Re: "bad revision" fetch error when fetching missing objects from partial clones

> In practice I think it's an unlikely failure mode for a server you
> partial-cloned from to turn off filters, so it's probably not that
> important. I hit it because a test script used test_config to enable
> them, and then the follow-on test I added to run git-fetch got quite
> confused. A more likely scenario is that you might see it a
> misconfigured load-balanced pool of servers.
> 
> I do wonder how hitting a third-party server should work, though. E.g.,
> I partial clone from A, and then ask B to fetch some related history
> built on top. Do I tell B that I'm a partial clone and might be missing
> some objects? Or do I behave as normal, and expect to fault in objects
> that it assumes I have (e.g., a delta base)? And if the latter, does
> that work (if it does, then why doesn't the same logic kick in for this
> fetch?).
>