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--TEST--
Bug #77793: Segmentation fault in extract() when overwriting reference with itself
--FILE--
<?php
$str = 'foo';
$vars = ['var' => $str . 'bar'];
$var = &$vars['var'];
extract($vars);
var_dump($vars, $var);
?>
--EXPECT--
array(1) {
["var"]=>
&string(6) "foobar"
}
string(6) "foobar"
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