A modern programming language that makes developers happier.

kotlinlang

On Jenkins we have a the following warning with Kotlin 1.2. I cannot reproduce the issue locally and I have no idea where this warning is coming from. Does anybody have an idea? This warning appears in `java-library` and Android modules
```
04:17:28 w: The '-d' option with a directory destination is ignored because '-Xbuild-file' is specified
04:17:28 e: warnings found and -Werror specified
04:17:28 :libs:rx-helper:library:compileDebugKotlin FAILED
```