I've got a question about interop between Kotlin a...

# multiplatform

[audax]

I've got a question about interop between Kotlin and Java, which live in different gradle modules.
In the shared module I've got:

import kotlin.jvm.JvmStatic

data class ExampleThingy(
    val items: List<ItemThingy>,
) {
    companion object {
        @JvmStatic
        val EXAMPLE = ExampleThingy(
            items = listOf(
                ItemThingy("1"),
                ItemThingy("2"),
            )
        )
    }
}

data class ItemThingy(
    val id: String
)

In the java module, which imports the shared module, I have the following code:

var exampleList = ExampleThingy.getEXAMPLE().getItems();
var thingy = new ExampleThingy(exampleList);

This compiles without warnings, but the IDE shows an error:
Unknown class: 'java.util.List<com.example.demo_kmp_java.ItemThingy>'
There I can't get any IDE assistance in the Java Code.

Why does this happen and can I fix it? Sadly I have to work with the strict rule of "no Kotlin in the backend, not even a single file", but of course my backend needs to access stuff from my shared module.

[audax]

Now I've been stripping my example code from everything that is not relevant and the error disappeared again. So this is probably an IDE bug 😞

[audax]

The bug only surfaces in K2 mode.

[audax]

My workaround: When working in Java, I disable K2 and whenever I work in Kotlin, I enable it.