Ticket #16565: 16565-comment.php.patch

wp-includes/comment.php

@@ -1265 +1265 @@
         $commentdata['comment_content']      = apply_filters('pre_comment_content', $commentdata['comment_content']);
         $commentdata['comment_author_IP']    = apply_filters('pre_comment_user_ip', $commentdata['comment_author_IP']);
         $commentdata['comment_author_url']   = apply_filters('pre_comment_author_url', $commentdata['comment_author_url']);
-        $commentdata['comment_author_email'] = apply_filters('pre_comment_author_email', $commentdata['comment_author_email']);
+        $commentdata['comment_author_email'] = apply_filters('pre_comment_author_email', isset($commentdata['comment_author_email']) ? $commentdata['comment_author_email'] : '');
         $commentdata['filtered'] = true;
         return $commentdata;
 }