From d1c71ab7adfbf2536584eb67f655f5e7287cf601 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Mon, 2 Jun 2014 14:29:54 +0200
Subject: [PATCH] Prevent adding undefined array entries to CMap.map in
 mapRangeToArray (issue 4875)

---
 src/core/cmap.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/core/cmap.js b/src/core/cmap.js
index f19529035..792c679df 100644
--- a/src/core/cmap.js
+++ b/src/core/cmap.js
@@ -222,8 +222,8 @@ var CMap = (function CMapClosure() {
     },
 
     mapRangeToArray: function(low, high, array) {
-      var i = 0;
-      while (low <= high) {
+      var i = 0, ii = array.length;
+      while (low <= high && i < ii) {
         this.map[low] = array[i++];
         ++low;
       }