1--TEST--
2Bug #79947: Memory leak on invalid offset type in compound assignment
3--FILE--
4<?php
5$array = [];
6$key = [];
7$array[$key] += [$key];
8var_dump($array);
9?>
10--EXPECTF--
11Warning: Illegal offset type in %s on line %d
12array(0) {
13}
14
