diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug885660.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug885660.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+function ff(parsedTypeName, defaultContext) {
+    var context = null;
+
+    if (context === null)
+        context = defaultContext;
+
+    if (parsedTypeName.genericArguments !== null) {
+        for (var i = 0; i < 0; i++) {}
+    }
+
+    var foo = parsedTypeName.type;
+    assertEq(typeof context, "object");
+    return foo;
+}
+function test() {
+    var parsedTypeName = {genericArguments: null};
+    for (var i=0; i<140; i++) {
+        if (i > 100)
+            parsedTypeName.x = {};
+        ff(parsedTypeName, {});
+    }
+}
+test();