Description:
------------
PHP 7.4.6

Following code throws "Typed property A::$x must not be accessed before initialization".

Expected behavior:
Method getX() returns null.

I cannot imagine any single usecase for this behavior and I consider it a serious bug leading back to PHP 7.0 hacks for nullable types in method signature.

Note: Omitting getter method is not acceptable since accessing non existing attribute does not throw error.

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

class A {
    private ?string $x;

    /**
     * @return string|null
     */
    public function getX(): ?string
    {
        return $this->x;
    }

    /**
     * @param string|null $x
     */
    public function setX(?string $x): void
    {
        $this->x = $x;
    }
}

$a = new A();

var_dump($a->getX());

Expected result:
----------------
Expected result is that var_dump prints null, not crash with fatal error

Actual result:
--------------
Fatal error:

Typed property A::$x must not be accessed before initialization