Minecraft Version

1.21.x

Version

1.115.1

Details

Trying to unpack a string with a format string ">I[1]" will error with invalid format option '[', even though the Lua 5.3 Reference Manual (6.4.2) permits it.

(i'm probably using an ancient version by now, but this seems like it hasn't been fixed yet)

Ahh, I think this is the Lua docs being a little confusing! The whole [n] is a placeholder for the width, rather than just the n:

Lua 5.4.7  Copyright (C) 1994-2024 Lua.org, PUC-Rio
> string.pack(">I[1]", 65)
stdin:1: invalid format option '['
stack traceback:
	[C]: in function 'string.pack'
	stdin:1: in main chunk
	[C]: in ?
> string.pack(">I1", 65)
A

The latter of these does work in CC: