Description:
------------
I first noticed this in this test suite on travis running on the php7.4-snapshot that's available on Travis (I believe this is a nightly snapshot of the 7.4 branch):

https://travis-ci.org/diablomedia/zf1-controller/jobs/517348370

There are two tests that fail there due to `get_class` trying to operate on a boolean rather than on a class (these tests pass fine in all versions prior to 7.4).

Looking at the code a bit, I've been able to narrow the failure down to a simple script that I've added to the "Test script" section of this bug (also on 3v4l.org: https://3v4l.org/KZg3c).

In all versions prior to PHP 7.4, this will output `int(1)` in PHP 7.4 it outputs `bool(false)`.

Here's output from `php --version` in the docker container I was testing this on locally:

docker run -it --rm -v "$PWD":/usr/src/myapp -w /usr/src/myapp tommymuehle/docker-alpine-php-nightly php --version
PHP 8.0.0-dev (cli) (built: Feb 11 2019 05:57:53) ( NTS )
Copyright (c) The PHP Group
Zend Engine v4.0.0-dev, Copyright (c) Zend Technologies

(seems that container is on the php 8.0 branch (dev-master I assume), but based on the travis failures I'm fairly certain the same issue exists on the current php 7.4 snapshot as well)



Test script:
---------------
<?php

$array = [1,2,3];

$iterator = (new ArrayObject($array))->getIterator();

var_dump(current($iterator));

Expected result:
----------------
`int(1)`

Actual result:
--------------
`bool(false)`