Set Error.stack property writable

src/builtins/builtins-error.cc

 // Copyright 2016 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/builtins/builtins.h"
 #include "src/builtins/builtins-utils.h"
 
 #include "src/bootstrapper.h"
 #include "src/messages.h"
 #include "src/property-descriptor.h"
@@ skipping 35 matching lines @@
       isolate->CaptureSimpleStackTrace(object, mode, caller);
   if (!stack_trace->IsJSArray()) return *isolate->factory()->undefined_value();
 
   Handle<Object> formatted_stack_trace;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, formatted_stack_trace,
       FormatStackTrace(isolate, object, stack_trace));
 
   PropertyDescriptor desc;
   desc.set_configurable(true);
+  desc.set_writable(true);
   desc.set_value(formatted_stack_trace);
   Maybe<bool> status = JSReceiver::DefineOwnProperty(
       isolate, object, isolate->factory()->stack_string(), &desc,
       Object::THROW_ON_ERROR);
   if (!status.IsJust()) return isolate->heap()->exception();
   CHECK(status.FromJust());
   return isolate->heap()->undefined_value();
 }
 
 namespace {
@@ skipping 56 matching lines @@
   // the code unit 0x0020 (SPACE), and msg.
   IncrementalStringBuilder builder(isolate);
   builder.AppendString(name);
   builder.AppendCString(": ");
   builder.AppendString(msg);
   RETURN_RESULT_OR_FAILURE(isolate, builder.Finish());
 }
 
 }  // namespace internal
 }  // namespace v8