From aab0d202f8edb079070f417ab4b35678ac937608 Mon Sep 17 00:00:00 2001
From: Nemanja Stojanovic <me@nem035.com>
Date: Tue, 28 Feb 2017 13:58:56 -0500
Subject: [PATCH] util: convert inspect.styles and inspect.colors to
 prototype-less objects

Use a prototype-less object for inspect.styles and inspect.colors to allow
modification of Object.prototype in the REPL.

Fixes: https://github.com/nodejs/node/issues/11614
PR-URL: https://github.com/nodejs/node/pull/11624
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
---
 lib/util.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/util.js b/lib/util.js
index 1ee96c1c84b..7e8d23d55e6 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -166,7 +166,7 @@ Object.defineProperty(inspect, 'defaultOptions', {
 });
 
 // http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
-inspect.colors = {
+inspect.colors = Object.assign(Object.create(null), {
   'bold': [1, 22],
   'italic': [3, 23],
   'underline': [4, 24],
@@ -180,10 +180,10 @@ inspect.colors = {
   'magenta': [35, 39],
   'red': [31, 39],
   'yellow': [33, 39]
-};
+});
 
 // Don't use 'blue' not visible on cmd.exe
-inspect.styles = {
+inspect.styles = Object.assign(Object.create(null), {
   'special': 'cyan',
   'number': 'yellow',
   'boolean': 'yellow',
@@ -194,7 +194,7 @@ inspect.styles = {
   'date': 'magenta',
   // "name": intentionally not styling
   'regexp': 'red'
-};
+});
 
 const customInspectSymbol = internalUtil.customInspectSymbol;