[Twisted-Python] socket is not closed when connection failed

Hi everyone, I found that if a TCP connection is failed, e.g. UserTimeout or No route to host, connection refused, etc, i.e. when factory.ConnectionFailed is called, the socket is not properly cleaned up. i.e. socket.close() wasn't called. In this case, when I try to connect to many unreachable hosts, my file descriptor will finally be gone. Could someone confirm me on this? Thanks. I'm using twisted 1.3.0rc1 Yun