http: request.abort() does not destroy the socket when using a Unix Domain Socket

[lpinca]

• Version: v7.4.0
• Platform: Linux
• Subsystem: http

When using a Unix Domain Socket, request.abort() does not destroy the socket if abort() is called before a socket is assigned to the request.

Here is a test case:

'use strict';

const http = require('http');

const socketPath = `/tmp/test_socket_${Date.now()}`;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello World');
});

server.listen(socketPath, () => {
  const req = http.get({ socketPath });

  req.on('error', () => {});
  req.abort();

  setTimeout(() => server.close(), 100);
});

The process should exit after the timeout, but it doesn't. If abort() is called when the socket is assigned to the request, everything work as expected.

From a quick look it seems that the free event is emitted on the socket, but nothing happens after that.