Reference to src being replaced when ChangeTurf() is called

[SteelSlayer]

Posted this on discord but posting again here so it won't get lost as easily.

Given a list which currently contains a reference to the src floor: whenever /turf/proc/ChangeTurf is called, it qdeletes the src floor and creates a new plating.

Somehow, during the newing of the plating, the reference to the src floor in the list gets replaced with the plating. I have no idea whats going on here. I see no code that should do this, so I'm guessing its some behind the scenes Byond stuff.

Gif for a visual explanation:

I haven't modified any existing turf related code on my branch, and in fact, this issue happens on master as well with no code additions.

[farie82]

http://www.byond.com/docs/ref/#/turf
There it suggests that if you new a turf with as param the old one that it will replace the old one.

Turfs cannot be moved. They can only be created or destroyed by changing world.maxx, world.maxy, or world.maxz. When you create a new turf with new(), it always replaces the old one.

You also can't move or new/delete them normally. So it makes sense that byond will reuse the reference

[Fox-McCloud]

What @farie82 said is correct. You can't really "delete" a turf, per se, only replace an instance of it; this is why calling del on a turf isn't really that much more expensive than qdel.

Areas, IIRC, function pretty much the exact same way.

[SteelSlayer]

Yep, that checks out, thanks guys.