Elevates InvalidIndexOperation pragma to an error. (#6653)

# About the pull request

Elevates InvalidIndexOperation to be an error in OD compile.

# Explain why it's good for the game


![image](https://github.com/cmss13-devs/cmss13/assets/41448081/91ee3ede-c268-493d-ab86-4da7bf5cf8aa)

---------

Co-authored-by: John Doe <[email protected]>

code/__pragmas.dm

@@ -21,6 +21,7 @@
 #pragma InvalidOverride error
 #pragma DanglingVarType error
 #pragma MissingInterpolatedExpression error
+#pragma InvalidIndexOperation error
 
 //3000-3999
 #pragma EmptyBlock error

code/datums/components/_component.dm

@@ -362,7 +362,8 @@
 	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/game/machinery/vending/cm_vending.dm

@@ -1307,7 +1307,8 @@ GLOBAL_LIST_INIT(cm_vending_gear_corresponding_types_list, list(
 		var/obj/item/item_ref = myprod[3]
 		var/priority = myprod[priority_index]
 		if(islist(item_ref)) // multi-vending
-			item_ref = item_ref[1]
+			var/list/ref_list = item_ref
+			item_ref = ref_list[1]
 
 		var/is_category = item_ref == null
 

code/modules/admin/view_variables/debug_variables.dm

@@ -4,11 +4,12 @@
 	var/header
 	if(D)
 		if(islist(D))
+			var/list/var_list = D
 			var/index = name
 			if (value)
-				name = D[name] //name is really the index until this line
+				name = var_list[name] //name is really the index until this line
 			else
-				value = D[name]
+				value = var_list[name]
 			header = "<li style='backgroundColor:white'>[VV_HREF_TARGET_1V(D, VV_HK_LIST_EDIT, "E", index)][VV_HREF_TARGET_1V(D, VV_HK_LIST_CHANGE, "C", index)][VV_HREF_TARGET_1V(D, VV_HK_LIST_REMOVE, "-", index)] "
 		else
 			header = "<li style='backgroundColor:white'>[VV_HREF_TARGET_1V(D, VV_HK_BASIC_EDIT, "E", name)][VV_HREF_TARGET_1V(D, VV_HK_BASIC_CHANGE, "C", name)][VV_HREF_TARGET_1V(D, VV_HK_BASIC_MASSEDIT, "M", name)] "

code/modules/paperwork/notepad.dm

@@ -118,6 +118,9 @@
 	else
 		to_chat(usr, SPAN_NOTICE("You need to hold it in your hands!"))
 
+/obj/item/notepad/proc/operator[](index_num)
+	return contents[index_num]
+
 /obj/item/notepad/verb/rename()
 	set name = "Rename notepad"
 	set category = "Object"

code/modules/paperwork/paper_bundle.dm

@@ -175,6 +175,9 @@
 	else
 		to_chat(usr, SPAN_NOTICE("You need to hold it in your hands!"))
 
+/obj/item/paper_bundle/proc/operator[](index_num)
+	return contents[index_num]
+
 /obj/item/paper_bundle/verb/rename()
 	set name = "Rename bundle"
 	set category = "Object"