Ticket #12729: 12729.2.diff

src/wp-includes/taxonomy.php

@@ -2380 +2380 @@
         }
 
         // If we didn't get a unique slug, try appending a number to make it unique.
-        if ( !empty($args['term_id']) )
-                $query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s AND term_id != %d", $slug, $args['term_id'] );
+        if ( ! empty( $term->term_id ) )
+                $query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s AND term_id != %d", $slug, $term->term_id );
         else
                 $query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $slug );