Error on line 0 of stdin: interpreter thinks " dup eq " not defined [ ] 0 23 object / { } def / { } def / -operator- def / { } def / -operator- def / -operator- def / { } def / { 2 { 3 -1 } } def / -operator- def / -operator- def / { 1 { } 1 . { } { } } def / -operator- def / -operator- def / -operator- def --