From db6a5f2a317310a6d42cf0fddf999ee2c0d825db Mon Sep 17 00:00:00 2001
From: "Mark S. Miller" <erights@users.noreply.github.com>
Date: Sun, 24 Jul 2022 05:09:29 -0700
Subject: [PATCH] process: use `defineProperty` instead of assignment

PR-URL: https://github.com/nodejs/node/pull/43907
Fixes: https://github.com/nodejs/node/issues/43496
Refs: https://github.com/endojs/endo/issues/576
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>
---
 lib/internal/process/per_thread.js | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/lib/internal/process/per_thread.js b/lib/internal/process/per_thread.js
index 709bcb7b137..f80d0784440 100644
--- a/lib/internal/process/per_thread.js
+++ b/lib/internal/process/per_thread.js
@@ -15,6 +15,7 @@ const {
   Float64Array,
   NumberMAX_SAFE_INTEGER,
   ObjectFreeze,
+  ObjectDefineProperty,
   ReflectApply,
   RegExpPrototypeTest,
   SafeArrayIterator,
@@ -371,9 +372,15 @@ function buildAllowedFlags() {
       return SetPrototypeValues(this[kInternal].set);
     }
   }
-  NodeEnvironmentFlagsSet.prototype.keys =
-  NodeEnvironmentFlagsSet.prototype[SymbolIterator] =
-    NodeEnvironmentFlagsSet.prototype.values;
+  const flagSetValues = NodeEnvironmentFlagsSet.prototype.values;
+  ObjectDefineProperty(NodeEnvironmentFlagsSet.prototype, SymbolIterator, {
+    __proto__: null,
+    value: flagSetValues,
+  });
+  ObjectDefineProperty(NodeEnvironmentFlagsSet.prototype, 'keys', {
+    __proto__: null,
+    value: flagSetValues,
+  });
 
   ObjectFreeze(NodeEnvironmentFlagsSet.prototype.constructor);
   ObjectFreeze(NodeEnvironmentFlagsSet.prototype);