- Modify toDart to first do a simple lookup in the appropriate table before going down the templati…

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
@@ skipping 106 matching lines @@
 
 
 PersistentHandle* Api::UnwrapAsPersistentHandle(Dart_PersistentHandle object) {
   ASSERT(Isolate::Current()->api_state()->IsValidPersistentHandle(object));
   return reinterpret_cast<PersistentHandle*>(object);
 }
 
 
 FinalizablePersistentHandle* Api::UnwrapAsWeakPersistentHandle(
     Dart_WeakPersistentHandle object) {
-  ASSERT(Isolate::Current()->api_state()->IsValidWeakPersistentHandle(object));
+  ASSERT(Isolate::Current()->api_state()->IsValidWeakPersistentHandle(object) ||
+         Isolate::Current()->api_state()->
+             IsValidPrologueWeakPersistentHandle(object));
   return reinterpret_cast<FinalizablePersistentHandle*>(object);
 }
 
 
 FinalizablePersistentHandle* Api::UnwrapAsPrologueWeakPersistentHandle(
     Dart_WeakPersistentHandle object) {
   ASSERT(Isolate::Current()->api_state()->IsValidPrologueWeakPersistentHandle(
       object));
   return reinterpret_cast<FinalizablePersistentHandle*>(object);
 }
@@ skipping 4199 matching lines @@
   }
   {
     NoGCScope no_gc;
     RawObject* raw_obj = obj.raw();
     isolate->heap()->SetPeer(raw_obj, peer);
   }
   return Api::Success();
 }
 
 }  // namespace dart