Properly handle holes following spreads in array literals

src/runtime/runtime-object.cc

 // Copyright 2014 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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/bootstrapper.h"
 #include "src/debug/debug.h"
 #include "src/isolate-inl.h"
@@ skipping 400 matching lines @@
                                         object, index, value, NONE));
 }
 
 
 RUNTIME_FUNCTION(Runtime_AppendElement) {
   HandleScope scope(isolate);
   DCHECK_EQ(2, args.length());
 
   CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, value, 1);
+  CHECK(!value->IsTheHole(isolate));
 
   uint32_t index;
   CHECK(array->length()->ToArrayIndex(&index));
 
   RETURN_FAILURE_ON_EXCEPTION(
       isolate, JSObject::AddDataElement(array, index, value, NONE));
   JSObject::ValidateElements(array);
   return *array;
 }
 
@@ skipping 491 matching lines @@
       isolate, o, key, &success, LookupIterator::OWN);
   if (!success) return isolate->heap()->exception();
   MAYBE_RETURN(
       JSReceiver::CreateDataProperty(&it, value, Object::THROW_ON_ERROR),
       isolate->heap()->exception());
   return *value;
 }
 
 }  // namespace internal
 }  // namespace v8