8.2 hidden notice

https://github.com/WordPress/WordPress/blob/master/wp-includes/functions.php#L650
This line gives an notice. it is silenced but it’s there.

Creation of dynamic property FS_User::$is_beta is deprecated

To see it I use this function:

add_action( 'admin_notices', function () {
    $error = error_get_last();
    if ( ! empty( error_get_last() ) ) {
        echo '<div class="notice notice-info is-dismissible" title="' . __FILE__ . '"><p>';
        var_dump ( $error);
        echo '</p></div>';
    }
} );

I’m seeing this on an existing client site. I have no idea if specific settings are required. But because of the data in the option “fs_accounts”.

Can you take a look?

Let me know if I can help

Jan-Willem