== foo ==
fun foo(s: String) {
    s.
}
---------------------
L0:
  1 <START>
    v(s: String)
    magic(s: String) -> <v0>
    w(s|<v0>)
  2 mark({ s. })
    mark(s.)
    r(s) -> <v1>
    magic(s.|<v1>) -> <v2>
L1:
  1 <END>                       NEXT:[<SINK>]
error:
    <ERROR>                     PREV:[]
sink:
    <SINK>                      PREV:[<ERROR>, <END>]
=====================