Ticket #27959: 27959.diff

src/wp-includes/theme.php

@@ -1180 +1180 @@
         foreach ( (array) $headers as $header ) {
                 $url = esc_url_raw( wp_get_attachment_url( $header->ID ) );
                 $header_data = wp_get_attachment_metadata( $header->ID );
+                $alt = get_post_meta( $header->ID, '_wp_attachment_image_alt', true );
                 $header_index = basename($url);
                 $header_images[$header_index] = array();
                 $header_images[$header_index]['attachment_id'] =  $header->ID;
                 $header_images[$header_index]['url'] =  $url;
+                $header_images[$header_index]['alt'] = $alt;
                 $header_images[$header_index]['thumbnail_url'] =  $url;
                 if ( isset( $header_data['width'] ) )
                         $header_images[$header_index]['width'] = $header_data['width'];