Unable to post a message to a port whose entangled port has listeners on it

[hjdivad]

var mc = new MessageChannel();
mc.port1.start();
mc.port2.start();

mc.port2.addEventListener('message', function(event){ console.log(event.data); });

mc.port1.postMessage('hai');
// => "Uncaught Error: DATA_CLONE_ERR: Kamino Exception 25"

This is because we try to encode the target port when sending a message. From what I can tell, _getPort is used both for transferring ports and to indicate the proper recipient of a message.

In the former case we need the uuid, entangled uuid and message queue. In the latter case, we really only need the uuid of the recipient.

cc @Cyril-sf

[cyril-sf]

We probably need to remove temporarily the listeners in MessageChannel.encodeEvent like we do for the _currentTarget

https://github.com/tildeio/MessageChannel.js/blob/master/lib/message_channel.js#L238

[cyril-sf]

This happens because you don't transfer the port. Otherwise the listener would be attached to the port in the other user agent.

[hjdivad]

@Cyril-sf I know, but that's a bug in the near-poly. You don't have to transfer the port.

[cyril-sf]

@hjdivad confirm