Extending DateTimeImmutable throws error on __unserialize parameter type

[othercorey]

When extending DateTimeImmutable, psalm throws an error that the parameter types for __unserialize() to not match DateTimeInterface.

I could not find any stubs defining this so assume the internal reflection is getting the wrong type?

https://psalm.dev/r/7d3e818a02

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/7d3e818a02

<?php

class MyDateTime extends DateTimeImmutable
{
}

Psalm output (using commit 7428e49):

ERROR: MethodSignatureMismatch - 3:7 - Argument 1 of DateTimeImmutable::__unserialize has wrong type 'mixed', expecting 'array<array-key, mixed>' as defined by DateTimeInterface::__unserialize

[othercorey]

dup of #8957

looks like the DateTimeInterface methods were added to callmap in 8.2