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kotlinlang

In addition to my question, I see that gradle task ':copyMainKotlinClasses' is missing in 1.1.51

Hi. 

It's the intended change: in Gradle 4.0, separate classes directories were introduced (<https://docs.gradle.org/4.0/release-notes.html#multiple-class-directories-for-a-single-source-set>). Earlier, the classes from all the JVM languages that are used in the project were put into a single directory. With Gradle 4.0+, the previous behavior has been deprecated, each language now has its own separate classes directory, which is useful for incremental builds and caching.

Kotlin supports this starting with version 1.1.4 (<https://youtrack.jetbrains.com/issue/KT-18544>) , and the classes are by default placed in `build/classes/kotlin/&lt;sourceSetName&gt;`. Please consider using the new API and consume classes with `sourceSet.output.classesDirs` and do not expect the Kotlin classes to be put into the Java classes directory.

If you need to change to the deprecated behavior, you can use the opt-out flag described here: <https://youtrack.jetbrains.com/issue/KT-19774>