diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_7/extensions/regress-346642-06.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_7/extensions/regress-346642-06.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 346642;
+var summary = 'decompilation of destructuring assignment';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  expect = 3;
+  actual = '';
+  "" + function() { [] = 3 }; actual = 3;
+  actual = 3;
+  reportCompare(expect, actual, summary + ': 1');
+
+  try
+  {
+    var z = 6;
+    var f = eval('(function (){for(let [] = []; false;) let z; return z})');
+    expect =  f();
+    actual = eval("("+f+")")()
+      reportCompare(expect, actual, summary + ': 2');
+  }
+  catch(ex)
+  {
+    // See https://bugzilla.mozilla.org/show_bug.cgi?id=408957
+    var summarytrunk = 'let declaration must be direct child of block or top-level implicit block';
+    expect = 'SyntaxError';
+    actual = ex.name;
+    reportCompare(expect, actual, summarytrunk);
+  }
+
+  expect = 3;
+  actual = '';
+  "" + function () { for(;; [[a]] = [5]) { } }; actual = 3;
+  reportCompare(expect, actual, summary + ': 3');
+
+  expect = 3;
+  actual = '';
+  f = function () { return { set x([a]) { yield; } } }
+  var obj = f();
+  uneval(obj); actual = 3;
+  reportCompare(expect, actual, summary + ': 4');
+
+  expect = 3;
+  actual = '';
+  "" + function () { [y([a]=b)] = z }; actual = 3;
+  reportCompare(expect, actual, summary + ': 5');
+
+  expect = 3;
+  actual = '';
+  "" + function () { for(;; ([[,]] = p)) { } }; actual = 3;
+  reportCompare(expect, actual, summary + ': 6');
+
+  expect = 3;
+  actual = '';
+  actual = 1; try {for(x in (function ([y]) { })() ) { }}catch(ex){} actual = 3;
+  reportCompare(expect, actual, summary + ': 7');
+
+  exitFunc ('test');
+}