Don't worry too much about it, it crashed 3/4 for me too at the Classroom render doesn't matter whether it's GPU or CPU it will randomly crash. I use Blender on a daily basis and run renders all the time so I know it's not my system, something I have noticed and probably makes this a touch invalid for an official bench right now is that it's running on Blenders Beta 2.80 engine. Most if not all Blender users are still on 2.79b or the real early access 2.90 (real time rendering, can't wait for that).