From b73eb563b060037fe3b79edda6428c4e10004919 Mon Sep 17 00:00:00 2001
From: lpy <pylaurent1314@gmail.com>
Date: Wed, 26 Feb 2014 14:30:13 +0800
Subject: [PATCH] Add empty text check for first child of pre in
 innerHTML.(fixes #1743)

---
 src/components/script/dom/htmlserializer.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/components/script/dom/htmlserializer.rs b/src/components/script/dom/htmlserializer.rs
index 482c724666b..e6822e79215 100644
--- a/src/components/script/dom/htmlserializer.rs
+++ b/src/components/script/dom/htmlserializer.rs
@@ -104,7 +104,7 @@ fn serialize_elem(elem: &JS<Element>, open_elements: &mut ~[~str]) -> ~str {
             match elem.get().node.first_child {
                 Some(ref child) if child.is_text() => {
                     let text: JS<CharacterData> = CharacterDataCast::to(child);
-                    if text.get().data[0] == 0x0A as u8 {
+                    if text.get().data.len() > 0 && text.get().data[0] == 0x0A as u8 {
                         rv.push_str("\x0A");
                     }
                 },