was was now a blank unused space.

When I opened a new window (by selecting to delete some files from
within Dolphin), the panel crashed.

Attached is the backtrace.

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (900, 'testing'), (400, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.24-1-686 (SMP w/1 CPU core)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages kdebase-workspace-bin depends on:
ii  kdebase-runtime             4:4.0.74-1   runtime components from the offici
ii  kdebase-workspace-data      4:4.0.72-1   shared data files for the KDE 4 ba
ii  kdelibs5                    4:4.0.74-1   core libraries for all KDE 4 appli
ii  libc6                       2.7-10       GNU C Library: Shared libraries
ii  libfontconfig1              2.5.0-2      generic font configuration library
ii  libfreetype6                2.3.5-1+b1   FreeType 2 font engine, shared lib
ii  libgcc1                     1:4.3.0-5    GCC support library
ii  libgl1-mesa-glx [libgl1]    7.0.3-1      A free implementation of the OpenG
ii  libglib2.0-0                2.16.3-2     The GLib library of C routines
ii  libice6                     2:1.0.4-1    X11 Inter-Client Exchange library
ii  libnm-util0                 0.6.6-1      network management framework (shar
ii  libpam0g             Pluggable Authentication Modules l
ii  libphonon4                  4:4.0.74-1   Phonon multimedia framework for Qt
ii  libplasma1                  4:4.0.72-1   library for the KDE 4 Plasma deskt
ii  libpng12-0                  1.2.27-1     PNG library - runtime
ii  libqimageblitz4             1:0.0.4-1+b1 KDE/Qt image filter library
ii  libqt4-dbus                 4.4.0-2      Qt 4 D-Bus module
ii  libqt4-gui                  4.4.0-2      transitional package for Qt 4 GUI 
ii  libqt4-network              4.4.0-2      Qt 4 network module
ii  libqt4-qt3support           4.4.0-2      Qt 3 compatibility library for Qt 
ii  libqt4-script               4.4.0-2      Qt 4 script module
ii  libqt4-svg                  4.4.0-2      Qt 4 SVG module
ii  libqt4-xml                  4.4.0-2      Qt 4 XML module
ii  libqtcore4                  4.4.0-2      Qt 4 core module
ii  libsm6                      2:1.0.3-1+b1 X11 Session Management library
ii  libstdc++6                  4.3.0-5      The GNU Standard C++ Library v3
ii  libstreamanalyzer0          0.5.9-1      streamanalyzer library for Strigi 
ii  libusb-0.1-4                2:0.1.12-11  userspace USB programming library
ii  libx11-6                    2:1.1.4-1    X11 client-side library
ii  libxau6                     1:1.0.3-2    X11 authorisation library
ii  libxcomposite1              1:0.4.0-1    X11 Composite extension library
ii  libxext6                    2:1.0.4-1    X11 miscellaneous extension librar
ii  libxfixes3                  1:4.0.3-2    X11 miscellaneous 'fixes' extensio
ii  libxft2                     2.1.12-2     FreeType-based font drawing librar
ii  libxklavier12               3.5-1        X Keyboard Extension high-level AP
ii  libxrandr2                  2:1.2.2-1    X11 RandR extension library
ii  libxrender1                 1:0.9.4-1    X Rendering Extension client libra
ii  libxtst6                    2:1.0.3-1    X11 Testing -- Resource extension 
ii  libxxf86misc1               1:1.0.1-3    X11 XFree86 miscellaneous extensio
ii  x11-utils                   7.3+1        X11 utilities
ii  x11-xserver-utils           7.3+2        X server utilities

kdebase-workspace-bin recommends no packages.

-- no debconf information
Application: Plasma Workspace (plasma), signal SIGSEGV
Using host libthread_db library "/lib/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb5599720 (LWP 5405)]
[New Thread 0xb2198b90 (LWP 29892)]
[New Thread 0xb3857b90 (LWP 5414)]
[KCrash handler]
#6  0xb714da7c in QGraphicsLayoutItem::sizePolicy (this=0x888ee10)
    at graphicsview/qgraphicslayoutitem.cpp:332
#7  0xb7157e77 in QGridLayoutItem::sizePolicy (this=0x8172590, 
    orientation=Qt::Horizontal) at graphicsview/qgridlayoutengine.cpp:531
#8  0xb715831f in QGridLayoutItem::stretchFactor (this=0x6f0072, 
    orientation=Qt::Horizontal) at graphicsview/qgridlayoutengine.cpp:512
#9  0xb715a58c in QGridLayoutEngine::fillRowData (this=0x819cb24, 
    rowData=0x819cb88, styleInfo=@0xbfe2c84c, orientation=Qt::Horizontal)
    at graphicsview/qgridlayoutengine.cpp:1265
#10 0xb715b7df in QGridLayoutEngine::ensureColumnAndRowData (this=0x819cb24, 
    styleInfo=@0xbfe2c84c) at graphicsview/qgridlayoutengine.cpp:1417
#11 0xb715b966 in QGridLayoutEngine::ensureGeometries (this=0x819cb24, 
    styleInfo=@0xbfe2c84c, size=@0xbfe2c7e0)
    at graphicsview/qgridlayoutengine.cpp:1432
#12 0xb715beac in QGridLayoutEngine::setGeometries (this=0x819cb24, 
    styleInfo=@0xbfe2c84c, contentsGeometry=@0xbfe2c828)
    at graphicsview/qgridlayoutengine.cpp:961
#13 0xb714eacf in QGraphicsLinearLayout::setGeometry (this=0x8134268, 
    rect=@0xbfe2c8a8) at graphicsview/qgraphicslinearlayout.cpp:489
#14 0xb714cec8 in QGraphicsLayout::activate (this=0x8134268)
    at graphicsview/qgraphicslayout.cpp:252
#15 0xb714cf66 in QGraphicsLayout::widgetEvent (this=0x8134268, e=0x881c568)
    at graphicsview/qgraphicslayout.cpp:315
#16 0xb71522e3 in QGraphicsWidget::event (this=0x811bd70, event=0x881c568)
    at graphicsview/qgraphicswidget.cpp:1153
#17 0xb6ba5bac in QApplicationPrivate::notify_helper (this=0x8073b50, 
    receiver=0x811bd70, e=0x881c568) at kernel/qapplication.cpp:3772
#18 0xb6baa739 in QApplication::notify (this=0x8077830, receiver=0x811bd70, 
    e=0x881c568) at kernel/qapplication.cpp:3366
#19 0xb7ac87ed in KApplication::notify (this=0x8077830, receiver=0x811bd70, 
    at /tmp/buildd/kde4libs-4.0.74/kdeui/kernel/kapplication.cpp:311
#20 0xb7498899 in QCoreApplication::notifyInternal (this=0x8077830, 
    receiver=0x811bd70, event=0x881c568) at kernel/qcoreapplication.cpp:587
#21 0xb7499c49 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, 
    event_type=0, data=0x804b430)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 0xb7499e6d in QCoreApplication::sendPostedEvents (receiver=0x0, 
    event_type=0) at kernel/qcoreapplication.cpp:1091
#23 0xb74c3caf in postEventSourceDispatch (s=0x8078920)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#24 0xb59e3978 in IA__g_main_context_dispatch (context=0x8078898)
    at /build/buildd/glib2.0-2.16.3/glib/gmain.c:2009
#25 0xb59e6bce in g_main_context_iterate (context=0x8078898, block=1, 
    dispatch=1, self=0x80756e0)
    at /build/buildd/glib2.0-2.16.3/glib/gmain.c:2642
#26 0xb59e711c in IA__g_main_context_iteration (context=0x8078898, 
    may_block=1) at /build/buildd/glib2.0-2.16.3/glib/gmain.c:2705
#27 0xb74c4078 in QEventDispatcherGlib::processEvents (this=0x8070e58, 
    flags=@0xbfe2ce98) at kernel/qeventdispatcher_glib.cpp:325
#28 0xb6c37df5 in QGuiEventDispatcherGlib::processEvents (this=0x8070e58, 
    flags=@0xbfe2cec8) at kernel/qguieventdispatcher_glib.cpp:204
#29 0xb7497b1d in QEventLoop::processEvents (this=0xbfe2cf40, 
    flags=@0xbfe2cf04) at kernel/qeventloop.cpp:149
#30 0xb7497cad in QEventLoop::exec (this=0xbfe2cf40, flags=@0xbfe2cf48)
    at kernel/qeventloop.cpp:200
#31 0xb7499f2d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:845
#32 0xb6ba5507 in QApplication::exec () at kernel/qapplication.cpp:3304
#33 0xb7f0fc06 in kdemain (argc=1, argv=0xbfe2d114)
    at /tmp/buildd/kdebase-workspace-4.0.72/plasma/plasma/main.cpp:54
#34 0x08048562 in main (argc=)
    at /tmp/buildd/kdebase-workspace-4.0.72/obj-i486-linux-gnu/plasma/plasma/plasma-qgv_dummy.cpp:3
#35 0xb7dcc450 in __libc_start_main () from /lib/i686/cmov/libc.so.6
#36 0x080484d1 in _start ()
#0  0xffffe410 in __kernel_vsyscall ()

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