Interface DefaultImpls classes are present in API files even though the interface is annotated with OptIn and the annotation excluded

[arkivanov]

Reproducer code:

@RequiresOptIn(level = RequiresOptIn.Level.ERROR)
@Retention(AnnotationRetention.BINARY)
annotation class InternalApi

@InternalApi
interface Foo {
    fun foo() {}
}

Also excludle InternalApi annotation using nonPublicMarkers config.

As expected, the Foo interface is not present in API files, but its DefaultImpls class is.

public final class com/arkivanov/mvikotlin/core/utils/Foo$DefaultImpls {
    public static fun foo (Lcom/arkivanov/mvikotlin/core/utils/Foo;)V
}

public abstract interface annotation class com/arkivanov/mvikotlin/core/utils/InternalApi : java/lang/annotation/Annotation {
}

Perhaps, DefaultImpls should be also excluded in this case?

[fzhinkin]

Thanks for reporting the issue. It actually seems to be a bug.