Ticket #24491: 24491.patch

wp-includes/post.php

@@ -3554 +3554 @@
  * @since 1.5.0
  *
  * @param mixed $page Page object or page ID.
- * @return string Page URI.
+ * @return string|false Page URI, false on error.
  */
 function get_page_uri($page) {
         $page = get_post( $page );
 
+        if ( ! $page )
+                return false;
+
         $uri = $page->post_name;
 
         foreach ( $page->ancestors as $parent ) {
-                $uri = get_post( $parent )->post_name . "/" . $uri;
+                $uri = get_post( $parent )->post_name . '/' . $uri;
         }
 
         return $uri;