Encoder alphanumeric is broken on amd64

[0xfalafel]

encoder.alphanumeric doesn't encode the shellcode on amd64.

>>> context.binary = ELF('optimistic_patch')                                                                                                                                       
[*] './hackthebox/chall/pwn/Optimistic/optimistic'                                                                                                       
    Arch:     amd64-64-little                                                                                                                                                      
    RELRO:    Partial RELRO                                                                                                                                                        
    Stack:    No canary found                                                                                                                                                      
    NX:       NX disabled                                                                                                                                                          
    PIE:      PIE enabled                                                                                                                                                          
    RWX:      Has RWX segments                                                                                                                                                     
>>>                                                                                                                                                                                
>>> asm(shellcraft.amd64.linux.sh())                                                                                                                                               
b'jhH\xb8/bin///sPH\x89\xe7hri\x01\x01\x814$\x01\x01\x01\x011\xf6Vj\x08^H\x01\xe6VH\x89\xe61\xd2j;X\x0f\x05'                                                                       
>>> encoder.alphanumeric(asm(shellcraft.sh()))                                                                                                                                     
b'jhH\xb8/bin///sPH\x89\xe7hri\x01\x01\x814$\x01\x01\x01\x011\xf6Vj\x08^H\x01\xe6VH\x89\xe61\xd2j;X\x0f\x05'  

[TommyJerryMairo]

Got another error with force=True

>>> from pwn import *
>>> context.arch = 'amd64'
>>> encoder.alphanumeric(asm(shellcraft.sh()+shellcraft.exit()),force=True)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.10/site-packages/pwnlib/context/__init__.py", line 1578, in setter
    return function(*a, **kw)
  File "/usr/lib/python3.10/site-packages/pwnlib/encoders/encoder.py", line 145, in alphanumeric
    return encode(raw_bytes, expr=re_alphanumeric, *a, **kw)
  File "/usr/lib/python3.10/site-packages/pwnlib/context/__init__.py", line 1578, in setter
    return function(*a, **kw)
  File "/usr/lib/python3.10/site-packages/pwnlib/encoders/encoder.py", line 83, in encode
    v = encoder(raw_bytes, bytes(avoid), pcreg)
TypeError: 'str' object cannot be interpreted as an integer