Ticket #12320: 12320.2.diff

wp-includes/default-widgets.php

@@ -554 +554 @@
                 </ul>
                 <?php echo $after_widget; ?>
 <?php
-                        wp_reset_query();  // Restore global post data stomped by the_post().
+                wp_reset_postdata();
+
                 endif;
 
                 $cache[$args['widget_id']] = ob_get_flush();

wp-includes/query.php

@@ -75 +75 @@
 function wp_reset_query() {
         unset($GLOBALS['wp_query']);
         $GLOBALS['wp_query'] =& $GLOBALS['wp_the_query'];
+        wp_reset_postdata();
+}
+
+/**
+ * After looping through a separate query, this function restores
+ * the $post global to the last post in the main query
+ *
+ * @since 3.0.0
+ * @uses $wp_query
+ */
+function wp_reset_postdata() {
         global $wp_query;
         if ( !empty($wp_query->post) ) {
                 $GLOBALS['post'] = $wp_query->post;