Factorio Forums

What did I do
Maintaining a copper mining and smelting area with personal drones.
The area had a lot of electric furnace, blue belt ghosts, red belts marked for upgrade, some miners marked for removal, and some miners marked to have efficiency I modules inserted into them.
The smelting area was completed, then I moved to the mining area.

On my way there, I've disabled personal drones while passing by the uranium mining/processing area, then reenabled them once I arrived.


What happened
The game froze for a second then crashed while the drones were working and I was idling.


What did I expect
Drones completing the work orders without the game crashing.


Frequency
I was able to replicate it once by loading the attached autosave, picking up blue belts, heading to the copper mining area, disabling personal drones on the way, then enabling them once I arrived.
Resulted in the same crash after a short while of the drones working, with the same error in the log.
Couldn't replicate it again, even with the same setup.

Thanks for the report. This is now fixed for the next release.

Thank you!