From 59a4e56bc81ce96b3ee81ad4f068cfc7d89a4790 Mon Sep 17 00:00:00 2001
From: "Alex Lam S.L" <alexlamsl@gmail.com>
Date: Mon, 3 Apr 2017 12:31:05 +0800
Subject: fix mangleProperties of `undefined` & `Infinity` (#1772)

`NaN` already works by the happy accident of `Number.NaN`

fixes #1770
---
 lib/propmangle.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'lib/propmangle.js')

diff --git a/lib/propmangle.js b/lib/propmangle.js
index cfa035d2..c1e8c7e4 100644
--- a/lib/propmangle.js
+++ b/lib/propmangle.js
@@ -44,7 +44,11 @@
 "use strict";
 
 function find_builtins() {
-    var a = [];
+    // NaN will be included due to Number.NaN
+    var a = [
+        "Infinity",
+        "undefined",
+    ];
     [ Object, Array, Function, Number,
       String, Boolean, Error, Math,
       Date, RegExp
-- 
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