Ticket #20845: 20845-1.patch

src/wp-includes/pluggable.php

@@ -26 +26 @@
 function wp_set_current_user($id, $name = '') {
         global $current_user;
 
-        if ( isset( $current_user ) && ( $current_user instanceof WP_User ) && ( $id == $current_user->ID ) )
+        if ( isset( $current_user ) && ( $current_user instanceof WP_User ) && ( $id === $current_user->ID ) )
                 return $current_user;
 
         $current_user = new WP_User( $id, $name );