Tried to locally save a multiplayer game during a Desync loop (which itself was fixed after restarting factorio server process).
It caused the following crash (reproducable):
[0.12.29][Steam][Windows] Crash on Save during Desync
Re: [0.12.29][Steam][Windows] Crash on Save during Desync
Hello thanks for the report, this has been solved in 0.12.30.