diff -r 000000000000 -r 6474c204b198 modules/libjar/test/unit/test_bug370103.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/libjar/test/unit/test_bug370103.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,26 @@
+var Cc = Components.classes;
+var Ci = Components.interfaces;
+
+// Regression test for bug 370103 - crash when passing a null listener to
+// nsIChannel.asyncOpen
+function run_test() {
+  // Compose the jar: url
+  var ioService = Cc["@mozilla.org/network/io-service;1"].
+                    getService(Ci.nsIIOService);
+  var file = do_get_file("data/test_bug370103.jar");
+  var url = ioService.newFileURI(file).spec;
+  url = "jar:" + url + "!/test_bug370103";
+
+  // Try opening channel with null listener
+  var channel = ioService.newChannel(url, null, null);
+
+  var exception = false;
+  try {
+    channel.asyncOpen(null, null);
+  }
+  catch(e) {
+    exception = true;
+  }
+
+  do_check_true(exception); // should throw exception instead of crashing
+}