Ticket #27413: 27413.2.patch

src/wp-includes/category-template.php

@@ -622 +622 @@
         $args = wp_parse_args( $args, $defaults );
         extract( $args, EXTR_SKIP );
 
-        if ( empty( $tags ) )
+        if ( empty( $tags ) ) {
                 return;
+        }
 
         // Juggle topic count tooltips:
         if ( isset( $args['topic_count_text'] ) ) {
@@ -645 +646 @@
         }
 
         $tags_sorted = apply_filters( 'tag_cloud_sort', $tags, $args );
+
+        if ( empty( $tags_sorted ) ) {
+                return;
+        }
+
         if ( $tags_sorted != $tags  ) { // the tags have been sorted by a plugin
                 $tags = $tags_sorted;
                 unset($tags_sorted);