QtFuture::connect includes Q*::QPrivateSignal as one of the arguments

Given this code:

QTimer timer;
//...
auto future = QtFuture::connect(&timer, &QTimer::timeout);

The type of 'future' is not QFuture<void> like one would imagine from the documentation (https://doc.qt.io/qt-5/qtimer.html#timeout), but QFuture<QTimer::QPrivateSignal>.

QPrivateSignal isn't used a lot so it's not a big deal, but it looks weird in cases where it is used.