Skip stack trace formatting in case the global object is already dead.

src/json-stringifier.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 542 matching lines @@
         property = GetProperty(object, key);
         if (property.is_null()) return EXCEPTION;
       }
       Result result = SerializeProperty(property, comma, key);
       if (!comma && result == SUCCESS) comma = true;
       if (result >= EXCEPTION) return result;
     }
   } else {
     bool has_exception = false;
     Handle<FixedArray> contents =
-        GetKeysInFixedArrayFor(object, LOCAL_ONLY, &has_exception);
+        GetKeysInFixedArrayFor<true>(object, LOCAL_ONLY, &has_exception);
     if (has_exception) return EXCEPTION;
 
     for (int i = 0; i < contents->length(); i++) {
       Object* key = contents->get(i);
       Handle<String> key_handle;
       Handle<Object> property;
       if (key->IsString()) {
         key_handle = Handle<String>(String::cast(key), isolate_);
         property = GetProperty(object, key_handle);
       } else {
@@ skipping 162 matching lines @@
       SerializeString_<false, uint8_t>(object);
     } else {
       SerializeString_<false, uc16>(object);
     }
   }
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSON_STRINGIFIER_H_