Ticket #37444: 37444a.patch

wp-includes/template.php

@@ -90 +90 @@
  * @return string Full path to archive template file.
  */
 function get_archive_template() {
-        $post_types = array_filter( (array) get_query_var( 'post_type' ) );
+  $post_types = (array) get_query_var( 'post_type' );
+        $post_types = array_filter( $post_types );
 
         $templates = array();