Ticket #34977: 34977.2.patch

src/wp-includes/comment.php

@@ -2010 +2010 @@
 function wp_update_comment_count($post_id, $do_deferred=false) {
         static $_deferred = array();
 
+        if ( empty( $post_id ) && ! $do_deferred ) {
+                return false;
+        }
+
         if ( $do_deferred ) {
                 $_deferred = array_unique($_deferred);
                 foreach ( $_deferred as $i => $_post_id ) {