Commit 0531e444a78330eb9ce22afcf9b4d2e4a8b66105 causes dolphin to crash on startup

Thread 1 "dolphin" received signal SIGSEGV, Segmentation fault.
QTimer::stop (this=0x0) at /usr/src/debug/qt6-qtbase-6.7.0-0.rc1.1.x86_64/src/corelib/kernel/qtimer.cpp:237
237         Q_D(QTimer);
(gdb) bt
#0  QTimer::stop (this=0x0) at /usr/src/debug/qt6-qtbase-6.7.0-0.rc1.1.x86_64/src/corelib/kernel/qtimer.cpp:237
#1  0x00007ffff692edbd in QWidget::event (this=0x0, event=0x7fffffffcf60)
    at /usr/src/debug/qt6-qtbase-6.7.0-0.rc1.1.x86_64/src/widgets/kernel/qwidget.cpp:9223
#2  0x00007ffff68e00a2 in QApplicationPrivate::notify_helper (this=0x5555556a8100, receiver=0x555555f17b50, 
    e=0x7fffffffcf60) at /usr/src/debug/qt6-qtbase-6.7.0-0.rc1.1.x86_64/src/widgets/kernel/qapplication.cpp:3298
#3  0x00007ffff68ddece in QApplication::notify (this=0x7fffffffd598, receiver=0x555555f17b50, e=0x7fffffffcf60)
    at /usr/src/debug/qt6-qtbase-6.7.0-0.rc1.1.x86_64/src/widgets/kernel/qapplication.cpp:2691
#4  0x00007ffff5736cbf in QCoreApplication::notifyInternal2 (receiver=0x555555f17b50, event=0x7fffffffcf60)
    at /usr/src/debug/qt6-qtbase-6.7.0-0.rc1.1.x86_64/src/corelib/kernel/qcoreapplication.cpp:1134
#5  0x00007ffff6927fd5 in QWidgetPrivate::hide_helper (this=0x555555e45730)
    at /usr/src/debug/qt6-qtbase-6.7.0-0.rc1.1.x86_64/src/widgets/kernel/qwidget.cpp:8240
#6  0x00007ffff6926470 in QWidgetPrivate::setVisible (this=0x555555e45730, visible=false)
    at /usr/src/debug/qt6-qtbase-6.7.0-0.rc1.1.x86_64/src/widgets/kernel/qwidget.cpp:8433
#7  0x00007ffff692f4fd in QWidget::setVisible (this=0x555555f17b50, visible=false)
    at /usr/src/debug/qt6-qtbase-6.7.0-0.rc1.1.x86_64/src/widgets/kernel/qwidget.cpp:8341
#8  0x00005555555f1f4d in DolphinViewContainer::DolphinViewContainer(QUrl const&, QWidget*) ()
#9  0x000055555560238e in DolphinTabPage::createViewContainer(QUrl const&) const ()
#10 0x00005555556063a0 in DolphinTabWidget::openNewTab(QUrl const&, QUrl const&, DolphinTabWidget::NewTabPosition) ()
#11 0x0000555555609296 in DolphinTabWidget::openDirectories(QList<QUrl> const&, bool) ()
#12 0x00005555555ce421 in main ()