segfaults on win32

srv.py

import socket
from gi.repository import GObject, GLib

#based on http://rox.sourceforge.net/desktop/node/413.html

def handler(conn, flags, sock):
	'''Asynchronous connection handler. Processes each line from the socket.'''
	line = sock.recv(4096)
	if not len(line):
		print("Connection closed.")
		return False
	else:
		print(line)
		return True

def listener(conn, flags, sock):
	'''Asynchronous connection listener. Starts a handler for each connection.'''
	conn, addr = sock.accept()
	print("Connected")
	GObject.io_add_watch(conn, GObject.IO_IN, handler, conn)
	return True

msock = socket.socket()
msock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
msock.bind(("localhost", 1337))
msock.listen(1)
print("Listening...")
GObject.io_add_watch(msock, GObject.IO_IN, listener, msock)

GObject.MainLoop().run()