Description:
------------
When the same variable is 'used' by one closure by reference, and an another closure 'uses' the same variable by value several time, the variable value is corrupted.

This bub seems to be related to http://bugs.php.net/53958 which is closed since PHP 5.3.6.

Test script:
---------------
<?php

class asserter
{
	public function call($function) {}
}

$asserter = new asserter();

$closure = function() use ($asserter, & $function) { $asserter->call($function = uniqid()); };

try
{
	$closure();
}
catch (\exception $exception)
{
}

var_dump($function);

$function = 'md5';

$closure = function() use ($asserter, $function) { $asserter->call($function); };

try
{
	$closure();
}
catch (\exception $exception)
{
}

var_dump($function);

$closure = function() use ($asserter, $function) { $asserter->call($function); };

try
{
	$closure();
}
catch (\exception $exception) {}

var_dump($function);

?>

Expected result:
----------------
string(13) "4d89c1bc241ff"
string(3) "md5"
string(3) "md5"

Actual result:
--------------
string(13) "4d89c1bc241ff"
string(3) "md5"
string(3) �a"