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--TEST--
Tests that array unshift code is correctly dealing with copy on write and splitting on reference
--FILE--
<?php
$a=array();
$b=1;
$c=&$b;
array_unshift ($a,$b);
$b=2;
var_dump ($a);
?>
--EXPECT--
array(1) {
[0]=>
int(1)
}
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