error managment in LUA 5.0

["doneval" <ricard@...>]

Hi all,

I'm porting my code from 4.2 to 5.0 and I can't understand the new 
error managment. Could anyone explain it? in the documentation it's 
not very clear:

- Where is the error message I send with "lua_error()"? 
- Where I can get it after the error? maybe in "lua_atpanic()"?

Thanks you all!
Ricard