[Minigrep] - panic at config

minigrep/src/main.rs

@@ -6,6 +6,9 @@ struct Config {
 }
 impl Config {
     fn new(args: &[String]) -> Config {
+        if args.len() < 3 {
+            panic!("not enough arguments");
+        }
         let query = args[1].clone();
         let file_path = args[2].clone();
         Config { query, file_path }