unhelpful error message

[increpare]

Complicated example for further investigation later

load up
https://www.puzzlescript.net/editor.html?hack=a055fe14cc07565f21df3d571ef990c6

load up the first level, notice it spits out some error message
[line 377](javascript:void(0);) : Got caught looping lots in a rule group :O (x101)
but it's somewhat hard to know where it's coming from! is it coming from the 'again' precalculations? hmm!