Assert failure with QRegion: extents.intersects(rect)

Updating widgets on 32-bit system fails when rectangles are positioned to the edge of integer (INT_MIN, INT_MAX).

ASSERT: "extents.intersects(rect)" in file painting\qregion.cpp, line 1255

The attached application can be used to reproduce the issue. There the failure is illustrated by calling the update() method with valid rectangles.

void MainWindow::onUpdateAction()
{ 
    {
        QRect r(ui->pushButton->rect());
        r.setLeft(-2147483648);
        r.setWidth(1);
        ui->pushButton->update(r);
	}
    {
        QRect r(ui->pushButton->rect());
        r.setLeft(1395387);
        r.setWidth(1);
        ui->pushButton->update(r);
    }
}

It looks like in ‘QRegion QRegion::intersect(const QRect &r) const’ the ‘result.d->qt_rgn’ rectangle is not constructed correctly (it’s width is over INT_MIN).

Attached also stack trace of the crash.