Circular references

main.kt

fun main(args: Array<String>) {
    Inner().nodes()
    readLine()

    System.gc()
    
    readLine()
}

class Inner {
    fun nodes() {
        val first = Node()
        val second = Node()
        first.child = second
        second.child = first
    }
}

class Node {
    var child: Node? = null

    protected fun finalize() {
        println("${hashCode()} finalized")
    }
}