Description:
------------
Hello, 

This bug was tried on multiple Unix versions and multiple processors (32/64bits), and multiple PHP5 versions (including 5.2.0), so it seems really to be on the side of PHP.
After using a foreach with a referenced value, and then another foreach (without the referenced value), the original array is broken.
Apparently, the last value of the array takes the value of the n - 1 last value.

I've reduced the problem to its simplest form and attached it to this bug report.

Greeting, 

Ugo PARSI

Reproduce code:
---------------
<?php
$arr = array(1, 2, 3, 4);
foreach ($arr as &$value) {
   $value = $value * 2;
}
print_r($arr);
foreach ($arr as $value) {
   $value = $value;
}
print_r($arr);
?>

Expected result:
----------------
Array ( [0] => 2 [1] => 4 [2] => 6 [3] => 8 ) Array ( [0] => 2 [1] => 4 [2] => 6 [3] => 8 )

Actual result:
--------------
Array ( [0] => 2 [1] => 4 [2] => 6 [3] => 8 ) Array ( [0] => 2 [1] => 4 [2] => 6 [3] => 6 )