Re: lua_pcall

[RLake@...]

> Is there some sample source code showing how to use lua_pcall with 
> err_func != 0?  Basically when I'm calling into Lua and an error 
> occurs I'd like to see the debug traceback, but I'm not quite sure how 
> to do that based on the docs.

Probably the best sample code is in lua.c, which shows how to call
a traceback function. The traceback function itself is in the debug
library, and you can use it as a guide on how to walk the stack, if
you want to do your own.

The key thing to remember is that the err_func runs before the
error is thrown, so it still has the whole stack available to it.
Once the error is thrown, the stack is cleaned.