1--TEST--
2Overwriting a typed property that is not yet a reference
3--FILE--
4<?php
5
6class Test {
7    public ?Test $prop;
8}
9$s = <<<'STR'
10O:4:"Test":2:{s:4:"prop";N;s:4:"prop";O:4:"Test":1:{s:4:"prop";R:2;}}
11STR;
12var_dump(unserialize($s));
13
14?>
15--EXPECT--
16object(Test)#1 (1) {
17  ["prop"]=>
18  &object(Test)#2 (1) {
19    ["prop"]=>
20    *RECURSION*
21  }
22}
23