Test PHP7 crash with Drupal 8

test_php7_crash.php

<?php

function foo() {}

function bar() {}

function crash_merge($attached) {
  $merge = [ 'html_head' => ['2']];

  $attached = array_merge_recursive(
    $attached,
    $merge
  );

  print_r($attached);

  return $attached;
}

function crash_prepare() {
  $attachments2 = [ '#attached' => [ 'html_head' => ['0', '1']]];

  $attached = $attachments2['#attached'];
  unset($attached['html_head'][1]);
  return crash_merge($attached);
}

$dummy = str_repeat('-', 1024*1024*10);

$autoloader = require_once 'autoload.php';
$x = crash_prepare();