On my Mac (running Catalina), with release 800, branch 64x (core compiled using "make"):
(defglobal ?*potential-numbers* = (create$ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 ))
(defglobal ?*numbers* = (subseq$ ?*potential-numbers* 1 9))
?*numbers*
(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 )