[runtime] Pass in receiver as target to the LookupIterator if known to be JSReceiver

src/contexts.cc

 // Copyright 2011 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/contexts.h"
 
 #include "src/ast/scopeinfo.h"
 #include "src/bootstrapper.h"
 #include "src/debug/debug.h"
 #include "src/isolate-inl.h"
@@ skipping 273 matching lines @@
       // to only do a local lookup for context extension objects.
       Maybe<PropertyAttributes> maybe = Nothing<PropertyAttributes>();
       if ((flags & FOLLOW_PROTOTYPE_CHAIN) == 0 ||
           object->IsJSContextExtensionObject()) {
         maybe = JSReceiver::GetOwnPropertyAttributes(object, name);
       } else if (context->IsWithContext()) {
         // A with context will never bind "this".
         if (name->Equals(*isolate->factory()->this_string())) {
           maybe = Just(ABSENT);
         } else {
-          LookupIterator it(object, name);
+          LookupIterator it(object, name, object);
           Maybe<bool> found = UnscopableLookup(&it);
           if (found.IsNothing()) {
             maybe = Nothing<PropertyAttributes>();
           } else {
             // Luckily, consumers of |maybe| only care whether the property
             // was absent or not, so we can return a dummy |NONE| value
             // for its attributes when it was present.
             maybe = Just(found.FromJust() ? NONE : ABSENT);
           }
         }
@@ skipping 275 matching lines @@
 
   int previous_value = errors_thrown()->value();
   set_errors_thrown(Smi::FromInt(previous_value + 1));
 }
 
 
 int Context::GetErrorsThrown() { return errors_thrown()->value(); }
 
 }  // namespace internal
 }  // namespace v8