Fixes deconstructing walls causing runtimes

code/game/mecha/equipment/tools/mining_tools.dm

@@ -65,17 +65,20 @@
 /turf/closed/wall/drill_act(obj/item/mecha_parts/mecha_equipment/drill/drill)
 	while(drill.do_after_mecha(src, 15 / drill.drill_level))
 		drill.log_message("Drilled through [src]", LOG_MECHA)
-		alter_integrity(-drill.wall_decon_damage)
 		drill.occupant_message("<span class='notice'>You drill through some of the outer plating...</span>")
 		playsound(src,'sound/weapons/drill.ogg',60,TRUE)
+		if(!alter_integrity(-drill.wall_decon_damage))
+			return TRUE
 
 /turf/closed/wall/r_wall/drill_act(obj/item/mecha_parts/mecha_equipment/drill/drill)
 	if(drill.drill_level >= DRILL_HARDENED)
 		while(drill.do_after_mecha(src, 20 / drill.drill_level))
 			drill.log_message("Drilled through [src]", LOG_MECHA)
-			alter_integrity(-drill.wall_decon_damage)
 			drill.occupant_message("<span class='notice'>You drill through some of the outer plating...</span>")
 			playsound(src,'sound/weapons/drill.ogg',60,TRUE)
+			if(!alter_integrity(-drill.wall_decon_damage))
+				return TRUE
+
 	else
 		drill.occupant_message("<span class='danger'>[src] is too durable to drill through.</span>")
 

code/game/objects/items.dm

@@ -957,6 +957,9 @@ GLOBAL_VAR_INIT(embedpocalypse, FALSE) // if true, all items will be able to emb
 
 /// Called when a mob tries to use the item as a tool.Handles most checks.
 /obj/item/proc/use_tool(atom/target, mob/living/user, delay, amount=0, volume=0, datum/callback/extra_checks)
+	// we have no target, why are we even doing this?
+	if(isnull(target))
+		return
 	// No delay means there is no start message, and no reason to call tool_start_check before use_tool.
 	// Run the start check here so we wouldn't have to call it manually.
 	if(!delay && !tool_start_check(user, amount))

code/game/turfs/closed/_closed.dm

@@ -227,6 +227,8 @@
 	return ..()
 
 /turf/closed/proc/attack_override(obj/item/W, mob/user, turf/loc)
+	if(!isclosedturf(src))
+		return
 	//the istype cascade has been spread among various procs for easy overriding or if we want to call something specific
 	if(try_decon(W, user, loc) || try_destroy(W, user, loc))
 		return
@@ -252,15 +254,18 @@
 	return TRUE
 
 /turf/closed/proc/try_decon(obj/item/I, mob/user, turf/T)
+	var/act_duration = breakdown_duration
 	if(I.tool_behaviour == TOOL_WELDER)
 		if(!I.tool_start_check(user, amount=0))
 			return FALSE
-
 		to_chat(user, "<span class='notice'>You begin slicing through the outer plating...</span>")
-		while(I.use_tool(src, user, breakdown_duration, volume=50))
+		while(I.use_tool(src, user, act_duration, volume=50))
 			if(iswallturf(src))
 				to_chat(user, "<span class='notice'>You slice through some of the outer plating...</span>")
-				alter_integrity(-(I.wall_decon_damage),user,FALSE,TRUE)
+				if(!alter_integrity(-(I.wall_decon_damage),user,FALSE,TRUE))
+					return TRUE
+			else
+				break
 
 	return FALSE
 

code/game/turfs/closed/minerals.dm

@@ -79,16 +79,20 @@
 	return ..()
 
 /turf/closed/mineral/try_decon(obj/item/I, mob/user, turf/T)
+	var/act_duration = breakdown_duration
 	if(I.tool_behaviour == TOOL_MINING)
 		if(!I.tool_start_check(user, amount=0))
 			return FALSE
 
 		to_chat(user, "<span class='notice'>You begin breaking through the rock...</span>")
-		while(I.use_tool(src, user, breakdown_duration, volume=50))
+		while(I.use_tool(src, user, act_duration, volume=50))
 			if(ismineralturf(src))
 				to_chat(user, "<span class='notice'>You break through some of the stone...</span>")
 				SSblackbox.record_feedback("tally", "pick_used_mining", 1, I.type)
-				alter_integrity(-(I.wall_decon_damage),user,FALSE,TRUE)
+				if(!alter_integrity(-(I.wall_decon_damage),user,FALSE,TRUE))
+					return TRUE
+			else
+				break
 
 	return FALSE
 

code/game/turfs/closed/wall/reinf_walls.dm

@@ -78,7 +78,8 @@
 		to_chat(user, "<span class='notice'>You begin slicing through the [src].</span>")
 		while(W.use_tool(src,user,30,volume = 100))
 			to_chat(user, "<span class='notice'>You slice through some of the outer plating...</span>")
-			alter_integrity(-(W.wall_decon_damage))
+			if(!alter_integrity(-(W.wall_decon_damage)))
+				return TRUE
 		return 1
 
 	switch(d_state)

code/game/turfs/closed/walls.dm

@@ -85,9 +85,10 @@
 	return null
 
 /turf/closed/wall/attack_override(obj/item/W, mob/user, turf/loc)
-	if(try_clean(W, user, loc) || try_wallmount(W, user, loc))
+	if(!iswallturf(src))
+		return
+	if(try_clean(W, user, loc) || try_wallmount(W, user, loc) || try_decon(W, user, loc) || try_destroy(W, user, loc))
 		return
-	..()
 
 /turf/closed/wall/proc/try_clean(obj/item/W, mob/user, turf/T)
 	if((user.a_intent != INTENT_HELP))
@@ -122,19 +123,6 @@
 
 	return FALSE
 
-/turf/closed/wall/try_decon(obj/item/I, mob/user, turf/T)
-	if(I.tool_behaviour == TOOL_WELDER)
-		if(!I.tool_start_check(user, amount=0))
-			return FALSE
-
-		to_chat(user, "<span class='notice'>You begin slicing through the outer plating...</span>")
-		while(I.use_tool(src, user, breakdown_duration, volume=50))
-			if(iswallturf(src))
-				to_chat(user, "<span class='notice'>You slice through some of the outer plating...</span>")
-				alter_integrity(-(I.wall_decon_damage),FALSE,TRUE)
-
-	return FALSE
-
 /turf/closed/wall/singularity_pull(S, current_size)
 	..()
 	wall_singularity_pull(current_size)