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I'm having a very weird issue with the Ory Network Keto expand API where it is returning 502 Bad Gateway for results which are empty, what's up with that?

are you querying a tuple that does not exist?
or what do you mean by empty result?

I have a Namespace called "Role" that has a relation called "parents".
If I now expand the parents of an object that has parents, I get the expected result back.
If I attempt to query the parents of an object without parents, I get a Bad Gateway

Here, hp has dd as a parent, with dd having no parents

found the bug, what would you expect as a result?

should it be an error, or should it just echo what you requested?

hm for subject IDs it just echoes, so I assume it should do the same for sets

I'm not sure, but it shouldnt be a 5xx :v

feel free to comment on <https://github.com/ory/keto/pull/1139>

502 typically means panic, in this case because of nil pointer dereference