Bruce Weirdan comments

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                                            Bruce Weirdan

fix: Fix parsing of invalid intersection types

> Actually nevermind, it seems like there's a bug in the InArray assertion reconcile @danog Isn't it something you were fixing in #8773 (among other things)?

Psalm fails when processing more than 512 files when using intersection types

@joaojacome would you mind triggering the GHA build again? The logs have since expired.

Psalm fails when processing more than 512 files when using intersection types

Looking at those runs, beta (and only that version) does emit tons of `UndefinedClass` when there are more than 512 files.

Psalm fails when processing more than 512 files when using intersection types

And it's likely because it switched to multithreaded scan here: https://github.com/vimeo/psalm/blob/a157743140fdfd7004491f55a5e30232abd4847c/src/Psalm/Internal/Codebase/Scanner.php#L334-L352

Psalm fails when processing more than 512 files when using intersection types

> I'm assuming the fact that intersectUnionTypes checking if a class exists before it is loaded is a bug It certainly is. Even in a single-threaded scan, we may encounter...

[Help wanted] Listing PHP 8.1 features

This is pretty much done.

@psalm-internal namespace check confuses class name with a namespace

> or we find a way to disambiguate classes and namespaces with the current tag, which I'm not sure how to do. One option could be postfixes. E.g. `Some\NS\` (note...

`@immutable` on a singleton with a static method where a field populated makes Psalm crash

Simplified: https://psalm.dev/r/809ad5cc65

`@immutable` on a singleton with a static method where a field populated makes Psalm crash

Seems to happen only when unused code detection is turned on.

InvalidArgumentException + out of memory

`InvalidArgumentException` should have been fixed by #8817