From 9237f78d08e4fb1e3ee98dc3ccc814718601aad8 Mon Sep 17 00:00:00 2001
From: Damien Elmes <dae@users.noreply.github.com>
Date: Mon, 6 Sep 2021 20:57:37 +1000
Subject: [PATCH] Merge pull request #1354 from hgiesel/preventoverwrite

Disallow setting, deleting or defining properties on packages
---
 ts/lib/register-package.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ts/lib/register-package.ts b/ts/lib/register-package.ts
index d4f926000..62eaf3042 100644
--- a/ts/lib/register-package.ts
+++ b/ts/lib/register-package.ts
@@ -3,6 +3,8 @@
 
 import { runtimeLibraries } from "./runtime-require";
 
+const prohibit = () => false;
+
 export function registerPackage(
     name: string,
     entries: Record<string, unknown>,
@@ -10,6 +12,9 @@ export function registerPackage(
 ): void {
     const pack = deprecation
         ? new Proxy(entries, {
+              set: prohibit,
+              defineProperty: prohibit,
+              deleteProperty: prohibit,
               get: (target, name: string) => {
                   if (name in deprecation) {
                       console.log(`anki: ${name} is deprecated: ${deprecation[name]}`);