From 34a3f8e34d6a6f9a26a3f8a159f8eb699b332725 Mon Sep 17 00:00:00 2001
From: Dmitry-Me <wipedout@yandex.ru>
Date: Mon, 19 Dec 2016 12:05:21 +0300
Subject: [PATCH] Ensure existing attributes are not leaked on attribute
 insertion

---
 tinyxml2.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index 96f3ad7..6fd9363 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -1717,9 +1717,11 @@ XMLAttribute* XMLElement::FindOrCreateAttribute( const char* name )
         attrib = CreateAttribute();
         TIXMLASSERT( attrib );
         if ( last ) {
+            TIXMLASSERT( last->_next == 0 );
             last->_next = attrib;
         }
         else {
+            TIXMLASSERT( _rootAttribute == 0 );
             _rootAttribute = attrib;
         }
         attrib->SetName( name );
@@ -1777,9 +1779,11 @@ char* XMLElement::ParseAttributes( char* p )
             // avoids re-scanning the attribute list. Preferring performance for
             // now, may reconsider in the future.
             if ( prevAttribute ) {
+                TIXMLASSERT( prevAttribute->_next == 0 );
                 prevAttribute->_next = attrib;
             }
             else {
+                TIXMLASSERT( _rootAttribute == 0 );
                 _rootAttribute = attrib;
             }
             prevAttribute = attrib;