cluster: worker.disconnect() goes into forever loop though worker.isConnected() === true

System info:

$ uname -a
Darwin localhost 15.2.0 Darwin Kernel Version 15.2.0: Fri Nov 13 19:56:56 PST 2015; root:xnu-3248.20.55~2/RELEASE_X86_64 x86_64

verified for node@5 and node@6.

code:

'use strict';
const http = require('http'),
  cluster = require('cluster');

if (cluster.isMaster) {
  http.createServer().listen(3000);
  cluster.fork();
} else {
  process.on('uncaughtException', e => {
    console.log('uncaught', e);
    if (cluster.worker.isConnected() && !cluster.worker.isDead()) {
      cluster.worker.disconnect();
    }
  });
  http.createServer().listen(3000);
}

output:

$ node test
uncaught { Error: bind EADDRINUSE null:3000
    at Object.exports._errnoException (util.js:896:11)
    at exports._exceptionWithHostPort (util.js:919:20)
    at cb (net.js:1311:16)
    at rr (cluster.js:620:14)
    at Worker.<anonymous> (cluster.js:590:9)
    at process.<anonymous> (cluster.js:750:8)
    at emitTwo (events.js:111:20)
    at process.emit (events.js:191:7)
    at handleMessage (internal/child_process.js:718:10)
    at Pipe.channel.onread (internal/child_process.js:444:11)
  code: 'EADDRINUSE',
  errno: 'EADDRINUSE',
  syscall: 'bind',
  address: null,
  port: 3000 }
uncaught TypeError: Cannot read property 'apply' of undefined
    at process.<anonymous> (cluster.js:750:7)
    at emitTwo (events.js:111:20)
    at process.emit (events.js:191:7)
    at handleMessage (internal/child_process.js:718:10)
    at Pipe.channel.onread (internal/child_process.js:444:11)
uncaught TypeError: Cannot read property 'apply' of undefined
    at process.<anonymous> (cluster.js:750:7)
    at emitTwo (events.js:111:20)
    at process.emit (events.js:191:7)
    at handleMessage (internal/child_process.js:718:10)
    at Pipe.channel.onread (internal/child_process.js:444:11)

and it keeps going forever.

My expectations in this case:

given worker says it's connected, worker.disconnect() should be safe.

Or maybe I'm just doing smth wrong here.