Cannot execute null.Add() and other similar list issues

ID:1731268
 
Dec 1 2014, 11:58 am (Edited on Dec 1 2014, 2:59 pm)
(See the best response by Mightymo.)
Hey guys. Lists have been acting strangely for me lately, specifically when I try to add, find, or remove something from/to them. They're considered 'null', even though I'm absolutely certain I'm defining them correctly. Care to shed some light?
Code:
var/list/squads = list()//The global list that houses all squads that have been created by players
//I've attempted adding some values to the list,
//such as var/list/squads = list("asd","dsa","DASD")
mob/var/InSquads = 0
mob/var/SquadsName = "None"


mob
 proc
  SquadsCheck()
   if(src.InSquads&&squads.Find(src.SquadsName))
    src.verbs += //Here, squad verbs would be given.
   else if(src.InSquads)
    //Here, considering the squad they were in doesn't exist any longer, they will be kicked out and considered squadless
   else
    src.verbs+=/mob/verb/Squads/Create_A_Squad


More information can be provided if necessary. The error I'm receiving is...

Error:
runtime error: Cannot execute null.Find().
proc name: SquadsCheck (/mob/proc/SquadsCheck)
  usr: PLAYER (/mob)
  src: PLAYER (/mob)
  call stack:
PLAYER (/mob): SquadsCheck()


The line number it's referencing would be...
if(src.InSquads&&squads.Find(src.SquadName))


Dec 1 2014, 12:04 pm
Are you sure that you've typed this correctly? That first line shouldn't even compile.
Dec 1 2014, 12:07 pm
Mightymo wrote:
Are you sure that you've typed this correctly? That first line shouldn't even compile.


My bad. Fixed.
Dec 1 2014, 12:13 pm
Best response
It seems likely that you are modifying the squads list elsewhere in your code; nothing seems wrong with the bit that you've provided.
Dec 1 2014, 12:16 pm
I see now. My apologies, I hadn't scanned the rest of my source. I had loaded the list from a savefile, but considering the savefile didn't exist (I didn't use the if(fexists statement) it made the list null. Thanks for making me look twice!