correctly invalidate global cells

src/objects-debug.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/disasm.h"
 #include "src/disassembler.h"
 #include "src/heap/objects-visiting.h"
 #include "src/jsregexp.h"
@@ skipping 625 matching lines @@
 
 void Cell::CellVerify() {
   CHECK(IsCell());
   VerifyObjectField(kValueOffset);
 }
 
 
 void PropertyCell::PropertyCellVerify() {
   CHECK(IsPropertyCell());
   VerifyObjectField(kValueOffset);
-  VerifyObjectField(kTypeOffset);
 }
 
 
 void WeakCell::WeakCellVerify() {
   CHECK(IsWeakCell());
   VerifyObjectField(kValueOffset);
   VerifyObjectField(kNextOffset);
 }
 
 
@@ skipping 613 matching lines @@
                          ? it.rinfo()->target_cell()
                          : it.rinfo()->target_object();
     CHECK(!CanLeak(target, heap, skip_weak_cell));
   }
 }
 
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal