1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/tests/js1_5/extensions/regress-311583.js b/js/src/tests/js1_5/extensions/regress-311583.js
new file mode 100644
index 000000000..512427cc1
--- /dev/null
+++ b/js/src/tests/js1_5/extensions/regress-311583.js
@@ -0,0 +1,21 @@
+/* -*- 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 = 311583;
+var summary = 'uneval(array) should use elision for holes';
+var actual = '';
+var expect = '';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+var a = new Array(3);
+a[0] = a[2] = 0;
+
+actual = uneval(a);
+expect = '[0, , 0]'; 
+
+reportCompare(expect, actual, summary);