18:57
https://www.jigidi.com/solve/sd32gq5t/easy-9-piece-geocaching-test-puzzle-with-completion-message/
lines 18232/18233:
for (var z = 0, f = 2 – 2; Y > f; ++f) {
console in this case: f = 9 or f = Y

19:55
same puzzle
lines 20911/20912
for (var h = 0, x = 0; x < B; ++x) {
console in this case: x = 9 or x = B

As you can see, it's no use to look for breakpoints, line numbers, variable names as they change within minutes.
The only thing is to search for the double for statement as described in former posts.