From d87b64767ce6c0f362f164090fb86a8759f60025 Mon Sep 17 00:00:00 2001
From: Ruben Bridgewater <ruben@bridgewater.de>
Date: Thu, 13 Jun 2019 17:35:29 +0200
Subject: [PATCH] process: hide NodeEnvironmentFlagsSet's `add` function

This makes sure that the `add` function is not visible by default
when inspecting `process.allowedNodeEnvironmentFlags`.
---
 lib/internal/process/per_thread.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/internal/process/per_thread.js b/lib/internal/process/per_thread.js
index 35e861df2b73f9..2204d7223bf344 100644
--- a/lib/internal/process/per_thread.js
+++ b/lib/internal/process/per_thread.js
@@ -263,7 +263,9 @@ function buildAllowedFlags() {
 
       // The super constructor consumes `add`, but
       // disallow any future adds.
-      this.add = () => this;
+      Object.defineProperty(this, 'add', {
+        value: () => this
+      });
     }
 
     delete() {