Will my friend face issues when applying for a Non-B visa after his ED visa expired while he was still in Thailand?

The question concerns a friend whose Education Visa (ED) expired on 30 October 2018, although he completed his studies on 20 July 2018 and left Thailand prior to the visa expiry. The primary inquiry is whether this situation constitutes an overstay that would affect future applications for a Non-B visa, and whether there would be a penalty fee involved.