No output to the production directory since last update to 1.2.6 and IntelliJ CE 2018.2

Since the update to Kotlin 1.2.6 and the IntelliJ CE 2018.2 no output is generated to the out/production directory except for an empty directory with the project name.
I’ve tried to roll back to an earlier version of Kotlin but it does not help.

Has anyone similar problem? Working on macOS.

Thanks,
Jörg