From 69b566365303583ab7fa0e89288b86dbebc5c676 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Tue, 2 May 2017 01:42:29 +0800
Subject: [PATCH] restore report of supported options (#1861)

fixes #1859
---
 bin/uglifyjs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/bin/uglifyjs b/bin/uglifyjs
index e89b68a7..57e33d9b 100755
--- a/bin/uglifyjs
+++ b/bin/uglifyjs
@@ -205,6 +205,10 @@ function run() {
                 console.error(line.slice(0, col).replace(/\S/g, " ") + "^");
             }
         }
+        if (ex.defs) {
+            console.error("Supported options:");
+            console.error(ex.defs);
+        }
         fatal("ERROR: " + ex.message);
     }
     if (program.output == "spidermonkey") {