Error while running event Kux-SlimInserters::script_raised_revive (ID 81)
Kux-SlimInserters/lib/Entity.lua:535: attempt to index global 'surface' (a nil value)
stack traceback:
Kux-SlimInserters/lib/Entity.lua:535: in function <Kux-SlimInserters/lib/Entity.lua:517>
(...tail calls...)
Kux-SlimInserters/events/on_built_entity.lua:62: in function <Kux-SlimInserters/events/on_built_entity.lua:8>
stack traceback:
[C]: in function 'revive'
creative-mod/scripts/util.lua:229: in function 'revive_entity_ghost_and_raise_event'
creative-mod/scripts/cheats.lua:2658: in function 'tick'
creative-mod/scripts/events.lua:297: in function <creative-mod/scripts/events.lua:259>

OK, I've found the reason for the exception in a piece of code of a case which is not yet implemented.

What exactly did you do before the crash?

I placed a slim inserter over another slim inserter and then did it again. The game crashed.

hmm, strange, I have already tested this several times and always do it myself.
There must be a difference, because I see that the Creative Mod triggers an event.

crash is fixed, but I still do not know why the Creative Mod triggers the event.

crash is fixed, but I still do not know why the Creative Mod triggers the event.

I apologize, but I don't think this issue has been fixed yet, as I tested it and the game still crashed in the same way.
Furthermore, I believe I have identified the connection between this crash and the Creative Mod. I had Instant Blueprint enabled, which means I didn't have slim inserters in my inventory; I got them for free through cheating. Then, when I placed them twice, the crash occurred.

Thanks for the investigation, it helps me a lot to implement the support for Creative Mod.