diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug642985-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug642985-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+function f(N)
+{
+        for (var i = 0; i != N; ++i) {
+                var obj1 = {}, obj2 = {};
+                obj1['a'+i] = 0;
+                obj2['b'+i] = 0;
+                for (var repeat = 0;repeat != 2; ++repeat) {
+                        for (var j in obj1) {
+                                for (var k in obj2) {
+                                        gc();
+                                }
+                        }
+                }
+        }
+}
+var array = [function() { f(10); },
+    function(array) { f(50); },
+    function() { propertyIsEnumerable.call(undefined, {}); },
+    ];
+try {
+  for (var i = 0; i != array.length; ++i)
+    array[i]();
+} catch (e) {}