From b2ba5789d9c633044e50f7ab861ef9e006a0b68f Mon Sep 17 00:00:00 2001
From: Hendrik Liebau <mail@hendrik-liebau.de>
Date: Fri, 9 Aug 2024 11:16:15 +0200
Subject: [PATCH] Prevent regression of resetting `fetch`

---
 test/development/app-dir/dev-fetch-hmr/app/layout.tsx | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/test/development/app-dir/dev-fetch-hmr/app/layout.tsx b/test/development/app-dir/dev-fetch-hmr/app/layout.tsx
index bc8001d092e80b..2a034e34f48ca7 100644
--- a/test/development/app-dir/dev-fetch-hmr/app/layout.tsx
+++ b/test/development/app-dir/dev-fetch-hmr/app/layout.tsx
@@ -4,10 +4,16 @@ import { ReactNode } from 'react'
 const magicNumber = Math.random()
 const originalFetch = globalThis.fetch
 
-globalThis.fetch = async (
+if (originalFetch.name === 'monkeyPatchedFetch') {
+  throw new Error(
+    'Patching over already patched fetch. This creates a memory leak.'
+  )
+}
+
+globalThis.fetch = async function monkeyPatchedFetch(
   resource: URL | RequestInfo,
   options?: RequestInit
-) => {
+) {
   const request = new Request(resource)
 
   if (request.url === 'http://fake.url/secret') {