I was running out the door when I made the post, and wound up screenshotting the wrong tab by mistake. The correct tab had a big error message like "We're sorry, we didn't generate this code blob fast enough for you" with no raw link. Sorry about that.
On the very slim chance that a Github staffer is reading this, here's the link that was down for ~30 minutes: https://github.com/kaniini/slabbed-or-not/blob/master/slabbe... ... It was down at around 8pm PST.