Test to outsmart smart casting

Test.kt

package il.co.kotlintlv.intro

var switch : Boolean = true

class Address(val street: String)
class Person {

    val age: Int
    val address: Address?
    get() {
        if(switch) {
            switch = false
            return field
        } else {
            switch = true
            return null
        }
    }
    
    constructor(age: Int, address: Address?) { // don't do this, use primary constructor
        this.age = age
        this.address = address
    }
}

fun main(args: Array<String>) {

    val address = Address("Ygal Alon")
    val person = Person(32, address)

    if(person.address != null) {
        print(person.address.street) // compile time error: Smart cast to 'Address' is impossible, because 'person.address' is a property that has open or custom getter 
    }
}