diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/array-length-double.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/array-length-double.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+function getLength(arr) {
+    return arr.length;
+}
+function f() {
+    var arr1 = new Array(10);
+    var arr2 = new Array(4294967295);
+
+    for (var i=0; i<10; i++) {
+	assertEq(getLength(arr1), 10);
+	assertEq(getLength(arr2), 4294967295);
+    }
+}
+f();