Pretty sure this is not a bug but just a poopy Chromium build, but nevertheless:
Does anyone happen to be on Linux, using Chromium 62.0.3202.94?
The editor loads, then runs for a few seconds, and produces a hard "Aw, snap" and the process of the tab spits out a stack trace.
I can see on the js console that the editor is spawning his lot of service workers while it happens.