== foo ==
fun foo() {
    int x = ()()
}
---------------------
int                <v0>: *   NEW: magic[UNRESOLVED_CALL](int) -> <v0>
= ()               <v1>: *   NEW: magic[UNRESOLVED_CALL](= ()) -> <v1>
= ()()             <v2>: *   NEW: magic[UNRESOLVED_CALL](= ()()|<v1>) -> <v2>
int x = ()()       <v3>: *   NEW: magic[UNRESOLVED_CALL](int x = ()()|<v0>, <v2>) -> <v3>
{ int x = ()() }   <v3>: *   COPY
=====================