Ticket #10381: 10381.2.diff

wp-includes/post.php

@@ -262 +262 @@
                         _get_post_ancestors($_post);
                         $_post = sanitize_post($_post, 'raw');
                         wp_cache_add($_post->ID, $_post, 'posts');
+                } elseif ( !isset($_post->ancestors) ) {
+                        global $_wp_using_ext_object_cache;
+                        if ( $_wp_using_ext_object_cache ) {
+                                _get_post_ancestors($_post);
+                                wp_cache_replace($_post->ID, $_post, 'posts');
+                        }
                 }
         }