Hello I was playing the game and a runtime error occurred and said "runtime error line 495 tab 1 if (#output > 0) and (out_cell == 0) then attempt to get length of local 'output' (a nil value)"
I've been hitting this crash recently, I think it has to do with bridges. I've been trying to get some high-density factory stuff going and this 2x2 intersection seems to fairly regularly stop working (some items turn instead of going through the bridge) and causes a game crash.