From adf7a30ec0dfd893517ee3a8abb9a9b28a836720 Mon Sep 17 00:00:00 2001
From: Vincent Voyer <vincent@codeagain.com>
Date: Fri, 13 Mar 2020 10:07:37 +0100
Subject: [PATCH] fix(debugging): do not pass NODE_OPTIONS='--inspect' to
 subprocesses

fixes #11030
---
 packages/next/server/next-dev-server.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/packages/next/server/next-dev-server.ts b/packages/next/server/next-dev-server.ts
index a8450ca036891b..7dd9fb5c84fac2 100644
--- a/packages/next/server/next-dev-server.ts
+++ b/packages/next/server/next-dev-server.ts
@@ -85,6 +85,16 @@ export default class DevServer extends Server {
       {
         maxRetries: 0,
         numWorkers: this.nextConfig.experimental.cpus,
+        forkOptions: {
+          env: {
+            ...process.env,
+            // discard process.env.NODE_OPTIONS --inspect flag otherwise two debuggers are started in inspect
+            // mode when users will try to debug their Next.js application with NODE_OPTIONS='--inspect' next dev
+            NODE_OPTIONS: process.env.NODE_OPTIONS
+              ? process.env.NODE_OPTIONS.replace('--inspect', '')
+              : '',
+          },
+        },
       }
     ) as Worker & {
       loadStaticPaths: typeof import('./static-paths-worker').loadStaticPaths