Abstract sockets (linux)

[freeman via Digitalmars-d-learn]

I am having trouble using abstract sockets on Linux.

Here is sample python code that works, which works:
     ptm_sockname = "\0/var/run/ptmd.socket"
     sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
     sock.connect(ptm_sockname)
     sock.setblocking(1)
     sock.sendall('get-status detail')

Similar code in D, which does not work:
     string socket_name = "\0/var/run/ptmd.socket";
     auto address = new UnixAddress(socket_name);
     auto sock = new Socket(AddressFamily.UNIX, SocketType.STREAM);
     scope(exit) sock.close();
     sock.blocking = true;
     sock.connect(address);
     sock.send("get-status detail");

This is the equivalent with socat, which works:
     $ echo "get-status detail" | socat - 
ABSTRACT-CLIENT:/var/run/ptmd.socket

My test D program exits on connect:
std.socket.SocketOSException at runtime/phobos/std/socket.d(2674): 
Unable to connect socket: Connection refused

Any pointers?