diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_3/extensions/regress-188206-01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_3/extensions/regress-188206-01.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 UBound = 0;
+var BUGNUMBER = 188206;
+var summary = 'Invalid use of regexp quantifiers should generate SyntaxErrors';
+var TEST_PASSED = 'SyntaxError';
+var TEST_FAILED = 'Generated an error, but NOT a SyntaxError!';
+var TEST_FAILED_BADLY = 'Did not generate ANY error!!!';
+var status = '';
+var statusitems = [];
+var actual = '';
+var actualvalues = [];
+var expect= '';
+var expectedvalues = [];
+
+
+/*
+ * Now do some weird things on the left side of the regexps -
+ */
+status = inSection(7);
+testThis(' /*a/ ');
+
+status = inSection(8);
+testThis(' /**a/ ');
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+/*
+ * Invalid syntax should generate a SyntaxError
+ */
+function testThis(sInvalidSyntax)
+{
+  expect = TEST_PASSED;
+  actual = TEST_FAILED_BADLY;
+
+  try
+  {
+    eval(sInvalidSyntax);
+  }
+  catch(e)
+  {
+    if (e instanceof SyntaxError)
+      actual = TEST_PASSED;
+    else
+      actual = TEST_FAILED;
+  }
+
+  statusitems[UBound] = status;
+  expectedvalues[UBound] = expect;
+  actualvalues[UBound] = actual;
+  UBound++;
+}
+
+
+function test()
+{
+  enterFunc('test');
+  printBugNumber(BUGNUMBER);
+  printStatus(summary);
+
+  for (var i=0; i<UBound; i++)
+  {
+    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
+  }
+
+  exitFunc ('test');
+}