diff -r e3c851a14f16 -r 18f3010a358c src/TypeManager.cpp
--- a/src/TypeManager.cpp	Tue Dec 25 18:13:02 2012 -0800
+++ b/src/TypeManager.cpp	Wed Dec 26 17:14:12 2012 -0800
@@ -102,9 +102,12 @@
 }
 
 Type *
-TypeManager::qualify(Handle<Type> type, TypeQualifiers quals)
+TypeManager::qualify(Handle<Type> argType, TypeQualifiers quals)
 {
-    assert(!type->hasTypeQualifiers());
+    Local<Type> type(zone_, argType->unqualified());
+
+    if (!quals)
+        return type;
 
     LookupKey key(type, quals);