Fix d8 object printing (symbols, accessors)

src/d8.js

 // Copyright 2008 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.
 
 "use strict";
 
 String.prototype.startsWith = function (str) {
   if (str.length > this.length) {
     return false;
   }
@@ skipping 1962 matching lines @@
   switch (typeof x) {
     case "undefined":
       return "undefined";
     case "boolean":
     case "number":
     case "function":
       return x.toString();
     case "string":
       return "\"" + x.toString() + "\"";
     case "symbol":
-      return "Symbol(" + (x.name ? Stringify(x.name, depth) : "") + ")"
+      return x.toString();
     case "object":
       if (IS_NULL(x)) return "null";
       if (x.constructor && x.constructor.name === "Array") {
         var elems = [];
         for (var i = 0; i < x.length; ++i) {
           elems.push(
             {}.hasOwnProperty.call(x, i) ? Stringify(x[i], depth - 1) : "");
         }
         return "[" + elems.join(", ") + "]";
       }
       try {
         var string = String(x);
         if (string && string !== "[object Object]") return string;
       } catch(e) {}
       var props = [];
-      for (var name in x) {
+      var names = Object.getOwnPropertyNames(x);
+      if (Object.getOwnPropertySymbols) {
+        // FLAG_harmony_symbols is turned on.
+        names = names.concat(Object.getOwnPropertySymbols(x));
+      }
+      for (var i in names) {
+        var name = names[i];
         var desc = Object.getOwnPropertyDescriptor(x, name);
         if (IS_UNDEFINED(desc)) continue;
+        if (IS_SYMBOL(name)) name = "[" + Stringify(name) + "]";
         if ("value" in desc) {
           props.push(name + ": " + Stringify(desc.value, depth - 1));
         }
-        if ("get" in desc) {
-          var getter = desc.get.toString();
+        if (desc.get) {
+          var getter = Stringify(desc.get);
           props.push("get " + name + getter.slice(getter.indexOf('(')));
         }
-        if ("set" in desc) {
-          var setter = desc.set.toString();
+        if (desc.set) {
+          var setter = Stringify(desc.set);
           props.push("set " + name + setter.slice(setter.indexOf('(')));
         }
       }
       return "{" + props.join(", ") + "}";
     default:
       return "[crazy non-standard shit]";
   }
 }