MessageChannel not working between Workers in Bun

[luckyyyyy]

What version of Bun is running?

1.2.2

What steps can reproduce the bug?

When trying to establish communication between two Workers using MessageChannel in Bun, the messages are not being transmitted between the Workers, while the same code works correctly in Node.js.

Reproduction

import { Worker, isMainThread, parentPort, MessageChannel, threadId } from 'worker_threads';
import { fileURLToPath } from 'url';

if (isMainThread) {
  const worker1 = new Worker(fileURLToPath(import.meta.url));
  const worker2 = new Worker(fileURLToPath(import.meta.url));
  const { port1, port2 } = new MessageChannel();

  worker1.postMessage({ port: port1, workerId: 1 }, [port1]);
  worker2.postMessage({ port: port2, workerId: 2 }, [port2]);

  worker1.on('message', (msg) => console.log('Main thread received from worker1:', msg));
  worker2.on('message', (msg) => console.log('Main thread received from worker2:', msg));
} else {
  let workerPort;
  let myWorkerId;

  parentPort.on('message', ({ port, workerId }) => {
    workerPort = port;
    myWorkerId = workerId;

    workerPort.on('message', (msg) => {
      console.log(`Worker ${myWorkerId} received:`, msg);
      workerPort.postMessage(`Reply from worker ${myWorkerId}`);
    });

    workerPort.postMessage(`Hello from worker ${myWorkerId}`);
  });

  parentPort.postMessage(`Worker ${threadId} started`);
}

Expected Behavior

• Workers should be able to communicate with each other through MessageChannel ports
• Messages sent through MessageChannel ports should be received by the other Worker
• Similar behavior to Node.js implementation

Actual Behavior

• Messages are not being transmitted between Workers
• No errors are thrown
• Communication does not work as expected

Environment

• Bun Version: 1.2.2
• Operating System: macOS

Additional Context

• The same code works correctly in Node.js
• This affects the ability to implement direct Worker-to-Worker communication in Bun applications