Description:
------------
It appears adding a strict types declaration makes PHPDBG drop all what it's doing and stop. E.g. consider this example without strict types:

$ cat example.php 
<?php
echo "OK!\n";
$ cat example.php | phpdbg -qrrs=
OK!
And now the same example with strict types:

$ cat example2.php 
<?php
declare(strict_types=1);
echo "OK!\n";
$ cat example2.php | phpdbg -qrrs=
[Nothing to execute!]


$ phpdbg --version
phpdbg 0.5.0 (built: Aug  7 2019 09:50:45)
PHP 7.3.8-1, Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.8, Copyright (c) 1998-2018 Zend Technologies
    with Zend OPcache v7.3.8-1, Copyright (c) 1999-2018, by Zend Technologies
    with Xdebug v2.7.0RC2, Copyright (c) 2002-2019, by Derick Rethans

I've seen the same issue in PHP 7.4-beta.


Test script:
---------------
<?php
declare(strict_types=1);
echo "OK!\n";

Expected result:
----------------
OK!

Actual result:
--------------
[Nothing to execute!]