alt Hacker News> So if you standard says 'you have to crash with an error message' that's already no longer UB.
Sure. For crashes. But when you instruct an LLM to do something, the output is probablistic, so you may get behviour that is unexpected and/or unwanted.
Like storing security tokens in code. Or nuking the production database.
If you fix the random seed you use for sampling, your LLM is perfectly deterministic.
And there's no requirement for C compilers' UB to be deterministic either.