xref: /PHP-8.1/ext/json/tests/bug77843.phpt (revision 5beba0b0) 
1--TEST--
2Bug #77843: Use after free with json serializer
3--FILE--
4<?php
5
6class X implements JsonSerializable {
7    public $prop = "value";
8    public function jsonSerialize(): mixed {
9        global $arr;
10        unset($arr[0]);
11        var_dump($this);
12        return $this;
13    }
14}
15
16$arr = [new X()];
17var_dump(json_encode([&$arr]));
18
19?>
20--EXPECT--
21object(X)#1 (1) {
22  ["prop"]=>
23  string(5) "value"
24}
25string(20) "[[{"prop":"value"}]]"
26