diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/arrayProto.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/arrayProto.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+
+for (var i = 0; i < 15; i++) {
+  var x = Object.create([]);
+  assertEq(x.length, 0);
+}
+
+for (var i = 0; i < 15; i++) {
+  function foo() {}
+  foo.prototype = [];
+  var x = new foo();
+  assertEq(x.length, 0);
+}