即使Constructor抛出Exception，PHP ReflectionClass也会调用Destructor

I'm getting a strange behavior with PHP 5.4 here. Suppose the following code:

class ExceptionDuringConstruction
{
    public function __construct() {
        echo '<br />construct before exception';
        throw new Exception('construction failed');
        echo '<br />construct after exception'; // unreachable, just checking
    }

    public function __destruct() {
        echo '<br />destruct';
    }
}

$reflection = new \ReflectionClass('ExceptionDuringConstruction');
$instance   = $reflection->newInstance();

The above code prints:

construct before exception
destruct

This can't be right, or am I missing something? If I'm doing the same thing using NEW, everything works like expected, no Destructor is called. To me, this looks like a bug - any opinions? Is this known (haven't found anything on it)?

PS: As this is my very first question here, but I'm reading for a long time - thank you for this great site! It's almost always like: Google > Stackoverflow > Solution wit great Explanation :-)