@prog tess-scan.muf 1 999 d 1 i : say me @ swap notify ; : main 0 swap loc @ "_stack-push-ok" getpropstr "" strcmp if "Stack: stack potential non-zero, pushing allowed." say swap pop 1 swap then dup if match else pop #-1 then dup ok? if "_stack-desc" getpropstr dup if "Stack: " swap strcat say pop 1 else pop then else pop then not if "Stack: nothing special to report." say then ; . c q