Description:
------------
This is almost the exact same issue seen here: https://bugs.php.net/bug.php?id=71067

That bug got zapped, but I am still able to reproduce the same issue whenever I use `foreach()` by reference. The object remains cached in memory.

Test script:
---------------
<?php
class Example
{
    protected $property;

    public function __construct()
    {
        $test = (object) ['property' => 0];
        print_r($test); // Expecting `property=0`.

        foreach ($test as $_property => &$_value) {
            $this->{$_property} = &$_value;
            $this->{$_property} = 1;
        } unset($_value);
    }
}
new Example();
new Example();

Expected result:
----------------
stdClass Object
(
    [property] => 0
)
stdClass Object
(
    [property] => 0
)

Actual result:
--------------
stdClass Object
(
    [property] => 0
)
stdClass Object
(
    [property] => 1
)