IMHO, it would be fine if the debugger simply had enough error handlers
that it cleanly survives this situation.  ProtoObjects do *not* have all
the niceties like debugability, printability, etc. etc.

There should be a big warning in this class, not to touch it unless you
really know what you are doing!  We could go in circles forever, beefing
up ProtoObject and then making a ProtoProtoObject for people who do, in
fact, want to live dangerously and play with objects that don't even
have basic methods defined on them.

-Lex