Both server and client crashed when, I think, bots tried to extract a module from an assembly plant with https://mods.factorio.com/mod/ModuleInserter
Here's a save that crashes on rejoin after that: http://file.sampo.ru/96nsf2/

2557.543 Error MainLoop.cpp:1195: Exception at tick 17228086: Мод Cursed Better Construction Robots вызвал неустранимую ошибку.
Пожалуйста, сообщите об этой ошибке автору мода.

Error while running event Cursed-BCR::on_robot_mined_entity (ID 64)
Cursed-BCR/control.lua:36: bad argument #1 of 2 to 'ipairs' (table expected, got nil)
stack traceback:
[C]: in function 'ipairs'
Cursed-BCR/control.lua:36: in function <Cursed-BCR/control.lua:26>

Thanks for report, fixed in the next update, sorry for delay, I don't received the notification.

*thumbs up*