1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/tests/non262/regress/regress-254296.js b/js/src/tests/non262/regress/regress-254296.js
new file mode 100644
index 0000000000..041c3876c9
--- /dev/null
+++ b/js/src/tests/non262/regress/regress-254296.js
@@ -0,0 +1,26 @@
+/* -*- 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/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 254296;
+var summary = 'javascript regular expression negative lookahead';
+var actual = '';
+var expect = '';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+expect = [3].toString();
+actual = /^\d(?!\.\d)/.exec('3.A');
+if (actual)
+{
+  actual = actual.toString();
+}
+ 
+reportCompare(expect, actual, summary + ' ' + inSection(1));
+
+expect = 'AB';
+actual = /(?!AB+D)AB/.exec("AB") + '';
+reportCompare(expect, actual, summary + ' ' + inSection(2));