PublicVisibility mutator failing due to missing reflection

[theofidry]

Question	Answer
Infection version	0.10.5 (as a Composer package)
Test Framework version	PHPUnit 7.4.0
PHP version	PHP 7.2.2 (cli)
Platform	OSX Sierra
Github Repo	humbug/php-scoper#265

Complete output

$ php fixtures/set020-infection/vendor/infection/infection/bin/infection --coverage=dist/infection-coverage
You are running Infection with xdebug enabled.
    ____      ____          __  _
   /  _/___  / __/__  _____/ /_(_)___  ____
   / // __ \/ /_/ _ \/ ___/ __/ / __ \/ __ \
 _/ // / / / __/  __/ /__/ /_/ / /_/ / / / /
/___/_/ /_/_/  \___/\___/\__/_/\____/_/ /_/

Running initial test suite...

PHPUnit version: 7.4.0

  723 [============================] 4 secsProcessing source code files:  0/44

Generate mutants...

Processing source code files:  8/44
In InvalidMutatorException.php line 21:

  Encountered an error with the "PublicVisibility" mutator in the "/Users/tfidry/Project/Humbug/php-scoper/src/functions.php" file. This is most likely a bug in Infection, so please report this in our
  issue tracker.


In PublicVisibility.php line 103:

  Call to a member function getInterfaces() on null


run [--test-framework TEST-FRAMEWORK] [--test-framework-options TEST-FRAMEWORK-OPTIONS] [-j|--threads THREADS] [--only-covered] [-s|--show-mutations] [-c|--configuration CONFIGURATION] [--coverage COVERAGE] [--mutators MUTATORS] [--filter FILTER] [--formatter FORMATTER] [--min-msi MIN-MSI] [--min-covered-msi MIN-COVERED-MSI] [--log-verbosity LOG-VERBOSITY] [--initial-tests-php-options INITIAL-TESTS-PHP-OPTIONS] [--ignore-msi-with-no-mutations] [--debug]

The issue seems to be caused by that following piece of code:

// src/functions.php from humbug/php-scoper

function create_scoper(): Scoper
{
    return (new class() extends ApplicationFactory {
        public static function createScoper(): Scoper
        {
            return parent::createScoper();
        }
    })::createScoper();
}