Use return value of GetPropertyAttributes to make compiler happy.

src/runtime.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 <stdlib.h>
 #include <limits>
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 5233 matching lines @@
   RUNTIME_ASSERT(
       (unchecked_attributes & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0);
   // Compute attributes.
   PropertyAttributes attributes =
       static_cast<PropertyAttributes>(unchecked_attributes);
 
 #ifdef DEBUG
   uint32_t index = 0;
   ASSERT(!key->ToArrayIndex(&index));
   LookupIterator it(object, key, LookupIterator::CHECK_OWN_REAL);
-  JSReceiver::GetPropertyAttributes(&it);
+  Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it);
+  ASSERT(maybe.has_value);
   RUNTIME_ASSERT(!it.IsFound());
 #endif
 
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, result,
       JSObject::SetOwnPropertyIgnoreAttributes(object, key, value, attributes));
   return *result;
 }
 
@@ skipping 10 matching lines @@
       (unchecked_attributes & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0);
   // Compute attributes.
   PropertyAttributes attributes =
       static_cast<PropertyAttributes>(unchecked_attributes);
 
 #ifdef DEBUG
   bool duplicate;
   if (key->IsName()) {
     LookupIterator it(object, Handle<Name>::cast(key),
                       LookupIterator::CHECK_OWN_REAL);
-    JSReceiver::GetPropertyAttributes(&it);
+    Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it);
+    ASSERT(maybe.has_value);
     duplicate = it.IsFound();
   } else {
     uint32_t index = 0;
     RUNTIME_ASSERT(key->ToArrayIndex(&index));
     Maybe<bool> maybe = JSReceiver::HasOwnElement(object, index);
     if (!maybe.has_value) return isolate->heap()->exception();
     duplicate = maybe.value;
   }
   if (duplicate) {
     Handle<Object> args[1] = { key };
@@ skipping 9722 matching lines @@
   }
   return NULL;
 }
 
 
 const Runtime::Function* Runtime::FunctionForId(Runtime::FunctionId id) {
   return &(kIntrinsicFunctions[static_cast<int>(id)]);
 }
 
 } }  // namespace v8::internal