"Undo" of the case above removes the whole larger outer deconstruct (IE, the only one that makes sense), but leaves the inner, doubled deconstruct as a deconstruct.

Another "Undo" results in the (extremely helpful!) dialog of "you're gonna undo something completely unrelated". This seems pretty ...

But for your case, it's only giving two X's if you do ctrl-x twice?

That's correct. Ground can be marked multiple times (not just twice!) with ctrl-x - though only two red Xs will ever show. For example, If you have 75 construction robots, but use ctrl-x three times on 25 landfill, this will also ...

Ah, and alt-d doesn't trigger this bug! Presumably because alt-d is simply "murder all that's here", whereas ctrl-x is "tell me something about what's here so I can stamp it somewhere else".

Edit: Nor does a deconstruction planner with landfill selected.

Unrelated, but thank you for teaching me alt-d. I've been doing ctrl+x + esc for years now, because I didn't know there was a simple "Just murder these things". It's going to take a while to reprogram the muscle memory though.

Relatedly: I suspect the space platform case is the same root cause ...

Cross-posted to https://www.reddit.com/r/factorio/comments/1hb03p2/be_careful_deconstructing_alreadymarked_landfill/

Reproduction steps


Grab 25 personal construction robots and go somewhere over water, where only personal robots are active. Ensure your personal roboports are switched off, to ...

Ah, I ran into this issue today as well!

In my particular case, I was able to resolve it by hand-mining a single piece of coal.

Indeed, when I got back to playing, that's the save I continued to play from! Anecdotally, my autosaves are on the order of a fraction of a second, currently.

Unfortunately, I have been unable to reproduce the problem. I've attempted to do so by waiting at each step for an autosave to kick in as ...

I placed a blueprint that uses wooden power poles -- but I didn't have any wooden power poles on me, and wished to place medium power poles instead. I selected a red deconstruction blueprint (a redprint?), to delete only the ghost tiles of the wooden power poles. What follows is a fallible ...