Ok, I see the case: it is if you actually literally have "." on your PATH. I never ever do this--and consider it super super dangerous--and so it never occurred

Ok, I see the case: it is if you actually literally have "." on your PATH. I never ever do this--and consider it super super dangerous--and so it never occurred to me to test that case. So like, if I have "~/bin" on my path, it is converted to an absolute path, but if I have "." on my path and I am in that folder it gives me just foo. Thanks for helping me understand that case...