Missing element from rapydscript.js?

[BruceSherwood]

I found that I had to insert the following code at the start of rapydscript.js, code I inherited from some time ago:

var ρσ_iterator_symbol = (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") ? Symbol.iterator : "iterator-Symbol-5d0927e5554349048cf0e3762a228256";
var ρσ_kwargs_symbol = (typeof Symbol === "function") ? Symbol("kwargs-object") : "kwargs-object-Symbol-5d0927e5554349048cf0e3762a228256";
var ρσ_cond_temp, ρσ_expr_temp, ρσ_last_exception;
var ρσ_object_counter = 0;

Should the building of rapydscript.js include such a preamble?