Bug 497656

Happens every time.

OBSERVED RESULT
```
Thread 1 "marble-qt" received signal SIGSEGV, Segmentation fault.
0x00007ffff6738f12 in QPixmap::isNull() const () from /usr/lib64/libQt6Gui.so.6
(gdb) bt
#0  0x00007ffff6738f12 in QPixmap::isNull() const () at /usr/lib64/libQt6Gui.so.6
#1  0x00007ffff6738fff in QPixmap::copy(QRect const&) const () at /usr/lib64/libQt6Gui.so.6
#2  0x00007ffff6739131 in QPixmap::QPixmap(QPixmap const&) () at /usr/lib64/libQt6Gui.so.6
#3  0x00007ffff7b57879 in Marble::RouteRequest::pixmap (this=0x555555872708, position=position@entry=0, size=size@entry=-1, margin=margin@entry=2)
    at /var/tmp/portage/kde-apps/marble-24.12.0-r1/work/marble-24.12.0/src/lib/marble/routing/RouteRequest.cpp:197
#4  0x00007ffff7b65ecd in Marble::RoutingLayerPrivate::renderRequest (this=0x555555a3d0d0, painter=painter@entry=0x7fffffffc8d0)
    at /var/tmp/portage/kde-apps/marble-24.12.0-r1/work/marble-24.12.0/src/lib/marble/routing/RoutingLayer.cpp:387
#5  0x00007ffff7b623de in Marble::RoutingLayer::render (this=0x555555b71cf0, painter=0x7fffffffc8d0, viewport=<optimized out>, renderPos=<optimized out>, layer=<optimized out>)
    at /var/tmp/portage/kde-apps/marble-24.12.0-r1/work/marble-24.12.0/src/lib/marble/routing/RoutingLayer.cpp:680
#6  0x00007ffff7ad0e28 in Marble::LayerManager::renderLayers (this=0x555555886840, painter=painter@entry=0x7fffffffc8d0, viewport=0x555555886810)
    at /var/tmp/portage/kde-apps/marble-24.12.0-r1/work/marble-24.12.0/src/lib/marble/LayerManager.cpp:161
#7  0x00007ffff7a4dea1 in Marble::MarbleMap::paint (this=0x555555860c20, painter=..., dirtyRect=...) at /var/tmp/portage/kde-apps/marble-24.12.0-r1/work/marble-24.12.0/src/lib/marble/MarbleMap.cpp:831
#8  0x00007ffff7a3f304 in Marble::MarbleWidget::paintEvent (this=0x5555558613e0, evt=0x7fffffffcb00) at /var/tmp/portage/kde-apps/marble-24.12.0-r1/work/marble-24.12.0/src/lib/marble/MarbleWidget.cpp:708
#9  0x00007ffff7347405 in QWidget::event(QEvent*) () at /usr/lib64/libQt6Widgets.so.6
#10 0x00007ffff7337875 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt6Widgets.so.6
#11 0x00007ffff630a120 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt6Core.so.6
#12 0x00007ffff73152f9 in QWidgetPrivate::sendPaintEvent(QRegion const&) () at /usr/lib64/libQt6Widgets.so.6
#13 0x00007ffff731c459 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, QFlags<QWidgetPrivate::DrawWidgetFlag>, QPainter*, QWidgetRepaintManager*) () at /usr/lib64/libQt6Widgets.so.6
#14 0x00007ffff731e1d7 in QWidgetRepaintManager::paintAndFlush() () at /usr/lib64/libQt6Widgets.so.6
#15 0x00007ffff7346c5c in QWidget::event(QEvent*) () at /usr/lib64/libQt6Widgets.so.6
#16 0x00007ffff7337875 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt6Widgets.so.6
#17 0x00007ffff630a120 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt6Core.so.6
#18 0x00007ffff632ed26 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt6Core.so.6
#19 0x00007ffff60c2a57 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /usr/lib64/libQt6Core.so.6
#20 0x00007fffea9bfadc in g_main_dispatch () at /usr/lib64/libglib-2.0.so.0
#21 0x00007fffea9c2da7 in g_main_context_iterate_unlocked.isra () at /usr/lib64/libglib-2.0.so.0
#22 0x00007fffea9c3510 in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#23 0x00007ffff60c0d60 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Core.so.6
#24 0x00007ffff633388b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt6Core.so.6
#25 0x00007ffff6333a36 in QCoreApplication::exec() () at /usr/lib64/libQt6Core.so.6
#26 0x000055555556e659 in main (argc=<optimized out>, argv=<optimized out>) at /var/tmp/portage/kde-apps/marble-24.12.0-r1/work/marble-24.12.0/src/apps/marble-qt/qtmain.cpp:267
```

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 24.12
KDE Plasma Version: N/A
KDE Frameworks Version: N/A
Qt Version: 6.7.3