The mod Automatic Underground Pipe Connectors (2.0.7) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event automatic-underground-pipe-connectors::on_object_destroyed (ID 174)
Inventory slot is not empty.
stack traceback:
[C]: in function 'newindex'
__automatic-underground-pipe-connectors/control.lua:203: in function 'process_built_entity'
automatic-underground-pipe-connectors/control.lua:267: in function <automatic-underground-pipe-connectors/control.lua:258>

I can't reproduce this, but I know what change is causing it. I'm rolling back the fix to a much less impactful bug. This should be fixed now.

If you happen to still be playing with 2.0.7 or earlier and can reproduce this reliably I'd appreciate more info

Will see if I can.