Yeah I'm dying to see the original C code but it isn't on the page anywhere, AFAICT.

From the article, about the C version: "Mine hadn't worked, which I suspect is some sort of compiler issue."

Yeah I'm going to go out on a limb and proclaim that there's no way this was due to a compiler "issue" in gcc. Not that gcc is perfect, but there's no way it is barfing on one of these handful of line programs that does nothing but some logical operations and printfs.