"Type object cannot be called as a class" after reflection assertion

[dbrekelmans]

I'm using Reflection to assert that a method exists on an object.
Therefor it should be completely safe to call the method on this object dynamically.

https://psalm.dev/r/6e92bd1315

Expected result
No error

Actual result
ERROR: UndefinedClass - 26:20 - Type object cannot be called as a class

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/6e92bd1315

<?php

use ReflectionException;
use ReflectionMethod;
use RuntimeException;

use function get_class;
use function sprintf;

final class MethodExtractor
{
    /** @return mixed */
    public function extract(object $source, string $data)
    {
        try {
            $reflectionMethod = new ReflectionMethod(get_class($source), $data);
        } catch (ReflectionException $e) {
            throw new RuntimeException(sprintf('Method "%s" does not exist.', $data));
        }

        if (!$reflectionMethod->isPublic()) {
            throw new RuntimeException(sprintf('Method "%s" is not public.', $data));
        }

        if ($reflectionMethod->isStatic()) {
            return $source::$data();
        }

        return $source->$data();
    }
}

Psalm output (using commit 3106635):

ERROR: UndefinedClass - 26:20 - Type object cannot be called as a class

INFO: MixedMethodCall - 29:25 - Cannot determine the type of $source