Not trolling here. I'm curious why this is getting so much attention. Isn't saying "this should never happen" just making an assertion about the behavior of y

Not trolling here. I'm curious why this is getting so much attention. Isn't saying "this should never happen" just making an assertion about the behavior of your code? As far as the apparent inconsistencies in the code seen in the results go, is it really fair to judge a random piece of code from a random person (and completely out of context)? Don't we all have scratch/experimental/incomplete code hosted on our github accounts?