(exec-missing) begin
+load: no-such-file: open failed
+(exec-missing) exec("no-such-file"): -1
+(exec-missing) end
+exec-missing: exit(0)
+--OR--
+(exec-missing) begin
+load: no-such-file: open failed
+no-such-file: exit(-1)
(exec-missing) exec("no-such-file"): -1
(exec-missing) end
exec-missing: exit(0)