Adding request to error objects when it is available

lib/core/createError.js

@@ -3,15 +3,16 @@
 var enhanceError = require('./enhanceError');
 
 /**
- * Create an Error with the specified message, config, error code, and response.
+ * Create an Error with the specified message, config, error code, request and response.
  *
  * @param {string} message The error message.
  * @param {Object} config The config.
  * @param {string} [code] The error code (for example, 'ECONNABORTED').
+ @ @param {Object} [request] The request.
  @ @param {Object} [response] The response.
  * @returns {Error} The created error.
  */
-module.exports = function createError(message, config, code, response) {
+module.exports = function createError(message, config, code, request, response) {
   var error = new Error(message);
-  return enhanceError(error, config, code, response);
+  return enhanceError(error, config, code, request, response);
 };

lib/core/enhanceError.js

@@ -6,14 +6,16 @@
  * @param {Error} error The error to update.
  * @param {Object} config The config.
  * @param {string} [code] The error code (for example, 'ECONNABORTED').
+ @ @param {Object} [request] The request.
  @ @param {Object} [response] The response.
  * @returns {Error} The error.
  */
-module.exports = function enhanceError(error, config, code, response) {
+module.exports = function enhanceError(error, config, code, request, response) {
   error.config = config;
   if (code) {
     error.code = code;
   }
+  error.request = request;
   error.response = response;
   return error;
 };

lib/core/settle.js

@@ -19,6 +19,7 @@ module.exports = function settle(resolve, reject, response) {
       'Request failed with status code ' + response.status,
       response.config,
       null,
+      response.request,
       response
     ));
   }