From 4b5ba713079cfb850ee7825cf5cdefd2582377e0 Mon Sep 17 00:00:00 2001
From: MinRK <benjaminrk@gmail.com>
Date: Thu, 2 May 2013 23:59:39 -0700
Subject: [PATCH] protect highlight.js against unknown languages

falls back on autodetect if specified language fails (e.g. unrecognized language).

closes #3268
---
 IPython/frontend/html/notebook/static/js/notebookmain.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/IPython/frontend/html/notebook/static/js/notebookmain.js b/IPython/frontend/html/notebook/static/js/notebookmain.js
index 45e9c1f86..77ab8deac 100644
--- a/IPython/frontend/html/notebook/static/js/notebookmain.js
+++ b/IPython/frontend/html/notebook/static/js/notebookmain.js
@@ -101,9 +101,9 @@ $(document).ready(function () {
             langPrefix: "language-",
             highlight: function(code, lang) {
                 var highlighted;
-                if (lang) {
+                try {
                     highlighted = hljs.highlight(lang, code, false);
-                } else {
+                } catch(err) {
                     highlighted = hljs.highlightAuto(code);
                 }
                 return highlighted.value;