Fix crash when starting Krita with Qt compiled in debug mode.
This is the backtrace:
0 0x00007ffff38a11cc in KoColorSet::getGroup(QString const&) () from /usr/lib64/libkritapigment.so.18
1 0x00007ffff3d2aa69 in KisPaletteModel::index(int, int, QModelIndex const&) const () from /usr/lib64/libkritawidgets.so.18
2 0x00007ffff5812796 in QAbstractItemView::setModel(QAbstractItemModel*) () from /usr/lib64/libQt5Widgets.so.5
3 0x00007ffff582e749 in QHeaderView::setModel(QAbstractItemModel*) () from /usr/lib64/libQt5Widgets.so.5
4 0x00007ffff5871493 in QTableView::setModel(QAbstractItemModel*) () from /usr/lib64/libQt5Widgets.so.5
5 0x00007ffff3d31e17 in KisPaletteView::setPaletteModel(KisPaletteModel*) () from /usr/lib64/libkritawidgets.so.18
6 0x00007ffff3d2691e in KisDlgInternalColorSelector::KisDlgInternalColorSelector(QWidget*, KoColor, KisDlgInternalColorSelector::Config, QString const&, KoColorDisplayRendererInterface const*) () from /usr/lib64/libkritawidgets.so.18
7 0x00007ffff7000d67 in KoDualColorButton::Private::init(KoDualColorButton*) () from /usr/lib64/libkritaui.so.18
8 0x00007ffff7002c5b in KoDualColorButton::KoDualColorButton(KoColor const&, KoColor const&, KoColorDisplayRendererInterface const*, QWidget*, QWidget*) ()
from /usr/lib64/libkritaui.so.18 9 0x00007ffff6e2b5b5 in KisControlFrame::setup(QWidget*) () from /usr/lib64/libkritaui.so.18
10 0x00007ffff71014ea in KisViewManager::KisViewManager(QWidget*, KActionCollection*) () from /usr/lib64/libkritaui.so.18
11 0x00007ffff70cb72b in KisMainWindow::KisMainWindow(QUuid) () from /usr/lib64/libkritaui.so.18
12 0x00007ffff70d8352 in KisPart::createMainWindow(QUuid) () from /usr/lib64/libkritaui.so.18
13 0x00007ffff70d85de in KisPart::startBlankSession() () from /usr/lib64/libkritaui.so.18
14 0x00007ffff70995b9 in KisApplication::start(KisApplicationArguments const&) () from /usr/lib64/libkritaui.so.18
15 0x0000555555e4e229 in main ()
The KisPaletteModel::index() call is inside an Q_ASSERT_X in QAbstractItemView::setModel(), so you have to compile Qt in debug mode to reproduce this crash.
m_rowGroupNameMap is empty during the startup.