[0.17.52] Crash while automatically saving

[Toboe]

I was playing with rails, but my game crashed while autosaving.
Attaching log and 2 autosaves: the one while game crashed and previous one.
As far sas I can remember I tried to right-click while game was autosaving.
Unfortunately I don't know how I forced the crash, also can't reproduce the situation.

EDIT: No mods, pure vanilla, creative game.