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diff --git a/js/src/tests/non262/RegExp/regress-78156.js b/js/src/tests/non262/RegExp/regress-78156.js
new file mode 100644
index 0000000000..01ef647638
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+++ b/js/src/tests/non262/RegExp/regress-78156.js
@@ -0,0 +1,87 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+/*
+ * Date: 06 February 2001
+ *
+ * SUMMARY:  Arose from Bugzilla bug 78156:
+ * "m flag of regular expression does not work with $"
+ *
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=78156
+ *
+ * The m flag means a regular expression should search strings
+ * across multiple lines, i.e. across '\n', '\r'.
+ */
+//-----------------------------------------------------------------------------
+var i = 0;
+var BUGNUMBER = 78156;
+var summary = 'Testing regular expressions with  ^, $, and the m flag -';
+var status = '';
+var statusmessages = new Array();
+var pattern = '';
+var patterns = new Array();
+var string = '';
+var strings = new Array();
+var actualmatch = '';
+var actualmatches = new Array();
+var expectedmatch = '';
+var expectedmatches = new Array();
+
+/*
+ * All patterns have an m flag; all strings are multiline.
+ * Looking for digit characters at beginning/end of lines.
+ */
+
+string = 'aaa\n789\r\nccc\r\n345';
+status = inSection(1);
+pattern = /^\d/gm;
+actualmatch = string.match(pattern);
+expectedmatch = ['7','3'];
+addThis();
+
+status = inSection(2);
+pattern = /\d$/gm;
+actualmatch = string.match(pattern);
+expectedmatch = ['9','5'];
+addThis();
+
+string = 'aaa\n789\r\nccc\r\nddd';
+status = inSection(3);
+pattern = /^\d/gm;
+actualmatch = string.match(pattern);
+expectedmatch = ['7'];
+addThis();
+
+status = inSection(4);
+pattern = /\d$/gm;
+actualmatch = string.match(pattern);
+expectedmatch = ['9'];
+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);
+}