Tried a repro, and I think we got the same problem, especially the stack crawl.

Steps to repro:

1. Load big game on server (needs to be big? maybe, just for the timing)
2. Client connects
3. Start to save on client
4. Server quits before save finishes.
5. Client hangs and crashes.

The fam were playing 1.0.0 (cool!) and going for the "lazy" achievement. My machine was not the server. When the server started to save, I started saving, too. We have all the Angels and Bobs extensions stored but were playing stock this time (see the "achievement" item). During ...