Garbled characters encountered when decompiling Lua

Question

The lua file was from an apk using luajava and andlua, lua version seems to be 5.3.3

After I used unluac to decompile and obtain the lua file, I found that all the strings became garbled characters.

local L0_0, L1_1, L2_2, L3_3, L4_4, L5_5, L6_6, L7_7
L0_0 = _ENV
L1_1 = L0_0["]$"]
L2_2 = L0_0["u\229\136\006\133\020\186"]
L3_3 = "u\v\138\027\133\002"
L2_2 = L2_2(L3_3)
L3_3 = L0_0["u\229\136\006\133\020\186"]
L4_4 = "i\020\1460"
L3_3 = L3_3(L4_4)
L4_4 = L0_0["u\229\136\006\133\020\186"]
L5_5 = "x\230k\237`\247,\227\145\015\158"
L4_4 = L4_4(L5_5)
L5_5 = L4_4
function L6_6(A0_8, A1_9, A2_10, A3_11)
  local L4_12
  L4_12 = L0_0
  return L4_4["d\030\181(\213x\241"](A0_8, A1_9, A2_10, A3_11, "m\031\1878")
end
L5_5["k\028\176$\208B\248\195"] = L6_6
function L6_6(A0_13, A1_14, A2_15, A3_16)
  local L4_17
  L4_17 = L0_0
  return L4_4["d\030\181(\213x\241"](A0_13, A1_14, A2_15, A3_16, "l\029\132$\136")
end
L5_5["k\028\176$\208B\248\193"] = L6_6
function L6_6(A0_18, A1_19, A2_20)
  local L3_21, L4_22, L5_23, L6_24, L7_25
  L3_21 = L0_0
  if A0_18 == "+" then
    A0_18 = "7\016E\130\2115b"
  end
  L4_22 = L4_4["g\004\162"]
  L4_22 = L4_22["l\024\155\003\176#\203E\240w\236"]
  L5_23 = A0_18
  L5_23 = L4_22(L5_23)
  if not L4_22 then
    L6_24 = nil
    L7_25 = L5_23
    return L6_24, L7_25
  end
  L6_24, L7_25 = nil, nil
  L5_23 = "|\2533\250z\242z\181y\2487\246|\252k\252i\233"
  for _FORV_11_, _FORV_12_ in L1_1["o\005\133=\177@"](L4_22) do
    if _FORV_12_["`\019\179\"\219]"] == "m\031\1878" then
      L6_24, L5_23 = L4_4["p\031\132Y"]()
    else
      L6_24, L5_23 = L4_4["p\031\132["]()
    end
    if not L6_24 then
      return nil, L5_23
    end
    L6_24["z\224v\017\138\003\154\031\130"](L6_24, "{\225u\b\147\019\137\r\150", true)
    L7_25, L5_23 = L6_24["f\003\190S"](L6_24, _FORV_12_["e\r\170F"], A1_19)
    if not L7_25 then
      L6_24["f\001\186M\195"](L6_24)
    else
      L7_25, L5_23 = L6_24["j\017\153)\170,"](L6_24, A2_20)
      if not L7_25 then
        L6_24["f\001\186M\195"](L6_24)
      else
        return L6_24
      end
    end
  end
  return nil, L5_23
end

I tried hard to find the original file of one of the lua files on the Internet, and found that all the strings and methods had become garbled characters.

local base = _G
local string = require("string")
local math = require("math")
local socket = require("socket.core")

local _M = socket

-----------------------------------------------------------------------------
-- Exported auxiliar functions
-----------------------------------------------------------------------------
function _M.connect4(address, port, laddress, lport)
    return socket.connect(address, port, laddress, lport, "inet")
end

function _M.connect6(address, port, laddress, lport)
    return socket.connect(address, port, laddress, lport, "inet6")
end

function _M.bind(host, port, backlog)
    if host == "*" then host = "0.0.0.0" end
    local addrinfo, err = socket.dns.getaddrinfo(host);
    if not addrinfo then return nil, err end
    local sock, res
    err = "no info on address"
    for i, alt in base.ipairs(addrinfo) do
        if alt.family == "inet" then
            sock, err = socket.tcp4()
        else
            sock, err = socket.tcp6()
        end
        if not sock then return nil, err end
        sock:setoption("reuseaddr", true)
        res, err = sock:bind(alt.addr, port)
        if not res then
            sock:close()
        else
            res, err = sock:listen(backlog)
            if not res then
                sock:close()
            else
                return sock
            end
        end
    end
    return nil, err
end

The Luas file

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

Can anyone tell me what's going on and how I can get the normal source files?