Ticket #38282: 38282.diff

src/wp-trackback.php

@@ -112 +112 @@
 
         $commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type');
 
-        wp_new_comment($commentdata);
-        $trackback_id = $wpdb->insert_id;
+        $trackback_id = wp_new_comment( $commentdata, true );
+        if ( is_wp_error( $trackback_id ) )  {
+                trackback_response( 1, $trackback_id->get_error_message() );
+        }
 
+        if ( ! $trackback_id ) {
+                trackback_response( 1, __( 'Unknown error occured.' ) );
+        }
+
         /**
          * Fires after a trackback is added to a post.
          *