diff -r 3ac2a36a7a0c -r cf82769eb136 src/TypeManager.cpp
--- a/src/TypeManager.cpp	Sun Aug 05 14:19:19 2012 -0700
+++ b/src/TypeManager.cpp	Sun Aug 05 15:38:52 2012 -0700
@@ -39,6 +39,10 @@
     if (!voidType_)
         return false;
 
+    uncheckedType_ = Type::NewUnchecked(zone_);
+    if (!uncheckedType_)
+        return false;
+
     if ((primitiveTypes_[PrimitiveType_Int32] = Type::NewPrimitive(zone_, PrimitiveType_Int32)) == NULL)
         return false;
     if ((primitiveTypes_[PrimitiveType_Float] = Type::NewPrimitive(zone_, PrimitiveType_Float)) == NULL)
@@ -107,6 +111,7 @@
 TypeManager::accept(VirtualObjectVisitor *visitor)
 {
     visitor->visit(voidType_.address());
+    visitor->visit(uncheckedType_.address());
     for (unsigned i = 0; i < PrimitiveTypes_Total; i++) {
         visitor->visit(primitiveTypes_[i].address());
         visitor->visit(referenceTypes_[i].address());