Wow, the relationship between ktor and kotlinx-coroutines is really fragile. Just updated to beta 4 and was surprised that my server is now dead. Nothing in the logs, no responses to endpoints. Once I've noticed that I must also update kotlinx-coroutines from 1.0.0 to 1.0.1 everything worked again 😮

That is unfortunately true for beta release of ktor. We’ll be fixing it before release.