From c5e5ed86f66de1338a067787d2e05038dfd1a3db Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Wed, 15 Apr 2015 10:38:26 -0700
Subject: [PATCH] fix surrogate crash.

---
 lib/widget.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/widget.js b/lib/widget.js
index f4eaed9..40978ff 100644
--- a/lib/widget.js
+++ b/lib/widget.js
@@ -3997,7 +3997,7 @@ Element.prototype.render = function() {
 
       // Handle surrogate pairs:
       // Make sure we put surrogate pair chars in one cell.
-      if (this.screen.fullUnicode) {
+      if (this.screen.fullUnicode && content[ci - 1]) {
         var code = content[ci - 1].charCodeAt(0);
         // if (content.codePointAt(ci - 1) > 0xffff) {
         if (code >= 0xd800 && code <= 0xdbff) {