Fix bug in compilation-handlescope.

src/handles.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 943 matching lines @@
     len = Utf8LengthHelper(
         *str, 0, str->length(), false, kRecursionBudget, &failure, &dummy);
     if (failure) FlattenString(str);
   } while (failure);
   return len;
 }
 
 
 DeferredHandleScope::DeferredHandleScope(Isolate* isolate)
     : impl_(isolate->handle_scope_implementer()) {
+  ASSERT(impl_->isolate() == Isolate::Current());
   impl_->BeginDeferredScope();
+  v8::ImplementationUtilities::HandleScopeData* data =
+      impl_->isolate()->handle_scope_data();
   Object** new_next = impl_->GetSpareOrNewBlock();
   Object** new_limit = &new_next[kHandleBlockSize];
+  ASSERT(data->limit == &impl_->blocks()->last()[kHandleBlockSize]);
   impl_->blocks()->Add(new_next);
 
-  v8::ImplementationUtilities::HandleScopeData* data =
-      impl_->isolate()->handle_scope_data();
 #ifdef DEBUG
   prev_level_ = data->level;
 #endif
   data->level++;
   prev_limit_ = data->limit;
   prev_next_ = data->next;
   data->next = new_next;
   data->limit = new_limit;
 }
 
@@ skipping 12 matching lines @@
   data->next = prev_next_;
   data->limit = prev_limit_;
 #ifdef DEBUG
   handles_detached_ = true;
 #endif
   return deferred;
 }
 
 
 } }  // namespace v8::internal