Incompatibility with Node.js: Custom methods on extended Socket class not recognized

[vikiboss]

What version of Bun is running?

v1.1.42, and Node.js v22.11.0

What platform is your computer?

Darwin 22.5.0 arm64 arm

What steps can reproduce the bug?

1. Create a file named main.mjs and insert the following code:

import { Socket } from 'node:net';

class Network extends Socket {
  join() {
    console.log('Joined!');
  }
}

const n = new Network();

n.on('connect', () => {
  console.log('Connected!');
  n.join();
});

n.connect(443, 'google.com');

2. Execute the script with bun run main.mjs and node main.mjs. Observing the error thrown by bun will reveal:

Connected!
10 | 
11 | n.connect(443, 'google.com')
12 | 
13 | n.on('connect', () => {
14 |   console.log('Connected!')
15 |   n.join()
         ^
TypeError: n.join is not a function. (In 'n.join()', 'n.join' is undefined)
      at /main.mjs:15:5
      at emit (node:events:75:22)
      at open (node:net:102:63)

What is the expected behavior?

Bun is expected to exhibit behavior identical to that of Node.js, or did I miss something？

What do you see instead?

No response

Additional information

No response