Description:
------------
I've found a realy strange bug .. Just look to the script and to the output! I've killed a half of our to understand what's going on in my script...

After iterating over array with a pointer variable the array becomes corrupted for next time iteration...

Look at the last element in foreach loop, it's the same with previous!!

Test script:
---------------
<?
	$sample = [
		[ "first", 1 ],
		[ "second", 2 ],
		[ "third", 3 ]
	];
	
	foreach ( $sample AS &$s )
	{
	}
	
	echo "Array: <pre>".print_r( $sample, 1 )."</pre><br/>";
	
	foreach ( $sample AS $s )
	{
		echo "Element: <pre>".print_r( $s, 1 )."</pre>";
	}
?>

Expected result:
----------------
Array:
Array
(
    [0] => Array
        (
            [0] => first
            [1] => 1
        )

    [1] => Array
        (
            [0] => second
            [1] => 2
        )

    [2] => Array
        (
            [0] => third
            [1] => 3
        )

)

Element:
Array
(
    [0] => first
    [1] => 1
)
Element:
Array
(
    [0] => second
    [1] => 2
)
Element:
Array
(
    [0] => third
    [1] => 3
)

Actual result:
--------------
Array:
Array
(
    [0] => Array
        (
            [0] => first
            [1] => 1
        )

    [1] => Array
        (
            [0] => second
            [1] => 2
        )

    [2] => Array
        (
            [0] => third
            [1] => 3
        )

)

Element:
Array
(
    [0] => first
    [1] => 1
)
Element:
Array
(
    [0] => second
    [1] => 2
)
Element:
Array
(
    [0] => second
    [1] => 2
)