Ensure request is defined in error handler

lib/XMLHttpRequest.js

@@ -859,19 +859,23 @@ function XMLHttpRequest(opts) {
       }
 
       // Error handler for the request
-      var errorHandler = function(error) {
+      var errorHandler = function(error, associatedRequest) {
         // In the case of https://nodejs.org/api/http.html#requestreusedsocket triggering an ECONNRESET,
         // don't fail the xhr request, attempt again.
-        if (request.reusedSocket && error.code === 'ECONNRESET')
-          return doRequest(options, responseHandler).on('error', errorHandler);
+        if (associatedRequest.reusedSocket && error.code === 'ECONNRESET')
+        {
+          const retryRequest = doRequest(options, responseHandler)
+          retryRequest.on('error', (error) => errorHandler(error, retryRequest));
+        }
         handleError(error);
       }
 
       var createRequest = function (opt) {
         opt = Object.assign(Object.create(null), opt);
         if (isSsl) Object.assign(opt, sslOptions);
 
-        request = doRequest(opt, responseHandler).on('error', errorHandler);
+        const httpRequest = doRequest(opt, responseHandler);
+        request = httpRequest.on('error', (error) => errorHandler(error, httpRequest));
 
         if (opts.autoUnref) {
           request.on('socket', function (socket) {

tests/abort-request.js

@@ -0,0 +1,41 @@
+'use strict';
+
+const http = require('http');
+const XHR = require('../lib/XMLHttpRequest').XMLHttpRequest;
+
+process.on('uncaughtException', (e) => { console.error('uncaught: ', e); process.exitCode = 1; });
+process.on('unhandledRejection', (e) => { console.error('unhandled: ', e); process.exitCode = 2; });
+
+const server = http.createServer((req, res) => {
+  // never respond to requests - simulate slow server for the abort
+});
+
+server.listen(0, '127.0.0.1', () => {
+  requestAndAbort();
+});
+
+function requestAndAbort() {
+  const url = new URL(`http://127.0.0.1:${server.address().port}`);
+  const xhr = new XHR();
+
+  xhr.open('GET', url);
+  xhr.send();
+
+  setTimeout(() => {
+    console.log('calling abort');
+    try { 
+      xhr.abort()
+    }
+    catch (e) {
+      console.error('abort threw:', e);
+      process.exitCode = 3;
+    }
+    console.log('aborted request')
+    setTimeout(() => { 
+      server.close();
+      server.closeAllConnections?.();
+      process.exit();
+    }, 500);
+
+  }, 200);
+}