Stack overflow

[[DMC]]

hey,

i got a script for the admins when i do /admins it says

Level 10=

level 9=

etc

but when i do this its saying stack overflow

im not comfortable with posting this

so im just asking what this error means

[Callum]

That the stack has overflown. I've only ever reproduced this by calling a function from within itself, like;

function a() a() end 

[Castillo]

callum, i have seen his code if i'm right he is doing that

[Wojak]

hey,

i got a script for the admins when i do /admins it says

Level 10=

level 9=

etc

but when i do this its saying stack overflow

im not comfortable with posting this

so im just asking what this error means

there are at lest two ways to prevent this:

1) Proper Tail Call

function a()  
 return a()  
end 

Because a proper tail call uses no stack space, there is no limit on the number of "nested" tail calls that a program can make. For instance, we can call the following function with any number as argument; it will never overflow the stack.

2) setTimer function

function a()  
 setTimer (a,50,1)  
end 

i always use "setTimer" method myself, ofcourse the interval may be difrent than 50 (50 is minimum)

[[DMC]]

gues im wasting your guys time cuz idk what you guys mean

[dzek (varez)]

infinite loop/infinite recursion causes this.

Wojak:

  
-- this is infinite recursion too !! and will trigger stack overflow 
function a()  
 return a()  
end 
  

[Wojak]

i was bored in the work one day and i read the lua manual...

this expresion

function a() 
  return a() 
end 

is a "Proper Tail Cal" and lua interpreter treats it like "GoTo" and do not use any stack space. No stack -> no stack overflow

http://www.lua.org/pil/6.3.html

of course every scripter should know how to prevent Infinite loops using conditions and i think this exemple may result in FPS drop.