diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/newArrayTest.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/newArrayTest.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+function newArrayTest()
+{
+  var a = [];
+  for (var i = 0; i < 10; i++)
+    a[i] = new Array();
+  return a.map(function(x) x.length).toString();
+}
+assertEq(newArrayTest(), "0,0,0,0,0,0,0,0,0,0");