6af4e5f604
A Toplevel QWidget can hold a pointer to the screen where it will eventually show contents, before a QWidgetWindow is created which then takes precedence. The screen member of QWindows is always kept up-to-date when a screen is removed, but not the contents of a toplevel window. If a widget has setScreen called but is never shown, it has potentially dangling pointer which can cause issues in the future. Pick-to: 6.7 6.5 Change-Id: Ia7c80549e8b3c90a75cdde745487e87ecddaca63 Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io> (cherry picked from commit d67acf94afffde6a71498be6e30447f3acf7558e) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>