Url passed from the QFileDialogArgs will never be invalid, it will always be the value that user passed into or the lastVisited or the working directory. And because of this, the fixes code of QTBUG-70798 will never be invoked, and the `lastVisited` will never be initialize if nativedialog is in use. I wrote an init function to initialize the `lastVisited` global variable, to make sure the value will be loaded correctly Fixes: QTBUG-70798 Pick-to: 6.8 6.9 Change-Id: Id05f63db7b4738e6317721741111882a565437e3 Reviewed-by: Xu Shitong <xushitong@uniontech.com> Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>