== foo ==
fun foo() {
    var a = 1
    use(a)
    a = 2
    use(a)
}
---------------------
1                                   <v0>   NEW()    
use                                 <v2>   NEW(<v1>)
a                                   <v1>   NEW()    
use(a)                              <v2>   COPY     
2                                   <v3>   NEW()    
use                                 <v5>   NEW(<v4>)
a                                   <v4>   NEW()    
use(a)                              <v5>   COPY     
{ var a = 1 use(a) a = 2 use(a) }   <v5>   COPY     
=====================
== bar ==
fun bar() {
    val b: Int
    b = 3
}
---------------------
3   <v0>   NEW()
=====================
== use ==
fun use(a: Int) = a
---------------------
a   <v1>   NEW()
=====================