Null path

ID:264924
 
May 11 2011, 5:26 am
Code:
turf
    Grass
        icon='Grass.dmi'
        mouse_opacity=2
        Click()
            var/Ref="/obj/Tracks/[usr.Placed]"
            var/obj/A=text2path(Ref)
            var/obj/O = new A(src)


Problem description:
runtime error: Cannot create objects of type null.
proc name: Click (/turf/Grass/Click)
source file: Tracks.dm,8
usr: National Guardsmen (/mob)
src: Grass (2,7,1) (/turf/Grass)
call stack:
Grass (2,7,1) (/turf/Grass): Click(Grass (2,7,1) (/turf/Grass), "default.map1", "icon-x=26;icon-y=19;left=1;scr...")

I am confused on how I am trying creating a null object, from my understanding text2path converts a text string into a path I can use. But for some reason I keep getting the above runtime error, anyone care to explain to me what im doing wrong?

May 11 2011, 5:52 am
Confirm that the type path is defined (you can test that Ref is not null, for example). Also, casting the path returned by text2path() as a /obj is technically incorrect, but I don't think it would cause this.

If you need more assistance, can you give us an example of the value for usr.Placed and the related type path definition?
May 11 2011, 6:10 am
In response to DarkCampainger
 
mob
    var/Placed
    verb
        Place(var/T as text)
            src.Placed=T
obj
    Tracks
        icon='Tracks.dmi'
        NORTH
            name="NORTH"
            icon_state="North"

And I am passing the verb Place argument as NORTH.
May 11 2011, 6:31 am
In response to National Guardsmen
Try using any name but NORTH. My guess is that this is a weird compiler bug, arising because you're using a constant's name for your type.

Also, try adding this test code:
world<<usr.Placed
world<<"/obj/Tracks/[usr.Placed]"
world<</obj/Tracks/NORTH
world<<text2path("/obj/Tracks/[usr.Placed]")
world<<text2path("/obj/Tracks/NORTH")
May 12 2011, 10:07 pm
In response to DarkCampainger
Ok have tried all sorts of debugging as suggested. I still can't seem to get this to work. It stumps me that something this simple as got me in a bind.
May 12 2011, 10:18 pm
In response to National Guardsmen
What was the output of the test code? Were they all the same? (Well, besides the first one)