Methods returning void or never can not be mocked to throw an Exception

[mikey179]

Methods and functions with return type declaration void or never can not be mocked to throw an Exception:

class Example {
    public function store(string $something): void { ... }
}
$mock = NewInstance::of(Example::class)
$mock->returns(['store' => throws(new Exception('failure'))]);

InvalidArgumentException: Trying to map method Example::store(), but it is declared as returning void or never.

It should be possible to throw an exception from such a method, while providing a regular return value should still be forbidden.