diff --git a/wp-includes/class-wp-comment-query.php b/wp-includes/class-wp-comment-query.php
index f2ccc832e7..c8fed2586a 100644
--- a/wp-includes/class-wp-comment-query.php
+++ b/wp-includes/class-wp-comment-query.php
@@ -1012,7 +1012,7 @@ class WP_Comment_Query {
 
 		// 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 ] );
 		}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 530fc52889..1231f9f757 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38296';
+$wp_version = '4.7-alpha-38297';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.