Error when using proxy

[jammys]

Hello, and thank you for this great tool.

I recently noticed that rpivot doesn't seem to work well when proxy parameters are set.

Here is the error:

Traceback (most recent call last):
File "client.py", line 499, in
main()
File "client.py", line 467, in main
bc_sock.connect((backconnect_host, backconnect_port))
File "client.py", line 341, in connect
logger.error("Couldn't parse proxy challenge. Code {0}. Msg {1}".format(code, msg))
UnboundLocalError: local variable 'code' referenced before assignment

Tested it with free HTTP proxy and free SOCKS proxy publicly available. NTLM (http) proxy doesn't work either. @artkond @klsecurityservices any clue on the origin of this error?