diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/getprop-constant.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/getprop-constant.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// |jit-test| error: TypeError
+
+/* GETPROP of a known constant where the lvalue may not be an object. */
+
+function foo(ox) {
+  var x = ox;
+  var n = 0;
+  for (var i = 0; i < 90; i++) {
+    n += x.f.g;
+    if (i >= 80)
+      x = undefined;
+  }
+  print(n);
+}
+var n = 1;
+function f() {}
+function g() {}
+g.g = 1;
+f.prototype = {f:g};
+foo(new f());