From 3230952d57023cddefc62fde4c525b29f93680e0 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Mon, 8 Jun 2020 04:16:03 +0100
Subject: [PATCH] improve handling of invalid CLI options (#3966)

---
 bin/uglifyjs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/bin/uglifyjs b/bin/uglifyjs
index c15acca6..fcbdff66 100755
--- a/bin/uglifyjs
+++ b/bin/uglifyjs
@@ -40,6 +40,7 @@ while (args.length) {
     } else if (arg[1] == "-") {
         process_option(arg.slice(2));
     } else [].forEach.call(arg.slice(1), function(letter, index, arg) {
+        if (!(letter in short_forms)) fatal("invalid option -" + letter);
         process_option(short_forms[letter], index + 1 < arg.length);
     });
 }
-- 
2.34.1