[E] new compiler error re: SET-DISPATCH-MACRO-CHARACTER

[Robert Goldman]

I'm with Faré on this one.  I don't see evidence that this change is 
because ASDF is doing something bad.  I believe it's consistent with the 
hypothesis that there was some imperfectly-controlled aspect of building 
that is done differently now (e.g., files loaded in a different order 
where both orders are compatible with the constraints in the system 
definitions).

This doesn't even look like an ASDF error to me -- it looks like an 
error that occurred while loading a system that ASDF has re-packaged.

So we might be able to help you debug this, but without more evidence, 
there's no reason to believe that ASDF has done anything to you: it 
looks like the change in ASDF just reveals a pre-existing bug.