This works for me on <https://try.kotlinlang.org/>...

# announcements

[jstuyts-squins]

This works for me on https://try.kotlinlang.org/ :

data class ArrayInDataClass(val x: ByteArray)

fun main(args: Array<String>) {
	println(ArrayInDataClass(byteArrayOf(3, 1, 4, 1, 5)))
}