Crash when painting with filters in histogram code

[Boudewijn Rempt]

Someone testing the klik package informed me that Krita now crashes when 
trying to paint with filters. It indeed does, and the crash occurs somewhere 
in the histogram code:

#4  0xb623bfbc in KisPaintDeviceImpl::exactBounds (this=0x0, x=@0xbfd36c60, 
    y=@0xbfd36c5c, w=@0xbfd36c58, h=@0xbfd36c54)
    at ../../../koffice/krita/core/kis_paint_device_impl.cc:485
#5  0xb62a7275 in KisHistogram::updateHistogram (this=0xbfd370a0)
    at ../../../koffice/krita/core/kis_histogram.cc:62
#6  0xb62a74c3 in KisHistogram (this=0xbfd370a0, paintdev=@0xbfd37150, 
    producer=@0xbfd3714c, type=LINEAR)
    at ../../../koffice/krita/core/kis_histogram.cc:52
#7  0xb5b9a3f6 in KisBrightnessContrastConfigWidget (this=0x894fef8, 
    parent=0x8f00930, dev=@0xbfd37238, name=0x0, f=0)
    
at ../../../../koffice/krita/plugins/colorsfilters/kis_brightness_contrast_filter.cc:144
#8  0xb5b9a806 in KisBrightnessContrastFilter::createConfigurationWidget (
    this=0x83c50e8, parent=0x8f00930, dev=@0xbfd37278)
    
at ../../../../koffice/krita/plugins/colorsfilters/kis_brightness_contrast_filter.cc:54
#9  0xb5506a25 in KisToolFilter::changeFilter (this=0x8f19520, id=@0xbfd372cc)
    at ../../../../koffice/krita/plugins/tool_filter/kis_tool_filter.cc:143
#10 0xb5506e4a in KisToolFilter::createOptionWidget (this=0x8f19520, 
    parent=0x0)
    at ../../../../koffice/krita/plugins/tool_filter/kis_tool_filter.cc:129
#11 0xb62a21eb in KisToolManager::setCurrentTool (this=0x84c84e8, 
    tool=0x8f19520) at ../../../koffice/krita/core/kis_tool_manager.cc:182
#12 0xb62ec8d8 in KisToolPaint::activate (this=0x8f19520)
    at ../../../../koffice/krita/core/tool/kis_tool_paint.cc:190
#13 0xb62ec5cc in KisToolPaint::qt_invoke (this=0x8f19520, _id=3, 
    _o=0xbfd3747c) at kis_tool_paint.moc:92
#14 0xb62ee74d in KisToolFreehand::qt_invoke (this=0x8f19520, _id=3, 
    _o=0xbfd3747c) at kis_tool_freehand.moc:77
#15 0xb5506b1a in KisToolFilter::qt_invoke (this=0x8f19520, _id=3, 
    _o=0xbfd3747c) at kis_tool_filter.moc:87
#16 0xb72ba929 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#17 0xb72bb3c4 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#18 0xb6d28dc9 in KAction::activated () from /usr/lib/libkdeui.so.4
#19 0xb6d5d7ce in KAction::slotActivated () from /usr/lib/libkdeui.so.4
#20 0xb6d5d913 in KToggleAction::slotActivated () from /usr/lib/libkdeui.so.4
#21 0xb6d5d98d in KRadioAction::slotActivated () from /usr/lib/libkdeui.so.4
#22 0xb6d5d9cd in KAction::activate () from /usr/lib/libkdeui.so.4
#23 0xb6037324 in KoToolBox::slotButtonPressed (this=0x8f02150, id=2)
    at ../../../koffice/lib/kopainter/kotoolbox.cc:78
#24 0xb603852f in KoToolBox::qt_invoke (this=0x8f02150, _id=63, _o=0xbfd37638)
    at kotoolbox.moc:106
#25 0xb72ba929 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#26 0xb72bb238 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#27 0xb7621b2b in QButtonGroup::pressed () from /usr/lib/libqt-mt.so.3
#28 0xb7351bd0 in QButtonGroup::buttonPressed () from /usr/lib/libqt-mt.so.3
#29 0xb7621c06 in QButtonGroup::qt_invoke () from /usr/lib/libqt-mt.so.3
#30 0xb72ba929 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#31 0xb72bb3c4 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#32 0xb7622338 in QButton::pressed () from /usr/lib/libqt-mt.so.3
#33 0xb7355095 in QButton::mousePressEvent () from /usr/lib/libqt-mt.so.3
#34 0xb7417bba in QToolButton::mousePressEvent () from /usr/lib/libqt-mt.so.3
#35 0xb72f5317 in QWidget::event () from /usr/lib/libqt-mt.so.3
#36 0xb7251f80 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#37 0xb7252500 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#38 0xb78d5ae7 in KApplication::notify () from /usr/lib/libkdecore.so.4
#39 0xb71e2e25 in QApplication::sendSpontaneousEvent ()
   from /usr/lib/libqt-mt.so.3
#40 0xb71de325 in QETWidget::translateMouseEvent ()
   from /usr/lib/libqt-mt.so.3
#41 0xb71dc66f in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#42 0xb71f5fff in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#43 0xb7269cfb in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#44 0xb7269c1e in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#45 0xb7250c13 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#46 0xb7f1e333 in kdemain (argc=1, argv=0x8133618)
    at ../../koffice/krita/main.cc:40
#47 0xb7f207ad in kdeinitmain (argc=1, argv=0x8133618) at
-- 
Boudewijn Rempt 
http://www.valdyas.org/fading/index.cgi
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