minetest/builtin/init.lua
Diego Martinez 430195381d builtin: Fix print crashing on nil "holes".
The engine implementation of `print` packs the varargs into a
table and passes the table directly to `table.concat`. If you
pass any value not supported by `table.concat` (particularly
`nil`), the server crashes. This is unexpected behavior, as
`print` is supposed to be able to work with anything.

This patch changes the implementation so it first converts
all arguments using `tostring`, which fixes the issue and
makes the custom `print` function compatible with the stock
Lua behavior.
2016-02-08 01:55:02 +01:00

52 lines
1.4 KiB
Lua

--
-- This file contains built-in stuff in Minetest implemented in Lua.
--
-- It is always loaded and executed after registration of the C API,
-- before loading and running any mods.
--
-- Initialize some very basic things
function core.debug(...) core.log(table.concat({...}, "\t")) end
if core.print then
local core_print = core.print
-- Override native print and use
-- terminal if that's turned on
function print(...)
local n, t = select("#", ...), { ... }
for i = 1, n do
t[i] = tostring(t[i])
end
core_print(table.concat(t, "\t"))
end
core.print = nil -- don't pollute our namespace
end
math.randomseed(os.time())
os.setlocale("C", "numeric")
minetest = core
-- Load other files
local scriptdir = core.get_builtin_path()..DIR_DELIM
local gamepath = scriptdir.."game"..DIR_DELIM
local commonpath = scriptdir.."common"..DIR_DELIM
local asyncpath = scriptdir.."async"..DIR_DELIM
dofile(commonpath.."strict.lua")
dofile(commonpath.."serialize.lua")
dofile(commonpath.."misc_helpers.lua")
if INIT == "game" then
dofile(gamepath.."init.lua")
elseif INIT == "mainmenu" then
local mainmenuscript = core.setting_get("main_menu_script")
if mainmenuscript ~= nil and mainmenuscript ~= "" then
dofile(mainmenuscript)
else
dofile(core.get_mainmenu_path()..DIR_DELIM.."init.lua")
end
elseif INIT == "async" then
dofile(asyncpath.."init.lua")
else
error(("Unrecognized builtin initialization type %s!"):format(tostring(INIT)))
end