I see. I’ve been programming in Elixir for about 10 years, and I had never run into this “behavior” before—perhaps because I always used is_nil/1 or is_number/1 in guards. But today, my tests started failing after I added a guard like when ver > 25.
What surprised me is that two AIs insisted it couldn’t be true. ChatGPT even gave me several links “proving” it would raise an error, but those links pointed to Elixir pages that didn’t actually mention anything related to this specific case.
thanks
