• Version: 14.15.2
• Platform: any
• Subsystem: any

What steps will reproduce the bug?

While trying to create a cloned version of an http request object, prototype properties/methods such as headers and get get lost.

const assert = require('assert');
const http = require('http');

const server = http
  .createServer((req, res) => {
    const dummyReq = { ...req };
    res.writeHead(200, { 'Content-Type': 'text/plain' });
    res.end('ok');
    assert.deepStrictEqual(req.headers, dummyReq.headers);
  })
  .listen();

server.on('listening', () => {
  http.get(`http://localhost:${server.address().port}`);
});

What is the expected behavior?

I honestly don't know if the behavior from 14.15.1 or from 14.15.2 is expected.

Behavior until 14.15.1: dummyReq.headers is not undefined.

What do you see instead?

Output in 14.15.2: dummyReq.headers is undefined.

Additional info

The same happens while using Object.assign