False positive: Always throwing and returning never

[uuf6429]

Bug report

Given the following...

<?php

final class Url
{
	public function __clone(): never // <<
	{
		throw new \BadMethodCallException('Always throw');
	}
}

final class Email
{
	/**
	 * @return never
	 */
	public function __clone(): never
	{
		throw new \BadMethodCallException('Always throw');
	}
}

...PHPStan warns (on line 5) that a method that throws unconditionally should have the never return type (which it already does).

Originally, I had code returning void, but I never saw that warning in our code, it only showed up in the playground when I happened to paste my code for trying something else. Interestingly, the error identifier is phpstanPlayground.never. Also interesting that the PHPDoc one works.

Code snippet that reproduces the problem

https://phpstan.org/r/4670249c-9af0-4d1a-bcc2-c583c449dd46

Expected output

I didn't expect the error.

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Always :)

[staabm]

note: public function __clone(): never is a fatal error on PHP < 8.1

https://3v4l.org/2WDCe#veol