Patched removeAllListeners() doesn't seem to return the EventEmitter instance

[jfstgermain]

Hello, I'm using zone.js in an node app and a module chains calls to removeAllListeners(). The patched version of removeAllListeners() doesn't seem to return the EventEmitter.
The following code breaks:

socket.removeAllListeners('error')
  .removeAllListeners('connect')
  .removeAllListeners('secureConnect');

Here's my zone.js setup code:

const Bluebird = require('bluebird');
require('zone.js/dist/zone-node');
require('zone.js/dist/zone-bluebird');

Zone[Zone.__symbol__('bluebird')](Bluebird);

delete global.Promise;

global.Promise = Bluebird;

Am I missing something?

[JiaLiPassion]

Thank you for posting the issue, I will check it.