Removes stupid listlike var access code (#84648)

## About The Pull Request

[Removes all other listlike var
accesses](https://github.com/tgstation/tgstation/pull/84648/commits/4c5996b5c8b1da63740e8b4bf998b6cb6eadac33)

Also fucking dumpsters an unused proc that allowed for arbitrary
variable modifcation. Bad juju

This is undefined behavior and errors in later 515 versions. also it's
stupid as hell

code/__HELPERS/areas.dm

@@ -148,7 +148,7 @@ GLOBAL_LIST_INIT(typecache_powerfailure_safe_areas, typecacheof(list(
 	 * A list of all machinery tied to an area along with the area itself. key=area name,value=list(area,list of machinery)
 	 * we use this to keep track of what areas are affected by the blueprints & what machinery of these areas needs to be reconfigured accordingly
 	 */
-	var/area/affected_areas = list()
+	var/list/area/affected_areas = list()
 	for(var/turf/the_turf as anything in turfs)
 		var/area/old_area = the_turf.loc
 

code/__HELPERS/paths/path.dm

@@ -370,7 +370,7 @@ GLOBAL_LIST_INIT(can_pass_info_vars, GLOBAL_PROC_REF(can_pass_check_vars))
 
 /datum/can_pass_info/proc/compare_against(datum/can_pass_info/check_against)
 	for(var/comparable_var in GLOB.can_pass_info_vars)
-		if(!(vars[comparable_var] ~= check_against[comparable_var]))
+		if(!(vars[comparable_var] ~= check_against.vars[comparable_var]))
 			return FALSE
 	if(!pulling_info != !check_against.pulling_info)
 		return FALSE

code/__HELPERS/records.dm

@@ -1,6 +0,0 @@
-
-/proc/overwrite_field_if_available(datum/record/base, datum/record/other, field_name)
-	if(other[field_name])
-		base[field_name] = other[field_name]
-
-

code/controllers/subsystem/research.dm

@@ -7,7 +7,7 @@ SUBSYSTEM_DEF(research)
 	//TECHWEB STATIC
 	var/list/techweb_nodes = list() //associative id = node datum
 	var/list/techweb_designs = list() //associative id = node datum
-	var/list/datum/design/item_to_design = list() //typepath = list of design datums
+	var/list/list/datum/design/item_to_design = list() //typepath = list of design datums
 
 	///List of all techwebs, generating points or not.
 	///Autolathes, Mechfabs, and others all have shared techwebs, for example.

code/controllers/subsystem/spatial_gridmap.dm

@@ -234,7 +234,7 @@ SUBSYSTEM_DEF(spatial_grid)
 	. = list()
 
 	//technically THIS list only contains lists, but inside those lists are grid cell datums and we can go without a SINGLE var init if we do this
-	var/list/datum/spatial_grid_cell/grid_level = grids_by_z_level[center_turf.z]
+	var/list/list/datum/spatial_grid_cell/grid_level = grids_by_z_level[center_turf.z]
 
 	switch(type)
 		if(SPATIAL_GRID_CONTENTS_TYPE_CLIENTS)

code/datums/ai/_ai_controller.dm

@@ -176,7 +176,15 @@ multiple modular subtrees with behaviors
 	if(ai_status == AI_STATUS_OFF)
 		return
 
-	if(exited && (get_dist(pawn, (islist(exited) ? exited[1] : exited)) <= interesting_dist)) //is our target in between interesting cells?
+	var/distance = INFINITY
+	if(islist(exited))
+		var/list/exited_list = exited
+		distance = get_dist(pawn, exited_list[1])
+	else if(isatom(exited))
+		var/atom/exited_atom = exited
+		distance = get_dist(pawn, exited_atom)
+
+	if(distance <= interesting_dist) //is our target in between interesting cells?
 		return
 
 	if(should_idle())

code/datums/components/_component.dm

@@ -281,7 +281,8 @@
 	var/datum/component/C = dc[c_type]
 	if(C)
 		if(length(C))
-			C = C[1]
+			var/list/component_list = C
+			C = component_list[1]
 		if(C.type == c_type)
 			return C
 	return null

code/datums/greyscale/_greyscale_config.dm

@@ -278,8 +278,9 @@
 	for(var/datum/greyscale_layer/layer as anything in group)
 		var/icon/layer_icon
 		if(islist(layer))
+			var/list/layer_list = layer
 			layer_icon = GenerateLayerGroup(colors, layer, render_steps, new_icon || last_external_icon)
-			layer = layer[1] // When there are multiple layers in a group like this we use the first one's blend mode
+			layer = layer_list[1] // When there are multiple layers in a group like this we use the first one's blend mode
 		else
 			layer_icon = layer.Generate(colors, render_steps, new_icon || last_external_icon)
 

code/modules/admin/topic.dm

@@ -1413,7 +1413,7 @@
 			if(response.body == "[]")
 				dat += "<center><b>0 bans detected for [ckey]</b></center>"
 			else
-				bans = json_decode(response["body"])
+				bans = json_decode(response.body)
 
 				//Ignore bans from non-whitelisted sources, if a whitelist exists
 				var/list/valid_sources

code/modules/admin/view_variables/debug_variables.dm

@@ -3,11 +3,12 @@
 /proc/debug_variable(name, value, level, datum/owner, sanitize = TRUE, display_flags = NONE) //if D is a list, name will be index, and value will be assoc value.
 	if(owner)
 		if(islist(owner))
+			var/list/list_owner = owner
 			var/index = name
 			if (value)
-				name = owner[name] //name is really the index until this line
+				name = list_owner[name] //name is really the index until this line
 			else
-				value = owner[name]
+				value = list_owner[name]
 			. = "<li style='backgroundColor:white'>([VV_HREF_TARGET_1V(owner, VV_HK_LIST_EDIT, "E", index)]) ([VV_HREF_TARGET_1V(owner, VV_HK_LIST_CHANGE, "C", index)]) ([VV_HREF_TARGET_1V(owner, VV_HK_LIST_REMOVE, "-", index)]) "
 		else
 			. = "<li style='backgroundColor:white'>([VV_HREF_TARGET_1V(owner, VV_HK_BASIC_EDIT, "E", name)]) ([VV_HREF_TARGET_1V(owner, VV_HK_BASIC_CHANGE, "C", name)]) ([VV_HREF_TARGET_1V(owner, VV_HK_BASIC_MASSEDIT, "M", name)]) "

code/modules/mapping/mapping_helpers.dm

@@ -1189,7 +1189,7 @@ INITIALIZE_IMMEDIATE(/obj/effect/mapping_helpers/no_atoms_ontop)
 	if(response.errored || response.status_code != 200)
 		query_in_progress = FALSE
 		CRASH("Failed to fetch mapped custom json from url [json_url], code: [response.status_code], error: [response.error]")
-	var/json_data = response["body"]
+	var/json_data = response.body
 	json_cache[json_url] = json_data
 	query_in_progress = FALSE
 	return json_data

code/modules/vehicles/_vehicle.dm

@@ -30,7 +30,7 @@
 	var/canmove = TRUE
 	var/list/autogrant_actions_passenger //plain list of typepaths
 	var/list/autogrant_actions_controller //assoc list "[bitflag]" = list(typepaths)
-	var/list/mob/occupant_actions //assoc list mob = list(type = action datum assigned to mob)
+	var/list/list/datum/action/occupant_actions //assoc list mob = list(type = action datum assigned to mob)
 	///This vehicle will follow us when we move (like atrailer duh)
 	var/obj/vehicle/trailer
 	var/are_legs_exposed = FALSE

code/modules/vehicles/mecha/mech_fabricator.dm

@@ -375,7 +375,7 @@
 
 	for(var/datum/design/design in cached_designs)
 		var/cost = list()
-		var/list/materials = design["materials"]
+		var/list/materials = design.materials
 		for(var/datum/material/mat in materials)
 			cost[mat.name] = OPTIMAL_COST(materials[mat] * component_coeff)
 

tgstation.dme

@@ -452,7 +452,6 @@
 #include "code\__HELPERS\radio.dm"
 #include "code\__HELPERS\randoms.dm"
 #include "code\__HELPERS\reagents.dm"
-#include "code\__HELPERS\records.dm"
 #include "code\__HELPERS\ref.dm"
 #include "code\__HELPERS\roundend.dm"
 #include "code\__HELPERS\sanitize_values.dm"