diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testArrayPushPop.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testArrayPushPop.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+function testArrayPushPop() {
+    var a = [], sum1 = 0, sum2 = 0;
+    for (var i = 0; i < 10; ++i)
+        sum1 += a.push(i);
+    for (var i = 0; i < 10; ++i)
+        sum2 += a.pop();
+    a.push(sum1);
+    a.push(sum2);
+    return a.join(",");
+}
+assertEq(testArrayPushPop(), "55,45");