Ticket #27130: 27130.patch

src/wp-includes/user.php

@@ -22 +22 @@
  * @param bool $secure_cookie Optional. Whether to use secure cookie.
  * @return object Either WP_Error on failure, or WP_User on success.
  */
-function wp_signon( $credentials = '', $secure_cookie = '' ) {
+function wp_signon( $credentials = array(), $secure_cookie = '' ) {
         if ( empty($credentials) ) {
                 if ( ! empty($_POST['log']) )
                         $credentials['user_login'] = $_POST['log'];