How could that be avoided? by definition, early bound is evaluated "earlier" than  late-bound :-)

early-bound (i.e. regular) parameters are evaluated at function definition time. But the time we get to the late-bound ones, those are actual values, not expressions.

The interpreter could notice that early bound names are used in late-bound expressions and raise an error, but if not, there'd be no issue with when they were evaluated.

This could cause a bit of confusion with "getting" that it's not a simple left-to-right rule, but that's the same potential confusion with early vs late bound parameters anyway.

-CHB