diff -r 000000000000 -r 6474c204b198 intl/uconv/tests/unit/test_bug321379.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/uconv/tests/unit/test_bug321379.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+// Tests that calling close on a converter in/output stream doesn't crash
+// (bug 321379)
+
+function run_test() {
+  var StorageStream = Components.Constructor("@mozilla.org/storagestream;1",
+                                             "nsIStorageStream",
+                                             "init");
+  var ConverterInputStream = Components.Constructor("@mozilla.org/intl/converter-input-stream;1",
+                                                    "nsIConverterInputStream",
+                                                    "init");
+  var ConverterOutputStream = Components.Constructor("@mozilla.org/intl/converter-output-stream;1",
+                                                     "nsIConverterOutputStream",
+                                                     "init");
+
+
+
+  var storage = new StorageStream(1024, -1, null);
+
+  // Output
+  var outStr = storage.getOutputStream(0);
+  var out = new ConverterOutputStream(outStr, "UTF-8", 1024, 0xFFFD);
+  out.writeString("Foo.");
+  out.close();
+  out.close(); // This line should not crash. It should just do nothing.
+
+  // Input
+  var inStr = storage.newInputStream(0);
+  var inp = new ConverterInputStream(inStr, "UTF-8", 1024, 0xFFFD);
+  inp.close();
+  inp.close(); // This line should not crash. It should just do nothing.
+}