Fix to allocation stub invalidation: we cannot just remove it as it will be collected even though c…

runtime/vm/object.h

 // Copyright (c) 2012, 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 1252 matching lines @@
   RawString* GenerateUserVisibleName() const;
   void set_signature_function(const Function& value) const;
   void set_signature_type(const AbstractType& value) const;
   void set_state_bits(intptr_t bits) const;
 
   void set_constants(const Array& value) const;
 
   void set_canonical_types(const Object& value) const;
   RawObject* canonical_types() const;
 
+  RawCode* spare_allocation_stub() const {
+    return raw_ptr()->spare_allocation_stub_;
+  }
+
   RawArray* invocation_dispatcher_cache() const;
   void set_invocation_dispatcher_cache(const Array& cache) const;
   RawFunction* CreateInvocationDispatcher(const String& target_name,
                                           const Array& args_desc,
                                           RawFunction::Kind kind) const;
 
   void CalculateFieldOffsets() const;
 
   // functions_hash_table is in use iff there are at least this many functions.
   static const intptr_t kFunctionLookupHashTreshold = 16;
@@ skipping 6168 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_