diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-includes/feed-rss.php
--- a/wp/wp-includes/feed-rss.php	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-includes/feed-rss.php	Mon Oct 14 17:39:30 2019 +0200
@@ -5,16 +5,19 @@
  * @package WordPress
  */
 
-header('Content-Type: ' . feed_content_type('rss-http') . '; charset=' . get_option('blog_charset'), true);
+header('Content-Type: ' . feed_content_type('rss') . '; charset=' . get_option('blog_charset'), true);
 $more = 1;
 
 echo '<?xml version="1.0" encoding="'.get_option('blog_charset').'"?'.'>'; ?>
 <rss version="0.92">
 <channel>
-	<title><?php bloginfo_rss('name'); wp_title_rss(); ?></title>
+	<title><?php wp_title_rss(); ?></title>
 	<link><?php bloginfo_rss('url') ?></link>
 	<description><?php bloginfo_rss('description') ?></description>
-	<lastBuildDate><?php echo mysql2date('D, d M Y H:i:s +0000', get_lastpostmodified('GMT'), false); ?></lastBuildDate>
+	<lastBuildDate><?php
+		$date = get_lastpostmodified( 'GMT' );
+		echo $date ? mysql2date( 'D, d M Y H:i:s +0000', $date ) : date( 'D, d M Y H:i:s +0000' );
+	?></lastBuildDate>
 	<docs>http://backend.userland.com/rss092</docs>
 	<language><?php bloginfo_rss( 'language' ); ?></language>