QFileSelector::select(const QUrl &filepath) returns "" when QUrl("file:///") is passed into it (root directory)

In QFileSelectorPrivate::select(const QString&)

I see that QLatin1Char('/') is appended unconditionally, without checking whether fi.path() is already contains a slash at the end. Thus when "/" is passed, another "/" is appended, which leads to "//" string and QUrl::fromLocalFile(const QString&) chops it down, treating path as remote one, with an empty string left.