Keep getting the same error:
[string "-- Variables..."]:55: bad argument #1 to `byte` (string expected, got nil):
stack traceback:
[C]: in function `string.byte`
[string "-- Variables..."]:55: in local `readint`
[string "-- Variables..."]:69: in upvalue `ext`
[string "-- Variables..."]:279: in upvalue `install`
[string "-- Variables..."]:304: in local `process`
[string "-- Variables..."]:341: in main chunk
/tmp/2055986002.0:17: in main chunk
(...tail calls...)
[C]: in function `xpcall`
machine:789: in global `xpcall`
/lib/process.lu