Ticket #37416: 37416.2.patch

src/wp-includes/class-wp-comment-query.php

@@ -1017 +1017 @@
 
                 // Prime comment caches for non-top-level comments.
                 $descendant_ids = array();
-                for ( $i = 1; $i < count( $levels ); $i++ ) {
+                for ( $i = 1, $c = count( $levels ); $i <= $c; $i++ ) {
                         $descendant_ids = array_merge( $descendant_ids, $levels[ $i ] );
                 }