Ticket #27278: 27278.4.diff

src/wp-includes/theme.php

@@ -1398 +1398 @@
                 case 'html5' :
                         // You can't just pass 'html5', you need to pass an array of types.
                         if ( empty( $args[0] ) ) {
-                                $args = array( 0 => array( 'comment-list', 'comment-form', 'search-form' ) );
+                                _doing_it_wrong( "add_theme_support( 'html5' )", 'You need to pass an array of types.', '3.6.1' );
+                                $args = array( 0 => array( 'comment-list', 'comment-form', 'search-form' ) ); // Back compat
                         } elseif ( ! is_array( $args[0] ) ) {
                                 _doing_it_wrong( "add_theme_support( 'html5' )", 'You need to pass an array of types.', '3.6.1' );
                                 return false;