Disable invalid DCHECK_EQ in serializer.cc

src/serialize.cc

 // Copyright 2012 the V8 project 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 "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
@@ skipping 473 matching lines @@
 RootIndexMap::RootIndexMap(Isolate* isolate) {
   map_ = new HashMap(HashMap::PointersMatch);
   Object** root_array = isolate->heap()->roots_array_start();
   for (int i = 0; i < Heap::kStrongRootListLength; i++) {
     Object* root = root_array[i];
     if (root->IsHeapObject() && !isolate->heap()->InNewSpace(root)) {
       HeapObject* heap_object = HeapObject::cast(root);
       if (LookupEntry(map_, heap_object, false) != NULL) {
         // Some root values are initialized to the empty FixedArray();
         // Do not add them to the map.
-        DCHECK_EQ(isolate->heap()->empty_fixed_array(), heap_object);
+        // TODO(yangguo): This assert is not true. Some roots like
+        // instanceof_cache_answer can be e.g. null.
+        // DCHECK_EQ(isolate->heap()->empty_fixed_array(), heap_object);
       } else {
         SetValue(LookupEntry(map_, heap_object, true), i);
       }
     }
   }
 }
 
 
 class CodeAddressMap: public CodeEventLogger {
  public:
@@ skipping 1971 matching lines @@
   return GetHeaderValue(kNumInternalizedStringsOffset);
 }
 
 Vector<const uint32_t> SerializedCodeData::CodeStubKeys() const {
   int reservations_size = GetHeaderValue(kReservationsOffset) * kInt32Size;
   const byte* start = data_ + kHeaderSize + reservations_size;
   return Vector<const uint32_t>(reinterpret_cast<const uint32_t*>(start),
                                 GetHeaderValue(kNumCodeStubKeysOffset));
 }
 } }  // namespace v8::internal