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diff --git a/js/src/tests/non262/extensions/regress-228087.js b/js/src/tests/non262/extensions/regress-228087.js
new file mode 100644
index 0000000000..c0b1661752
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+++ b/js/src/tests/non262/extensions/regress-228087.js
@@ -0,0 +1,316 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 4 -*-
+/* 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/. */
+
+/*
+ *
+ * Date:    12 December 2003
+ * SUMMARY: Testing regexps with unescaped braces
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=228087
+ *
+ * Note: unbalanced, unescaped braces are not permitted by ECMA-262 Ed.3,
+ * but we decided to follow Perl and IE and allow this for compatibility.
+ *
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=188206 and its testcase.
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=223273 and its testcase.
+ */
+//-----------------------------------------------------------------------------
+var i = 0;
+var BUGNUMBER = 228087;
+var summary = 'Testing regexps with unescaped braces';
+var status = '';
+var statusmessages = new Array();
+var pattern = '';
+var patterns = new Array();
+var string = '';
+var strings = new Array();
+var actualmatch = '';
+var actualmatches = new Array();
+var expectedmatch = '';
+var expectedmatches = new Array();
+var e;
+
+
+string = 'foo {1} foo {2} foo';
+
+// try an example with the braces escaped
+status = inSection(1);
+try
+{
+  pattern = new RegExp('\{1.*\}', 'g');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('{1} foo {2}');
+addThis();
+
+// just like Section 1, without the braces being escaped
+status = inSection(2);
+try
+{
+  pattern = new RegExp('{1.*}', 'g');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('{1} foo {2}');
+addThis();
+
+// try an example with the braces escaped
+status = inSection(3);
+try
+{
+  pattern = new RegExp('\{1[.!\}]*\}', 'g');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('{1}');
+addThis();
+
+// just like Section 3, without the braces being escaped
+status = inSection(4);
+try
+{
+  pattern = new RegExp('{1[.!}]*}', 'g');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('{1}');
+addThis();
+
+
+string = 'abccccc{3 }c{ 3}c{3, }c{3 ,}c{3 ,4}c{3, 4}c{3,4 }de';
+
+// use braces in a normal quantifier construct
+status = inSection(5);
+try
+{
+  pattern = new RegExp('c{3}');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('ccc');
+addThis();
+
+// now disrupt the quantifer - the braces should now be interpreted literally
+status = inSection(6);
+try
+{
+  pattern = new RegExp('c{3 }');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('c{3 }');
+addThis();
+
+status = inSection(7);
+try
+{
+  pattern = new RegExp('c{3.}');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('c{3 }');
+addThis();
+
+status = inSection(8);
+try
+{
+  // need to escape the \ in \s since
+  // this has been converted to a constructor call
+  // instead of a literal regexp
+  pattern = new RegExp('c{3\\s}');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('c{3 }');
+addThis();
+
+status = inSection(9);
+try
+{
+  pattern = new RegExp('c{3[ ]}');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('c{3 }');
+addThis();
+
+status = inSection(10);
+try
+{
+  pattern = new RegExp('c{ 3}');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('c{ 3}');
+addThis();
+
+// using braces in a normal quantifier construct again
+status = inSection(11);
+try
+{
+  pattern = new RegExp('c{3,}');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('ccccc');
+addThis();
+
+// now disrupt it - the braces should now be interpreted literally
+status = inSection(12);
+try
+{
+  pattern = new RegExp('c{3, }');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('c{3, }');
+addThis();
+
+status = inSection(13);
+try
+{
+  pattern = new RegExp('c{3 ,}');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('c{3 ,}');
+addThis();
+
+// using braces in a normal quantifier construct again
+status = inSection(14);
+try
+{
+  pattern = new RegExp('c{3,4}');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('cccc');
+addThis();
+
+// now disrupt it - the braces should now be interpreted literally
+status = inSection(15);
+try
+{
+  pattern = new RegExp('c{3 ,4}');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('c{3 ,4}');
+addThis();
+
+status = inSection(16);
+try
+{
+  pattern = new RegExp('c{3, 4}');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('c{3, 4}');
+addThis();
+
+status = inSection(17);
+try
+{
+  pattern = new RegExp('c{3,4 }');
+  actualmatch = string.match(pattern);
+}
+catch (e)
+{
+  pattern = 'error';
+  actualmatch = '';
+}
+expectedmatch = Array('c{3,4 }');
+addThis();
+
+
+
+
+//-------------------------------------------------------------------------------------------------
+test();
+//-------------------------------------------------------------------------------------------------
+
+
+
+function addThis()
+{
+  statusmessages[i] = status;
+  patterns[i] = pattern;
+  strings[i] = string;
+  actualmatches[i] = actualmatch;
+  expectedmatches[i] = expectedmatch;
+  i++;
+}
+
+
+function test()
+{
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+  testRegExp(statusmessages, patterns, strings, actualmatches, expectedmatches);
+}