diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_7/geniter/gen-with-call-obj.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_7/geniter/gen-with-call-obj.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,36 @@
+var foo;
+
+function gen() {
+    var x = 0;
+    foo = function() { return x++; }
+    for (var i = 0; i < 10; ++i)
+        yield x++;
+}
+
+var j = 0;
+for (i in gen())
+    assertEq(i, j++);
+
+// now mess up the stack
+
+function f1(x) {
+    var a, b, c, d, e, f, g;
+    return x <= 0 ? 0 : f1(x-1);
+}
+f1(10);
+function f2(x) {
+    var a = x, b = x;
+    return x <= 0 ? 0 : f2(x-1);
+}
+f2(10);
+
+// now observe gen's call object (which should have been put)
+
+gc();
+assertEq(foo(), 10);
+gc();
+assertEq(foo(), 11);
+gc();
+assertEq(foo(), 12);
+
+reportCompare(true,true);