In Lisp, how do I fix “Warning: Assumed Special?”

Question

In this file I get 9 warnings of \"assumed special\". They are

;;;*** Warning in CHECK-ROW: CHECKARRAY assumed special in SETQ
;;;*** Warning in CHECK-ROW: R         


        

Answer 1

The difference is that setq is not, strictly speaking, supposed to be used to define a variable (I am not exactly sure why, since it does define a variable).

Use defvar for globals and the let construct for locals.