annotation class Ann(val x: String)

fun foo(block: () -> Unit) = block.javaClass

fun box() {
    foo( @Ann("OK1") { })

    foo() @Ann("OK2") { }
}

//Ann(x = "OK1": kotlin.String) local final fun <anonymous>(): kotlin.Unit defined in box
//Ann(x = "OK2": kotlin.String) local final fun <anonymous>(): kotlin.Unit defined in box