This comment breaks the Show HN guidelines: https://news.ycombinator.com/showhn.html and arguably the site guidelines also: https://news.ycombinator.com/newsguidelines.html

It's great to give helpful feedback about bugs, but please edit out swipes like "Major fail" when doing so. They're especially noxious when someone's presenting their own work. We want people do to that freely on HN, and get helpful feedback, not internet nastiness.