diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testWhileObjectOrNull.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testWhileObjectOrNull.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+function testWhileObjectOrNull()
+{
+  try
+  {
+    for (var i = 0; i < 3; i++)
+    {
+      var o = { p: { p: null } };
+      while (o.p)
+        o = o.p;
+    }
+    return "pass";
+  }
+  catch (e)
+  {
+    return "threw exception: " + e;
+  }
+}
+assertEq(testWhileObjectOrNull(), "pass");