--TEST--
Bug #72508 (strange references after recursive function call and "switch" statement)
--FILE--
<?php
function a ($option) {
    b($option['bla']);
    c($option);
    var_dump($option);
}
function b (&$string) {
    $string = 'changed';
}
function c ($option) {
    switch ($option['bla']) {
    default:
        $copy = $option;
        $copy['bla'] = 'copy';
        break;
    }
}
a(array('bla' => 'fasel'));

?>
--EXPECT--
array(1) {
  ["bla"]=>
  string(7) "changed"
}