https://bugs.kde.org/show_bug.cgi?id=430613
            Bug ID: 430613
           Summary: Appearance Section Causes Crash
           Product: systemsettings
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: plasma-b...@kde.org
          Reporter: margolis.marm...@gmail.com
  Target Milestone: ---

SUMMARY
any option within "Appearance" section in system settings causes a crash

STEPS TO REPRODUCE
1. open system settings
2. select any option in Appearance
3.

OBSERVED RESULT
Crash

Application: systemsettings5 (5.19.5)

Qt Version: 5.14.2
Frameworks Version: 5.74.0
Operating System: Linux 5.8.0-33-generic x86_64
Windowing system: X11
Distribution: Ubuntu 20.10

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault

[KCrash Handler]
#4  0x00007f69cb7b2d74 in QWidget::style() const () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#5  0x00007f69c45a5479 in dstyle::Style::drawComboBoxLabelControl(QStyleOption
const*, QPainter*, QWidget const*) const () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/styles/libdstyleplugin.so
#6  0x00007f69c4593586 in dstyle::Style::drawControl(QStyle::ControlElement,
QStyleOption const*, QPainter*, QWidget const*) const () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/styles/libdstyleplugin.so
#7  0x00007f69b42718ca in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/qqc2desktopstyle/private/libqqc2desktopstyleplugin.so
#8  0x00007f69b4271eb7 in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/qqc2desktopstyle/private/libqqc2desktopstyleplugin.so
#9  0x00007f69ca0b7ceb in QQuickWindowPrivate::polishItems() () from
/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f69ca171102 in QQuickRenderControl::polishItems() () from
/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f69ca3ce869 in ?? () from
/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#12 0x00007f69cb7ccd64 in QWidget::event(QEvent*) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f69cb78b013 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007f69cac491ca in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f69cb7c455e in QWidgetPrivate::sendPendingMoveAndResizeEvents(bool,
bool) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f69cb7c8cb7 in QWidgetPrivate::show_helper() () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007f69cb7cbe73 in QWidgetPrivate::setVisible(bool) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f69cb7c8c41 in QWidgetPrivate::showChildren(bool) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007f69cb7c8cd3 in QWidgetPrivate::show_helper() () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007f69cb7cbe73 in QWidgetPrivate::setVisible(bool) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007f69cb7c8c41 in QWidgetPrivate::showChildren(bool) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007f69cb7c8cd3 in QWidgetPrivate::show_helper() () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f69cb7c8c59 in QWidgetPrivate::showChildren(bool) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f69cb7c8cd3 in QWidgetPrivate::show_helper() () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007f69cb7cbe73 in QWidgetPrivate::setVisible(bool) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007f69cb7c8c41 in QWidgetPrivate::showChildren(bool) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f69cb7c8cd3 in QWidgetPrivate::show_helper() () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007f69cb7cbe73 in QWidgetPrivate::setVisible(bool) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007f69cb7b0f17 in QStackedLayout::setCurrentIndex(int) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007f69cbfe9c59 in ?? () from
/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#31 0x00007f69cac7f320 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#32 0x00007f69cabf3354 in QItemSelectionModel::selectionChanged(QItemSelection
const&, QItemSelection const&) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007f69cabfc146 in QItemSelectionModel::select(QItemSelection const&,
QFlags<QItemSelectionModel::SelectionFlag>) () from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007f69cabf6cab in QItemSelectionModel::setCurrentIndex(QModelIndex
const&, QFlags<QItemSelectionModel::SelectionFlag>) () from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f69cbfe7ff7 in ?? () from
/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#36 0x00007f69cbfe9adc in ?? () from
/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#37 0x00007f69cac7f320 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f69cabe2e0a in
QAbstractItemModel::layoutChanged(QList<QPersistentModelIndex> const&,
QAbstractItemModel::LayoutChangeHint) () from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007f69cbff04b0 in KPageWidgetModel::addPage(KPageWidgetItem*) () from
/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#40 0x00007f69cc2d1270 in ModuleView::loadModule(QModelIndex const&,
QStringList const&) () from /lib/x86_64-linux-gnu/libsystemsettingsview.so.3
#41 0x00007f69bc4674fe in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/systemsettings_sidebar_mode.so
#42 0x00007f69bc46588d in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/systemsettings_sidebar_mode.so
#43 0x00007f69bc465db3 in ?? () from
/usr/lib/x86_64-linux-gnu/qt5/plugins/systemsettings_sidebar_mode.so
#44 0x00007f69c9cadbd5 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#45 0x00007f69c9ba44aa in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#46 0x00007f69c9ba62b2 in QV4::QObjectMethod::callInternal(QV4::Value const*,
QV4::Value const*, int) const () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#47 0x00007f69c9bc158b in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#48 0x00007f69c9bc40b7 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#49 0x00007f69c9b6108d in QV4::Function::call(QV4::Value const*, QV4::Value
const*, int, QV4::ExecutionContext const*) () from
/lib/x86_64-linux-gnu/libQt5Qml.so.5
#50 0x00007f69c9cc7a15 in QQmlJavaScriptExpression::evaluate(QV4::CallData*,
bool*) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#51 0x00007f69c9c7f07b in QQmlBoundSignalExpression::evaluate(void**) () from
/lib/x86_64-linux-gnu/libQt5Qml.so.5
#52 0x00007f69c9c7f558 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#53 0x00007f69c9cad67d in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*,
void**) () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#54 0x00007f69cac7ee75 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x00007f69c48c3531 in QQuickAbstractButtonPrivate::handleRelease(QPointF
const&) () from /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#56 0x00007f69c48e19a9 in QQuickControl::mouseReleaseEvent(QMouseEvent*) ()
from /lib/x86_64-linux-gnu/libQt5QuickTemplates2.so.5
#57 0x00007f69ca0a5388 in QQuickItem::event(QEvent*) () from
/lib/x86_64-linux-gnu/libQt5Quick.so.5
#58 0x00007f69cb78b013 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#59 0x00007f69cac491ca in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /lib/x86_64-linux-gnu/libQt5Core.so.5
#60 0x00007f69ca0bfc34 in
QQuickWindowPrivate::deliverMouseEvent(QQuickPointerMouseEvent*) () from
/lib/x86_64-linux-gnu/libQt5Quick.so.5
#61 0x00007f69ca0c0f6b in
QQuickWindowPrivate::deliverPointerEvent(QQuickPointerEvent*) () from
/lib/x86_64-linux-gnu/libQt5Quick.so.5
#62 0x00007f69cb0b07c5 in QWindow::event(QEvent*) () from
/lib/x86_64-linux-gnu/libQt5Gui.so.5
#63 0x00007f69cb78b013 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#64 0x00007f69cac491ca in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /lib/x86_64-linux-gnu/libQt5Core.so.5
#65 0x00007f69ca3d29fb in QQuickWidget::mouseReleaseEvent(QMouseEvent*) () from
/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#66 0x00007f69cb7cc30e in QWidget::event(QEvent*) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#67 0x00007f69cb78b013 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#68 0x00007f69cb790841 in QApplication::notify(QObject*, QEvent*) () from
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#69 0x00007f69cac491ca in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /lib/x86_64-linux-gnu/libQt5Core.so.5
#70 0x00007f69cb78f73a in QApplicationPrivate::sendMouseEvent(QWidget*,
QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) ()
from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#71 0x00007f69cb7e4f32 in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#72 0x00007f69cb7e7d8e in ?? () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#73 0x00007f69cb78b013 in QApplicationPrivate::notify_helper(QObject*, QEvent*)
() from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#74 0x00007f69cac491ca in QCoreApplication::notifyInternal2(QObject*, QEvent*)
() from /lib/x86_64-linux-gnu/libQt5Core.so.5
#75 0x00007f69cb0a448b in
QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*)
() from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#76 0x00007f69cb07a2bb in
QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#77 0x00007f69c5c5e35e in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#78 0x00007f69c89934db in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#79 0x00007f69c8993788 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#80 0x00007f69c8993853 in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#81 0x00007f69caca0843 in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /lib/x86_64-linux-gnu/libQt5Core.so.5
#82 0x00007f69cac47a4b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#83 0x00007f69cac4ffc6 in QCoreApplication::exec() () from
/lib/x86_64-linux-gnu/libQt5Core.so.5
#84 0x000055a0bc0e70bf in ?? ()
#85 0x00007f69ca5fbcb2 in __libc_start_main (main=0x55a0bc0e69c0, argc=1,
argv=0x7ffcbe466cb8, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffcbe466ca8) at ../csu/libc-start.c:314
#86 0x000055a0bc0e7d2e in _start ()
[Inferior 1 (process 5937) detached]

Report to https://bugs.kde.org/

EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION

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