Emit FormData error events as Request error events

request.js

@@ -1428,6 +1428,11 @@ Request.prototype.form = function (form) {
   }
   // create form-data object
   self._form = new FormData()
+  self._form.on('error',function(err) {
+    err.message = 'form-data: ' + err.message
+    self.emit('error', err)
+    self.abort()
+  })
   return self._form
 }
 Request.prototype.multipart = function (multipart) {

tests/test-form-data-error.js

@@ -0,0 +1,34 @@
+'use strict'
+
+var request = require('../index')
+  , server = require('./server')
+  , tape = require('tape')
+
+var s = server.createServer()
+
+tape('setup', function(t) {
+  s.listen(s.port, function() {
+    t.end()
+  })
+})
+
+tape('re-emit formData errors', function(t) {
+  s.on('/', function(req, res) {
+    res.writeHead(400)
+    res.end()
+    t.fail('The form-data error did not abort the request.')
+  })
+
+  request.post(s.url, function (err, res, body) {
+    t.equal(err.message, 'form-data: Arrays are not supported.')
+    setTimeout(function() {
+      t.end()
+    }, 10)
+  }).form().append('field', ['value1', 'value2'])
+})
+
+tape('cleanup', function(t) {
+  s.close(function() {
+    t.end()
+  })
+})