Bug report

<?php declare(strict_types = 1);

enum Button: int
{
	case On = 1;

	case Off = 0;
}

$value = 10;

var_dump(is_null($value = Button::tryFrom($value)));

After running the above code, the value of $value is null, but PHPStan reports "Call to function is_null() with null will always evaluate to false."

https://onlinephp.io/c/9d888d2d-344e-48bf-9a16-f3fc3f6dc111

Code snippet that reproduces the problem

https://phpstan.org/r/3332b922-4e1f-48b3-a83b-4ea9ac13a32a

Expected output

Call to function is_null() with null will always evaluate to true.

Did PHPStan help you today? Did it make you happy in any way?

No response