== test ==
tailRecursive fun test() : Int {
    try {
        // do nothing
    } finally {
        test()
    }
}
---------------------
{ // do nothing }                              !<v1>: *                                                                     
test()                                         <v0>: *    NEW: call(test(), test) -> <v0>                                   
{ test() }                                     <v0>: *    COPY                                                              
try { // do nothing } finally { test() }       <v2>: *    NEW: merge(try { // do nothing } finally { test() }|!<v1>) -> <v2>
{ try { // do nothing } finally { test() } }   <v2>: *    COPY                                                              
=====================