[racket] export/import problem, and how to debug

>> Matthias, is it intentional that you are using this mechanism?
>
>
> You mean that I create my own error messages?

No, rather: is it intentional that you chose to use separate macros
for each clause -- "bindings" rather than "symbols", as Jay put it.

> If you add something to universe, I'd expect very much that
> you live up to the same level of error messages

I'd never have guessed the quality of error messages matters.

Shriram