Misuse of current_user_can.

This plugin use current_user_can to test if a user has a specific role. As it is written here, this does not always work:
https://codex.www.ads-software.com/Function_Reference/current_user_can

Here is my fix:

function does_user_have_role($user, $role)
{
    $result = false;
    if ( $user != NULL )
    {
        $result = in_array( $role, (array) $user->roles );
    }
    return $result;
}

/*
 * Hide the admin bar based on the list of user roles
 */
function cab_hide_by_users(){
    $user = wp_get_current_user();
	$roles = cab_get_disabled_users();
	foreach($roles as $role)
    {
	if ( does_user_have_role($user, $role) )
        {
            cab_unshow_adminbar();
            add_action('admin_head', 'cab_unshow_options');
        }
    }
}

https://www.ads-software.com/extend/plugins/wp-custom-admin-bar/