Permission checking will fail after UseApplicationCommands

[CleverSource]

There is an issue where permission checking will fail for flags defined after UseApplicationCommands. This is because permission flags above 31 require left-shifting beyond 1 << 31, which is not possible for Luau's bit32 library because it uses 32-bit numbers.

Edit: This can be fixed by using the mathematical equivalent, 2^n, where n is the second param passed to bit32.lshift when defining permission flags. Usage of bit32.band in the DiscordPermission can be fixed by splitting 64-bit numbers into two 32-bit parts (high & low) and then joining them back together.

Sample code (with appropriate typing) for bit32.band extended to 64-bit numbers:

local function band(...: number): number
    local args = {...}

    local high, low = (args[1] / 0x100000000), (args[1] % 0x100000000)

    for i = 2, #args do
        local x = args[i]
        local high2, low2 = (x / 0x100000000), (x % 0x100000000)
        
        high = bit32.band(high, high2)
        low = bit32.band(low, low2)
    end

    high = bit32.rshift(high, 1) * 2 + bit32.band(high, 1)
    low = bit32.rshift(low, 1) * 2 + bit32.band(low, 1)

    return (high * 2^32) + (low % 2^32)
end

This concept can be extended to other bit32 functions.

You can confirm this by trying something such as band(0xFFFFFFFF00000000, 0x0000FFFF00000000) vs. bit32.band(0xFFFFFFFF00000000, 0x0000FFFF00000000). The first result is what you will get if you compare with Lua 5.4 and run print(0xFFFFFFFF00000000 & 0x0000FFFF00000000)