[Twisted-Python] UDP crashes python.exe when using IOCPReactor

[Josh Albrecht]

I've been struggling to move a large program over to IOCPReactor, but
it is causing python.exe to crash on windows.  I reduced the error to
this program, which crashes almost immediately on all the machines
I've tested it on.  Am I doing something wrong?

#############################################
from twisted.internet.iocpreactor.reactor import IOCPReactor
from twisted.internet.main import installReactor
from twisted.internet.protocol import DatagramProtocol

reactor = IOCPReactor()
installReactor(reactor)

DATA = 'HELLO'
REMOTE_IP = "127.0.0.1"
REMOTE_PORT = 33351

class EchoDatagram(DatagramProtocol):
  def datagramReceived(self, datagram, addr):
    print((addr, datagram))
    self.transport.write(datagram, addr)

p1 = EchoDatagram()
listening_port1 = reactor.listenUDP(6951, p1, interface='')
p2 = EchoDatagram()
listening_port2 = reactor.listenUDP(REMOTE_PORT, p2, interface=REMOTE_IP)

def pointless_write():
  p1.transport.write(DATA, (REMOTE_IP, REMOTE_PORT))
  for i in xrange(10):
    f = open("temp1", "wb")
    f.write("Hi!")
    f.close()
    f = open("temp1", "rb")
    data = f.read()
    f.close()
  reactor.callLater(1, pointless_write)

reactor.callLater(1, pointless_write)
reactor.run()
#############################################

This has been driving me crazy all day.  Any insights would be greatly
appreciated!

Thanks,
Josh Albrecht