Lua 5.4 upvalue bug?

[Dmitiry Ryzhenko]

The 5.1, 5.2 and 5.3 interpreters execute the following code without any errors. but with the
$ lua -v
Lua 5.4.7  Copyright (C) 1994-2024 Lua.org, PUC-Rio


local bool_to_num = {
    [true] = 1,
    [false] = 0,
}
local function foo()
    print(bool_to_num[1 < 0])
    print(bool_to_num[1 > 0])
end

foo()


$ lua some.lua
0
lua: some.lua:7: attempt to index a number value
stack traceback:
        some.lua:7: in local 'foo'
        some.lua:10: in main chunk
        [C]: in ?

-----

local bool_to_num = {
    [true] = 1,
    [false] = 0,
}
local function foo()
    print(bool_to_num[false])
    print(bool_to_num[true])
end

foo()


$ lua some.lua
0
1

[Luiz Henrique de Figueiredo]

Thanks for the report. 

It’s a known bug:

https://www.lua.org/bugs.html#5.4.7-2