1--TEST--
2Bug #71539.4 (Memory error on $arr[$a] =& $arr[$b] if RHS rehashes)
3--FILE--
4<?php
5$array = [0=>[]];
6$array[0][0] =& $array[0][''];
7$array[0][0] = 42;
8var_dump($array);
9?>
10--EXPECT--
11array(1) {
12 [0]=>
13 array(2) {
14 [""]=>
15 &int(42)
16 [0]=>
17 &int(42)
18 }
19}
20
