diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/pic/set-assign.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/pic/set-assign.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+function f() {
+    var o = { a: 555 };
+
+    for (var j = 0; j < 10; ++j) {
+	var i = o.a = 100 + j;
+	assertEq(i, 100 + j);
+    }
+}
+
+f()
\ No newline at end of file