I was removing trees off an ore patch when this popped up.
0.001 2019-03-12 07:09:58; Factorio 0.17.11 (build 43576, win64, steam)
0.001 Operating system: Windows 10 (version 1803)
168.350 Error MainLoop.cpp:1127: Exception at tick 210310: The mod Autobuild caused a non-recoverable error.
Please report this error to the mod author.
Error while running event autobuild::on_nth_tick(10)
invalid key to 'next'
stack traceback:
[C]: in function 'next'
autobuild/control.lua:229: in function 'player_autobuild'
autobuild/control.lua:254: in function 'handle_player_update'
autobuild/control.lua:259: in function <autobuild/control.lua:257>