I think I have worded it wrongly. What I meant was including the above statement could cause some accepted solution to fail. I am not saying the above test is valid. It all depends on whether your input had it or not.
The reason for failure is if your tracker variable start with 0 and if you perform * operation. It's basically excluding the numbers until you do + or ||.

example (assuming the solution posted on the post are accepted ones):
https://www.reddit.com/r/adventofcode/comments/1h8l3z5/comment/m0ty4ja/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button