QPainter render images incorrectly when QPainter::Antialiasing | QPainter::SmoothPixmapTransform hints applied

QPainter drawImage/Pixmap render wrong when (QPainter::Antialiasing | QPainter::SmoothPixmapTransform) flags applied together

See testcase in attachments, output result should display 2 solid buttons without vertical line artifacts.
With current Qt it produce vertical white line on the edge of two images.