diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/inlining/array-pop.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/inlining/array-pop.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+function f(arr) {
+    var x;
+    for (var i=0; i<100; i++) {
+        x = arr.pop();
+    }
+    return x;
+}
+
+var arr = [];
+for (var i=0; i<130; i++) {
+    arr.push({i: i});
+}
+
+assertEq(f(arr).i, 30);
+assertEq(arr.length, 30);
+assertEq(f(arr), undefined);
+assertEq(arr.length, 0);