diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/propertyOptimize-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/propertyOptimize-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+
+function Foo(x)
+{
+  this.f = x + 10;
+}
+
+var x = new Foo(0);
+assertEq(10, eval("x.f"));
+
+called = false;
+Object.defineProperty(Foo.prototype, 'f', {set: function() { called = true; }});
+
+var y = new Foo(0);
+assertEq(10, eval("x.f"));
+assertEq(undefined, eval("y.f"));
+assertEq(called, true);