Exception in thread "main" java.lang.NoClassDefFou...

# coroutines

[antonkeks]

Exception in thread "main" java.lang.NoClassDefFoundError: kotlin/jvm/internal/CoroutineImpl - sounds familiar?
Trying a few coroutine examples with kotlin 1.1-beta-38 and kotlinx-coroutines 0.8-beta
IDEA says there is a class kotlin.coroutines.experimental.jvm.internal.CoroutineImpl, is it a bug?