Index: CHANGELOG.txt
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/cck/Attic/CHANGELOG.txt,v
retrieving revision 1.1.6.400
diff -u -p -r1.1.6.400 CHANGELOG.txt
--- CHANGELOG.txt	10 Nov 2010 17:57:05 -0000	1.1.6.400
+++ CHANGELOG.txt	3 Dec 2010 16:26:46 -0000
@@ -5,6 +5,7 @@ CCK 6.x-2.x
 
 - #863226 by KarenS: make sure we have a function that will return inactive instances when other instances of the same field are still active.
 - #887742 by yched: fix notices in _content_get_formatter() in some Views
+- #736440 by yched, dhthwy: fix memory leaks on long running migration scripts (e.g. migrate.module)
 
 CCK 6.x-2.8
 ===========
Index: includes/content.token.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/cck/includes/Attic/content.token.inc,v
retrieving revision 1.5.2.8
diff -u -p -r1.5.2.8 content.token.inc
--- includes/content.token.inc	5 Dec 2008 14:59:22 -0000	1.5.2.8
+++ includes/content.token.inc	3 Dec 2010 16:26:46 -0000
@@ -24,7 +24,10 @@ function token_content_build_modes() {
 function content_token_values($type, $object = NULL) {
   $tokens = array();
   if ($type == 'node') {
-    $node = $object;
+    // Let PHP free the $node object when we are done. Working directly on the
+    // incoming $object causes memory leak issues on long-running scripts such
+    // as migrations. See http://drupal.org/node/736440.
+    $node = clone $object;
     // Prevent against invalid 'nodes' built by broken 3rd party code.
     if (isset($node->type)) {
       $type = content_types($node->type);