Allocate instance closures similarly to regular closures, i.e. without a

runtime/vm/raw_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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 621 matching lines @@
 class RawClosureData : public RawObject {
  private:
   RAW_HEAP_OBJECT_IMPLEMENTATION(ClosureData);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->context_scope_);
   }
   RawContextScope* context_scope_;
   RawFunction* parent_function_;  // Enclosing function of this local function.
   RawClass* signature_class_;
-  union {
-    RawInstance* closure_;  // Closure object for static implicit closures.
-    RawCode* closure_allocation_stub_;  // Stub code for allocation of closures.
-  };
+  RawInstance* closure_;  // Closure object for static implicit closures.
   RawObject** to() {
-    return reinterpret_cast<RawObject**>(&ptr()->closure_allocation_stub_);
+    return reinterpret_cast<RawObject**>(&ptr()->closure_);
   }
 };
 
 
 class RawRedirectionData : public RawObject {
  private:
   RAW_HEAP_OBJECT_IMPLEMENTATION(RedirectionData);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->type_);
@@ skipping 1113 matching lines @@
   // Make sure this is updated when new TypedData types are added.
   ASSERT(kTypedDataInt8ArrayViewCid == kTypedDataInt8ArrayCid + 14);
   ASSERT(kExternalTypedDataInt8ArrayCid == kTypedDataInt8ArrayViewCid + 15);
   ASSERT(kNullCid == kExternalTypedDataInt8ArrayCid + 14);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_