DVM_DUPLICATE     470 compiler/generate.c 	generate_code(ob, expr->line_number, DVM_DUPLICATE);
DVM_DUPLICATE     536 compiler/generate.c     generate_code(ob, expr->line_number, DVM_DUPLICATE);
DVM_DUPLICATE     552 compiler/generate.c     generate_code(ob, expr->line_number, DVM_DUPLICATE);
DVM_DUPLICATE     635 compiler/generate.c 	generate_code(ob, expr->line_number, DVM_DUPLICATE);
DVM_DUPLICATE    1017 dvm/execute.c  	case DVM_DUPLICATE: