It's a world that I spent most of my hours in factorio in and I have everything set up to launch a rocket but have not yet done so because I'm trying to unlock as much achievements that I still can since I want to go modded after launching the rocket.
So the last thing I was doing was setting up another advanced circuit line and modifying my blueprints and then when autosave happened this error showed up:
I panicked after seeing that and did exactly what it said: Saved to a new file, quit the game, and prepared myself a factorio forums account (which i previously did not have) and made this post.
Tried starting up the game again and loaded the new save file but it crashed the game. I have not yet tried loading the previous autosaves.
Attached with the post is the save file as requested by the game and the crash log.
If it helps, I'm running the Steam version of Factorio on 0.15.37 and I'm on Windows 10 [Version 10.0.16299.64] 64-bit with 16GB of RAM and a dual-monitor setup.
I can't really fix it unless I know the origin of the corruption and for that I would need to be able to reproduce it. It could even be entirely random. Did it happen to you again? I hope not 