$callback = function ($type, $buffer) use ($event, $callable) {
if (0 !== $this->process->execute($callable, $callback)) {
$io = $event->getIO();
$event->getIO()->write(sprintf('<error>Script %s handling the %s event returned with an error: %s</script>', $callable, $event->getName(), $this->process->getErrorOutput()));
if ('err' === $type) {
$message = 'Script %s handling the %s event returned an error: %s';