async_hooks: triggerAsyncId can be undefined

lib/_http_outgoing.js

@@ -642,7 +642,7 @@ OutgoingMessage.prototype.write = function write(chunk, encoding, callback) {
 function write_(msg, chunk, encoding, callback, fromEnd) {
   if (msg.finished) {
     var err = new Error('write after end');
-    nextTick(msg.socket[async_id_symbol],
+    nextTick(msg.socket && msg.socket[async_id_symbol],
              writeAfterEndNT.bind(msg),
              err,
              callback);

lib/internal/process/next_tick.js

@@ -281,7 +281,7 @@ function setupNextTick() {
     if (process._exiting)
       return;
 
-    if (triggerAsyncId === null) {
+    if (!Number.isSafeInteger(triggerAsyncId) || triggerAsyncId <= 0) {
       triggerAsyncId = async_hooks.initTriggerId();
     }
 

test/async-hooks/test-internal-nexttick-default-trigger.js

@@ -26,6 +26,11 @@ internal.nextTick(null, common.mustCall(function() {
   assert.strictEqual(async_hooks.triggerAsyncId(), rootAsyncId);
 }));
 
+// internal default
+internal.nextTick(undefined, common.mustCall(function() {
+  assert.strictEqual(async_hooks.triggerAsyncId(), rootAsyncId);
+}));
+
 // internal
 internal.nextTick(rootAsyncId + 1, common.mustCall(function() {
   assert.strictEqual(async_hooks.triggerAsyncId(), rootAsyncId + 1);

test/parallel/test-http-outgoing-message-inheritance.js

@@ -0,0 +1,32 @@
+'use strict';
+
+const common = require('../common');
+const { OutgoingMessage } = require('http');
+const { Writable } = require('stream');
+const assert = require('assert');
+
+// check that OutgoingMessage can be used without a proper Socket
+// Fixes: https://github.com/nodejs/node/issues/14386
+// Fixes: https://github.com/nodejs/node/issues/14381
+
+class Response extends OutgoingMessage {
+  constructor() {
+    super({ method: 'GET', httpVersionMajor: 1, httpVersionMinor: 1 });
+  }
+
+  _implicitHeader() {}
+}
+
+const res = new Response();
+const ws = new Writable({
+  write: common.mustCall((chunk, encoding, callback) => {
+    assert(chunk.toString().match(/hello world/));
+    setImmediate(callback);
+  })
+});
+
+res.socket = ws;
+ws._httpMessage = res;
+res.connection = ws;
+
+res.end('hello world');

test/parallel/test-http-server-response-standalone.js

@@ -0,0 +1,27 @@
+'use strict';
+
+const common = require('../common');
+const { ServerResponse } = require('http');
+const { Writable } = require('stream');
+const assert = require('assert');
+
+// check that ServerResponse can be used without a proper Socket
+// Fixes: https://github.com/nodejs/node/issues/14386
+// Fixes: https://github.com/nodejs/node/issues/14381
+
+const res = new ServerResponse({
+  method: 'GET',
+  httpVersionMajor: 1,
+  httpVersionMinor: 1
+});
+
+const ws = new Writable({
+  write: common.mustCall((chunk, encoding, callback) => {
+    assert(chunk.toString().match(/hello world/));
+    setImmediate(callback);
+  })
+});
+
+res.assignSocket(ws);
+
+res.end('hello world');

test/parallel/test-http-server-write-after-end.js

@@ -0,0 +1,27 @@
+'use strict';
+
+const common = require('../common');
+const http = require('http');
+const assert = require('assert');
+
+// Fix for https://github.com/nodejs/node/issues/14368
+
+const server = http.createServer(handle);
+
+function handle(req, res) {
+  res.on('error', common.mustCall((err) => {
+    assert.strictEqual(err.message, 'write after end');
+    server.close();
+  }));
+
+  res.write('hello');
+  res.end();
+
+  setImmediate(common.mustCall(() => {
+    res.write('world');
+  }));
+}
+
+server.listen(0, common.mustCall(() => {
+  http.get(`http://localhost:${server.address().port}`);
+}));