From 79bf7a0a29de4cae7c5cdf26f494cdb00a8820a3 Mon Sep 17 00:00:00 2001
From: "jst%netscape.com"
 <jst%netscape.com@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Fri, 10 May 2002 18:21:50 +0000
Subject: [PATCH] Fixing bug 135278. Stop don't use Substring() on a null
 poiter, Substring() asserts if given a null pointer.
 r=dbaron@fas.harvard.edu, sr=jaggernaut@netscape.com

git-svn-id: svn://10.0.0.236/trunk@121264 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/content/base/src/nsGenericDOMDataNode.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/mozilla/content/base/src/nsGenericDOMDataNode.cpp b/mozilla/content/base/src/nsGenericDOMDataNode.cpp
index d9c399c3ed7..4c35bead99d 100644
--- a/mozilla/content/base/src/nsGenericDOMDataNode.cpp
+++ b/mozilla/content/base/src/nsGenericDOMDataNode.cpp
@@ -434,7 +434,12 @@ nsGenericDOMDataNode::GetData(nsAString& aData)
     // terminated strings.
 
     const char *data = mText.Get1b();
-    CopyASCIItoUCS2(Substring(data, data + mText.GetLength()), aData);
+
+    if (data) {
+      CopyASCIItoUCS2(Substring(data, data + mText.GetLength()), aData);
+    } else {
+      aData.Truncate();
+    }
   }
 
   return NS_OK;