Re: The attempt to call a nil value problem

[Alexander Gladysh <agladysh@...>]

> I don t know exactly but in my experience it is strongly probable that
> you forgot to declare the variable as local and lua is binding it to
> the enclosing scope. This kind of problem can be hard to spot because
> is some cases the program can actually work when you debug it at the
> beginning.

One way to do it is to grep bytecode dumps for GETGLOBAL and SETGLOBAL.

See here: http://lua-users.org/wiki/DetectingUndefinedVariables

Alexander.