Hello, I'm having a base class like this:

abstract class Scene : JavaScene() { // JavaScene is a Java class
    private var composition: Composition? = null

    fun setContent(content: @Composable () -> Unit) {
        composition = Composition(/* ... */).apply { setContent(content) }
    }
}

and a subclass like this:

class MyScene : Scene() {
    override fun init() { // From JavaScene
        setContent { /* ... */ }
    }
}

Nothing complains during the compile time, but at the runtime when

init

gets called,

Scene.setContent

throws an error:

androidx.compose.runtime.internal.ComposableLambdaImpl cannot be cast to kotlin.jvm.functions.Function0

. How to fix that?

Not sure why this happens, but did you try to not pass

content

lambda directly, but instead call it?

fun setContent(content: @Composable () -> Unit) {
    composition = Composition(/* ... */).apply { setContent { content() } }
}

Same error :(

Honestly is this a java interop issue?

Could be 🤷 Never has to work with Java & Compose 😕

Maybe derived class from java has different behavior during the compile time, and compose don't get it.