POLA Would Have Prevented the Event-Stream Incident (2018)

The code snippets appear to have been lost when this article was copied from its original location. There are links in their place which still appear to work, but the original (with inline snippets) is still available on archive.org: https://web.archive.org/web/20181204024622/https://medium.com/agoric/pola-would-have-prevented-the-event-stream-incident-45653ecbda99