Error.captureStackTrace should define "stack" property as configurable.

src/messages.js

 // 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.
 
 // -------------------------------------------------------------------
 
 var kMessages = {
   // Error
   cyclic_proto:                  ["Cyclic __proto__ value"],
   code_gen_from_strings:         ["%0"],
@@ skipping 1126 matching lines @@
     SET_PRIVATE(this, formatted_stack_trace_symbol, v);
   }
 };
 
 
 // Use a dummy function since we do not actually want to capture a stack trace
 // when constructing the initial Error prototytpes.
 var captureStackTrace = function captureStackTrace(obj, cons_opt) {
   // Define accessors first, as this may fail and throw.
   ObjectDefineProperty(obj, 'stack', { get: StackTraceGetter,
-                                       set: StackTraceSetter});
+                                       set: StackTraceSetter,
+                                       configurable: true });
   %CollectStackTrace(obj, cons_opt ? cons_opt : captureStackTrace);
 }
 
 
 function SetUpError() {
   // Define special error type constructors.
 
   var DefineError = function(f) {
     // Store the error function in both the global object
     // and the runtime object. The function is fetched
@@ skipping 123 matching lines @@
 function SetUpStackOverflowBoilerplate() {
   var boilerplate = MakeRangeError('stack_overflow', []);
 
   %DefineAccessorPropertyUnchecked(
       boilerplate, 'stack', StackTraceGetter, StackTraceSetter, DONT_ENUM);
 
   return boilerplate;
 }
 
 var kStackOverflowBoilerplate = SetUpStackOverflowBoilerplate();