diff -r 000000000000 -r 6474c204b198 addon-sdk/source/test/fixtures/loader/missing-twice/main.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/test/fixtures/loader/missing-twice/main.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,32 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+'use strict';
+
+try {
+  require('./not-found');
+}
+catch (e1) {
+  exports.firstError = e1;
+  // It should throw again and not be cached
+  try {
+    require('./not-found');
+  }
+  catch (e2) {
+    exports.secondError = e2;
+  }
+}
+
+try {
+  require('./file.json');
+}
+catch (e) {
+  exports.invalidJSON1 = e;
+  try {
+    require('./file.json');
+  }
+  catch (e) {
+    exports.invalidJSON2 = e;
+  }
+}