== foo ==
fun foo() {
    var x: String
    class A {
        init {
            x = ""
        }
    }
    x.length
}
---------------------
L0:
  1 <START>                                                         INIT: in: {} out: {}              USE: in: {} out: {}
  2 mark({ var x: String class A { init { x = "" } } x.length })
    v(var x: String)                                                INIT: in: {} out: {x=D}
    jmp?(L2)                                                        INIT: in: {x=D} out: {x=D}        USE: in: {x=READ} out: {x=READ}
  3 mark({ x = "" })
    mark("")
    r("") -> <v0>                                                                                     USE: in: {x=WRITTEN_AFTER_READ} out: {x=WRITTEN_AFTER_READ}
    w(x|<v0>)                                                       INIT: in: {x=D} out: {x=ID}       USE: in: {x=READ} out: {x=WRITTEN_AFTER_READ}
L2 [after local class]:
  2 mark(x.length)                                                  INIT: in: {x=I?D} out: {x=I?D}    USE: in: {x=READ} out: {x=READ}
    r(x) -> <v2>                                                                                      USE: in: {} out: {x=READ}
    r(length|<v2>) -> <v3>
L1:
  1 <END>                                                           INIT: in: {} out: {}
error:
    <ERROR>
sink:
    <SINK>                                                                                            USE: in: {} out: {}
=====================