> I content that in normal code, it is so extremely rare as to be
> unheard of, to get exceptions about the parser stack overflowing or
> segfault the compiler by too deep nesting. People who are doing this
> (generally to prove the point about limitations of the compiler) are
> smart enough to know exactly what "parser stack overflowed" means and
> separate that from Python as the language. Adding a new exception is
> solving a non-existent problem.

Agreed with Benjamin. Also, "why something is wrong" can simply be told
in the exception message.