From 7785f53d74b420685bf80883d13ec084129f2bfd Mon Sep 17 00:00:00 2001
From: b-fuse <b-fuze.root@live.com>
Date: Fri, 30 Mar 2018 20:03:51 -0400
Subject: [PATCH] fix for test I was running npm test with node 7 and didn't
 get any errors, updated to node 9 and now I get the errors. So here's the
 fix.

---
 bin/uglifyjs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bin/uglifyjs b/bin/uglifyjs
index f49b96b0..f4f299d3 100755
--- a/bin/uglifyjs
+++ b/bin/uglifyjs
@@ -176,7 +176,7 @@ function convert_ast(fn) {
 }
 
 function run() {
-    if (program.sourceMap.content === source_map_stub) {
+    if (program.sourceMap && program.sourceMap.content === source_map_stub) {
         program.sourceMap.content = read_file(source_map_stub.path, source_map_stub.path);
     }