Joel Grus - Advent of Livecoding - 2017 Day 7

In which I livecode the day 7 problem for Advent of Code without having looked at it in advance. This one was a little bit harder than the previous few, and it got sort of messy at times, but I think that actually made it a lot more interesting. (Can you find the bug that I couldn't find at the end? I figured it out when I watched through the video again.)