== foo ==
fun foo(a: Array<Int>) {
    a[1] = 2
}
---------------------
L0:
  1 <START>
    v(a: Array<Int>)
    magic[FAKE_INITIALIZER](a: Array<Int>) -> <v0>
    w(a|<v0>)
  2 mark({ a[1] = 2 })
    mark(a[1])
    r(a) -> <v1>
    r(1) -> <v2>
    r(2) -> <v3>
    call(a[1] = 2, set|<v1>, <v2>, <v3>) -> <v4>
L1:
  1 <END>                                             NEXT:[<SINK>]
error:
    <ERROR>                                           PREV:[]
sink:
    <SINK>                                            PREV:[<ERROR>, <END>]
=====================