/**
     * Call error handler for undefined method
     *
     * @param string $name unknown method-name
     * @param array  $args argument array
     *
     * @return mixed
     * @throws SmartyException
     */
    public function __call($name, $args)
    {
        if (isset($this->class)) {
            throw new SmartyException("undefined extension class '{$this->class}'");
        } else {
            // Piwigo specifics - starts here
            // when updating from Piwigo 11 to 12, we try to delete compiled templates and there is a mix old and new Smarty files, resulting in a:
            // Fatal error: Uncaught --> Smarty: Smarty->_clearTemplateCache() undefined method
            // indeed this method does not exist in Smarty 3.1.29 (Piwigo 11) but exists in Smarty 3.1.39 (Piwigo 12)
            if ('_clearTemplateCache' == $name)
            {
                return;
            }
            // Piwigo specifics - stops here
            throw new SmartyException(get_class($args[ 0 ]) . "->{$name}() undefined method");
        }
    }
}

 Fatal error: Uncaught --> Smarty: undefined extension class 'Smarty_Internal_Runtime_Subtemplate' <-- thrown in /home3/tbalay/sites/kiki-et-domi/include/smarty/libs/sysplugins/smarty_internal_undefined.php on line 62

 Fatal error: Uncaught --> Smarty: Plugin 'smarty_modifier_nl2br' not callable <-- thrown in /home3/tbalay/sites/kiki-et-domi/include/smarty/libs/sysplugins/smarty_internal_template.php on line 468