Merge pull request #12734 from silicons/shoelaces

shoelaces. untying people's shoelaces. admin smite to untie someone's shoelaces. credit to shaps/tg.

code/game/atoms.dm

@@ -70,6 +70,9 @@
 	/// A luminescence-shifted value of the last color calculated for chatmessage overlays
 	var/chat_color_darkened
 
+	///Mobs that are currently do_after'ing this atom, to be cleared from on Destroy()
+	var/list/targeted_by
+
 /atom/New(loc, ...)
 	//atom creation method that preloads variables at creation
 	if(GLOB.use_preloader && (src.type == GLOB._preloader.target_path))//in case the instanciated atom is creating other atoms in New()
@@ -144,6 +147,11 @@
 	LAZYCLEARLIST(overlays)
 	LAZYCLEARLIST(priority_overlays)
 
+	for(var/i in targeted_by)
+		var/mob/M = i
+		LAZYREMOVE(M.do_afters, src)
+	targeted_by = null
+
 	QDEL_NULL(light)
 
 	return ..()