void AppCacheGroup::HostDestructionImminent(AppCacheHost* host) {
  queued_updates_.erase(host);
  if (queued_updates_.empty() && !restart_update_task_.IsCancelled())
    restart_update_task_.Cancel();
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.