Value classes break State class no zero argument constructor usage

[brentwatson]

A State class that contains a value class will fail with InstantiationException: java.lang.Class<...> has no zero argument constructor error.

Eg:

@JvmInline
value class MyValueClass(private val num: Int) {
    companion object {
        val Default: MyValueClass = MyValueClass(1)
    }
}

data class Temp(val x: String = "test", val y: MyValueClass = MyValueClass.Default): MavericksState

[brentwatson]

Looks like this might actually be a Kotlin Compiler bug. Looking at the bytecode, the default no-arg constructor actually isn't being generated in this case. I opened a ticket here: https://youtrack.jetbrains.com/issue/KT-64132

A workaround seems to be to simply wrap your value class type in another data class and use that in your State object