44   lua_Debug ar;  in luaL_argerror()  local
45   if (!lua_getstack(L, 0, &ar))  /* no stack frame? */  in luaL_argerror()
47   lua_getinfo(L, "n", &ar);  in luaL_argerror()
48   if (strcmp(ar.namewhat, "method") == 0) {  in luaL_argerror()
52                            ar.name, extramsg);  in luaL_argerror()
54   if (ar.name == NULL)  in luaL_argerror()
55     ar.name = "?";  in luaL_argerror()
57                         narg, ar.name, extramsg);  in luaL_argerror()
74   lua_Debug ar;  in luaL_where()  local
75   if (lua_getstack(L, level, &ar)) {  /* check function at level */  in luaL_where()
76     lua_getinfo(L, "Sl", &ar);  /* get info about it */  in luaL_where()
77     if (ar.currentline > 0) {  /* is there info? */  in luaL_where()
78       lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline);  in luaL_where()