Stalin, but there's no need to make the whole program freeze. If compiled code needs to inline operators, just inline them as they are in that particular function, and let the rest of the world keep on changing. If it turns out to matter later, you can always say (recompile function) or something like that. Maybe (update-internal-defs function) would be better.
It would make it a lot easier if you just kept the code to all interpreted functions you defined around, so you could just inline them with whatever definition happened to be around. Keeping the code around is a good thing anyway, though, so that's all right.
(Note: I do not mean keep the code to compiled functions. That would be bad, because compiled function objects are exactly how an ffi is going to get into arc later. We don't want to start assuming that everything has sexps. This does make update-internal-defs a little weird, though. Even though they don't necessarily have sexps, I think they do need to have a table listing everything from the environment that they use.)
