Redirects: Prevent redirects if a queried object exists.

After [34659], it became possible to cause an incorrect redirect, by changing the slug of a post, then creating a new post with the old slug. The correct behaviour is to prevent redirecting to the old post.

Props dd32, pento.

Fixes #35031 for trunk.



git-svn-id: https://develop.svn.wordpress.org/trunk@36128 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/query.php

@@ -4956,6 +4956,10 @@ class WP_Query {
 function wp_old_slug_redirect() {
 	global $wp_query, $wp_rewrite;
 
+	if ( get_queried_object() ) {
+		return;
+	}
+
 	if ( '' !== $wp_query->query_vars['name'] ) :
 		global $wpdb;