Hphpd's Jump command has been fundamentally broken for a long time. It was originally implemented to run the byte code in a modified way which didn't make state changes, and wait for the destination offset to be reached. We lost the ability to do that long ago, and the implementation of this command has atrophied since. As it stands now, if you're lucky it might act like "run until", which is the opposite of what it is documented to do.
I've removed the command entirely. Fixing it is a very large effort which we might consider some time in the future.
I found myself getting confused, thinking that proxy->send(cmd) sends a command to the proxy, when in fact it causes the proxy to send the command to the client. These are now named sendToClient, sendToServer and recvFromServer so that future readers (including my future self) will not make this mistake again.
This change is mostly for FB internal organizational reasons.
Building is not effected beyond the fact that the target now
lands in hphp/hhvm/hhvm rather than src/hhvm/hhvm.
Mike Magruder