Summary:
A17 R572 x64, playing a save from previous A17 builds. Manually saved the game, then clicked Return to Main Menu (in order to hopefully avoid a full crash), and was given the following assertion error CTD:
Assertion Failed: oid == -1 || objects_.find(oid) != objects_.end()(C:\rb\home\root\SH-OB0-BUILD\stonehearth\source\dm\store.cpp:572)
Here’s the save, if it’d be helpful. I sadly completely forgot to pull the dmp or log before reloading this time. 
@yshan since I raised it on the stream.