Temporarily CHECK use after free in Value

base/values.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/values.h"
 
 #include <string.h>
 
 #include <algorithm>
 #include <cmath>
@@ skipping 182 matching lines @@
       InternalCleanup();
       InternalMoveConstructFrom(std::move(that));
     }
   }
 
   return *this;
 }
 
 Value::~Value() {
   InternalCleanup();
+  alive_ = false;
 }
 
 // static
 const char* Value::GetTypeName(Value::Type type) {
   DCHECK_GE(static_cast<int>(type), 0);
   DCHECK_LT(static_cast<size_t>(type), arraysize(kTypeNames));
   return kTypeNames[static_cast<size_t>(type)];
 }
 
 bool Value::GetBool() const {
@@ skipping 369 matching lines @@
     case Type::DICTIONARY:
       *dict_ptr_ = std::move(*that.dict_ptr_);
       return;
     case Type::LIST:
       *list_ = std::move(*that.list_);
       return;
   }
 }
 
 void Value::InternalCleanup() {
+  CHECK(alive_);
+
   switch (type_) {
     case Type::NONE:
     case Type::BOOLEAN:
     case Type::INTEGER:
     case Type::DOUBLE:
       // Nothing to do
       return;
 
     case Type::STRING:
       string_value_.Destroy();
@@ skipping 753 matching lines @@
 }
 
 std::ostream& operator<<(std::ostream& out, const Value::Type& type) {
   if (static_cast<int>(type) < 0 ||
       static_cast<size_t>(type) >= arraysize(kTypeNames))
     return out << "Invalid Type (index = " << static_cast<int>(type) << ")";
   return out << Value::GetTypeName(type);
 }
 
 }  // namespace base