Function luaB_error

src/Chain/libraries/glua/lbaselib.cpp:199–209

static int luaB_error(lua_State *L) {
    int level = (int)luaL_optinteger(L, 2, 1);
    lua_settop(L, 1);
    if (lua_isstring(L, 1) && level > 0) {  /* add extra information? */
        luaL_where(L, level);
        lua_pushvalue(L, 1);
        lua_concat(L, 2);
    }
	global_glua_chain_api->throw_exception(L, THINKYOUNG_API_THROW_ERROR, luaL_checkstring(L, 1));
    return lua_error(L);
}

static int luaB_exit(lua_State *L) {
	if (lua_gettop(L) < 1 || !lua_isstring(L, -1))