diff -r 000000000000 -r 6474c204b198 js/xpconnect/tests/unit/test_bogus_files.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/xpconnect/tests/unit/test_bogus_files.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,42 @@
+/* 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/. */
+ 
+function test_BrokenFile(path, shouldThrow, expectedName) {
+  var didThrow = false;
+  try {
+    Components.utils.import(path);
+  } catch (ex) {
+    var exceptionName = ex.name;
+    print("ex: " + ex + "; name = " + ex.name);
+    didThrow = true;
+  }
+
+  do_check_eq(didThrow, shouldThrow);
+  if (didThrow)
+    do_check_eq(exceptionName, expectedName);
+}
+
+function run_test() {
+  test_BrokenFile("resource://test/bogus_exports_type.jsm", true, "Error");
+
+  test_BrokenFile("resource://test/bogus_element_type.jsm", true, "Error");
+
+  test_BrokenFile("resource://test/non_existing.jsm",
+                  true,
+                  "NS_ERROR_FILE_NOT_FOUND");
+
+  test_BrokenFile("chrome://test/content/test.jsm",
+                  true,
+                  "NS_ERROR_ILLEGAL_VALUE");
+
+  // check that we can access modules' global objects even if
+  // EXPORTED_SYMBOLS is missing or ill-formed:
+  do_check_eq(typeof(Components.utils.import("resource://test/bogus_exports_type.jsm",
+                                             null)),
+              "object");
+
+  do_check_eq(typeof(Components.utils.import("resource://test/bogus_element_type.jsm",
+                                             null)),
+              "object");
+}