Description:
------------
when declared strict_types=1, the type check for a callable's parameter is being bypassed.


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

declare(strict_types=1);

class IntArray
{
    public function __construct(array $initial = [])
    {
        array_walk($initial, function(int $value){}); // bypass strict_types
        foreach ($initial as $data) { $this->typeCheck($data); } // type checked as expected         
    }

    private function typeCheck(int $value)
    {
    }
}

$array = new IntArray(["12"]);

var_dump($array);

Expected result:
----------------
Fatal error: Uncaught TypeError: Argument 1 passed to {closure} must be of the type integer, string given, called in /var/tmp/x.php on line 8 and defined in /var/tmp/x.php:12
Stack trace:
#0 /var/tmp/x.php(8): {closure('12')}
#1 /var/tmp/x.php(17): IntArray->__construct(Array)
#2 {main}
  thrown in /var/tmp/x.php on line 12

Actual result:
--------------
Fatal error: Uncaught TypeError: Argument 1 passed to IntArray::typeCheck() must be of the type integer, string given, called in /var/tmp/x.php on line 9 and defined in /var/tmp/x.php:12
Stack trace:
#0 /var/tmp/x.php(9): IntArray->typeCheck('12')
#1 /var/tmp/x.php(17): IntArray->__construct(Array)
#2 {main}
  thrown in /var/tmp/x.php on line 12