== foo ==
fun Function0<Unit>.foo() {
    this()
}
---------------------
L0:
    <START>
    mark({ this() })
    mark(this())
    r(this)
    call(this, <for expression this>)
L1:
    <END>                                NEXT:[<SINK>]
error:
    <ERROR>                              PREV:[]
sink:
    <SINK>                               PREV:[<ERROR>, <END>]
=====================