Enable on stack reload in standalone embedder

runtime/vm/object_reload.cc

 // Copyright (c) 2016, 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 "vm/object.h"
 
 #include "vm/isolate_reload.h"
 #include "vm/log.h"
 #include "vm/resolver.h"
 #include "vm/symbols.h"
@@ skipping 405 matching lines @@
   if (is_finalized()) {
     const Error& error =
         Error::Handle(replacement.EnsureIsFinalized(Thread::Current()));
     if (!error.IsNull()) {
       IRC->ReportError(error);
       return false;
     }
     TIR_Print("Finalized replacement class for %s\n", ToCString());
   }
 
+  // At this point the original and replacement must be in the same state.
+  ASSERT(is_finalized() == replacement.is_finalized());
+
   if (is_finalized()) {
     // Get the field maps for both classes. These field maps walk the class
     // hierarchy.
     const Array& fields =
         Array::Handle(OffsetToFieldMap());
     const Array& replacement_fields =
         Array::Handle(replacement.OffsetToFieldMap());
 
     // Check that we have the same number of fields.
     if (fields.Length() != replacement_fields.Length()) {
@@ skipping 103 matching lines @@
     }
     ClearAndSetStaticTarget(new_target);
   } else {
     ClearWithSentinel();
   }
 }
 
 #endif  // !PRODUCT
 
 }   // namespace dart.