Description:
------------
Using the die() function and passing a object as a parameter, you'd expect the __toString() function to be called, but it isn't. I understand there are problems with concatenation, but in this instance, just the object is being passed.

Reproduce code:
---------------
<?php
class Foobar {
    public function __toString() {
        return "Foo";
    }
}
$bar = new Foobar;
die($bar);
?>

Expected result:
----------------
Foo

Actual result:
--------------
Object id #1