Empty files leads to infinite fetching during sync process

[untitaker]

This has the same root cause as #187

I wonder whether we should introduce a node type, with methods that do the rigorous checking for us. Currently the code of sync.js is littered with typeof-checks, unfortunately only partially.

[raucao]

Good idea.

[untitaker]

Where would I define such a type?

[raucao]

It's a fairly complex topic, as you also have to implement it with the caching in mind.

[untitaker]

It would only replace the {...} construction I see in makeNode. It's not even a real design change?

[raucao]

Oh, ok. Haven't looked into it specifically. Just explore on your own.

[raucao]

Sorry for the closing/re-opening dance. I still saw this in an older 2.0.0-beta, but not in the latest one. And I have added proper handling of empty documents to #1331, which fixes the remaining issues with them.