segfault on macOS when running Python getaddrinfo for '0'

[aviramha]

Bug Description

This crashes because the ip is an empty string which for some reason panics.

Steps to Reproduce

import sys, signal
import http.server
import socketserver

# Reading portnumber from command line
if sys.argv[1:]:
  port = int(sys.argv[1])
else:
  port = 90

# Note ForkingTCPServer does not work on Windows as the os.fork()
# function is not available on that OS. Instead we must use the
# subprocess server to handle multiple requests
server = socketserver.ThreadingTCPServer(('',port), http.server.SimpleHTTPRequestHandler )

#Ensures that Ctrl-C cleanly kills all spawned threads
server.daemon_threads = True
#Quicker rebinding
server.allow_reuse_address = True

try:
  while True:
    sys.stdout.flush()
    server.serve_forever()
except KeyboardInterrupt:
  pass

server.server_close()

Backtrace

No response

Relevant Logs

No response

Your operating system and version

macOS

Local process

Python

Local process version

No response

Additional Info

No response

[aviramha]

Closed with #938