== foo ==
fun Function0<Unit>.foo() {
    this()
}
---------------------
L0:
  1 <START>
  2 mark({ this() })
    mark(this())
    call(this(), invoke|!<v0>) -> <v1>
L1:
  1 <END>                                 NEXT:[<SINK>]
error:
    <ERROR>                               PREV:[]
sink:
    <SINK>                                PREV:[<ERROR>, <END>]
=====================