== A ==
class A {
    init {
        x = 1
    }
    val x: Int
}
---------------------
L0:
  1 <START>                                INIT: in: {} out: {}
  2 mark({ x = 1 })
    magic[IMPLICIT_RECEIVER](x) -> <v0>
    r(1) -> <v1>                                                           USE: in: {x=ONLY_WRITTEN_NEVER_READ} out: {x=ONLY_WRITTEN_NEVER_READ}
    w(x|<v0>, <v1>)                        INIT: in: {} out: {x=I}         USE: in: {} out: {x=ONLY_WRITTEN_NEVER_READ}
  1 v(val x: Int)                          INIT: in: {x=I} out: {x=ID}
L1:
    <END>                                  INIT: in: {x=ID} out: {x=ID}
error:
    <ERROR>                                INIT: in: {} out: {}
sink:
    <SINK>                                 INIT: in: {x=I?} out: {x=I?}    USE: in: {} out: {}
=====================