diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/pic/densearray.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/pic/densearray.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+function f() {
+    var o = [ 1, 2, 3, 4, 5 ];
+
+    for (var i = 6; i < 10; ++i)
+	o.push(i);
+
+    return o;
+}
+
+var o = f();
+
+assertEq(o.join(','), [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ].join(','));
\ No newline at end of file