a bug in lua5.3

[QSlash]

test.lua:
local arry={1,2,3}
function check(idx)
return arry[idx] or arry[#arry]
end

cmd:
luac test.lua
luadec luac.out>res.lua

res.lua:
-- Decompiled using luadec 2.2 rev: $WCREV$ for Lua 5.3 from https://github.com/viruscamp/luadec
-- Command line: luac.out

-- params : ...
-- function num : 0 , upvalues : _ENV
local arry = {1, 2, 3}
check = function(idx)
-- function num : 0_0 , upvalues : arry
if not arry[idx] then
return arry[#arry]
end
end

[rocky]

Seems like a similar thing to #75 is going on here. So also see the section "Status" in https://github.com/sztupy/luadec51/blob/master/README.markdown

And as with #75 this problem is fixed in unluac