LUA 4 error tracking?

["Zdenek Stangl" <stangl@...>]

Hi,
users of my application are calling for detailed error tracking in lua scripts. For now I just register the _ERRORMESSAGE by

...
// redirect the error handling 
lua_register(L, "_ERRORMESSAGE", error);
...

// error handling routine
static int error(lua_State * L)
{
    DisplayError( lua_tostring(L, 1) );
    return 0;
} 
...

Is there any way how to get also the line number in script which has caused an error?

Thanx
ptaczek.