Could not get class storage for Traversable.

[3lvir4]

I was running psalm on a project after modifying some apis to return intersection types with traversable and got an error of the form:
Uncaught InvalidArgumentException: Could not get class storage for traversable in blablabla.

Maybe it is normal, I don't know. I find it strange since it is exactly one of the advertised usecases of this php feature.

I reproduced it here:
https://psalm.dev/r/17aef64aef

Is this a bug or something I missed ?

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/17aef64aef

<?php

use Traversable;

interface HasMap {
	function map(callable $fun): mixed;
}

function foo(): Traversable&HasMap {
	// something
}

Psalm encountered an internal error:

/vendor/vimeo/psalm/src/Psalm/Internal/Provider/ClassLikeStorageProvider.php: Could not get class storage for traversable

[weirdan]

Duplicate of #7520