See snippet below. IMHO the second call to add1 should fail. On guile-2.2.6 it does not error out. On guile-2.0 it does throw error (as I think it should). Is this intentional? =-=-= (define (main) (define (add1 num) (+ num 1)) (display "testing") (display (add1 2)) (display (add1 2 3))) (main) =-=-=