Runtime Error: Cannot read from list in Developer Help

ID:139142
 
Jun 8 2011, 9:43 am
Code:
#define DEBUG

mob
    var
        list/party = new/list(0=" ", 1=" ", 2=" ", 3=" ", 4=" ", 5=" ")
mob/verb
    TestCreation()
        var/obj/Pokemon/_001/Bulbasaur = new()
        var/i
        src << "Party: [party]"
        for(i=0, i < 6, i++)
            var/o = party[i] //line 12
            if(o == " ")
                break
        party[i] = Bulbasaur


Problem description:

I get the runtime error message:

runtime error: cannot read from list
proc name: TestCreation (/mob/verb/TestCreation)
  source file: Mob.dm,12
  usr: KingCold999 (/mob)
  src: KingCold999 (/mob)
  call stack:
KingCold999 (/mob): TestCreation()


Whenever I try to test the verb. It should look for an open position in the list (defined by a string with a single space in it) and then place the newly created object (Bulbasaur) into it. "src << "Party: [party]"" should output "Party: /list" and doesnt, even though the list is already created and defined to have 6 indexes (0-5).

The error appears BEFORE line 12 is even ran, as it shows up before "Party: " is outputted, which makes entirely no sense whatsoever to me.
#1 Jun 8 2011, 8:57 pm
BYOND lists start from 1, not 0, even if you defined 0 = "" it'll probably be index 1, either "0", I'm not exactly sure about this part.
Also lists are dynamic, instead of defining size you could simply add new values into it.
#2 Jun 9 2011, 6:03 am
That shouldn't even compile. You cannot make an associative list with numerical indices.

However, in this case, there's no reason for it to be associative at all. Just make a list that's size 6 (var/list/party = new/list(6))
#3 Jun 9 2011, 6:17 am
In response to Zaoshi (#1)
Thanks zao, because of you I figured it out =)

Changed all the numbers to string indexes (IE "0" instead of 0) and it works.

I always thought lists started at 0.. like arrays in other languages o.O

Oh well. One more step to completion >:D