POST /client/rsc.x-component / Server 404 / Chrome will loop for ever

[aheissenberger]

Describe the bug

Given is the situation, that a request from client for a rsc.x-component is answered with a 404 from the server.
This can happen in a proxied scenario with overlapping routes.

The code currently does not handle any case where !response.ok or !response.body exists.
Chrome shows the 404 error of the resource on the console and than hangs in an endless loop with a spinning loading symbol not reacting to any user input to stop the loading. Only entering the url input and loading an other page sometimes breaks the loop.

This problem does not exist in other browser: Safari, Firefox.

react-server/packages/react-server/client/ClientProvider.jsx

Lines 681 to 703 in cfd997c

	const component = createFromReadableStream(
	new ReadableStream({
	type: "bytes",
	async start(controller) {
	let response;
	try {
	response = await fetch(srcString, {
	...options.request,
	method: options.method ?? (options.body ? "POST" : "GET"),
	body: options.body,
	headers: {
	...options.request?.headers,
	accept: "text/x-component",
	...(options.noCache && { "Cache-Control": "no-cache" }),
	...(options.prefetch && { "React-Server-Prefetch": "true" }),
	...options.headers,
	},
	credentials: "include",
	signal: abortController?.signal,
	});
	const { body } = response;
	window.dispatchEvent(

Reproduction

No response

Steps to reproduce

1. goto https://d1welhqlw2qcu2.cloudfront.net/client/client in a chrome browser
2. klick on link with label /client/client (dynamic static overlap) in footer

System Info

System:
    OS: macOS 15.7.1
    CPU: (12) arm64 Apple M4 Pro
    Memory: 714.84 MB / 48.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 25.1.0 - /opt/homebrew/bin/node
    npm: 11.6.2 - /opt/homebrew/bin/npm
    pnpm: 9.15.5 - /opt/homebrew/bin/pnpm
  Browsers:
    Chrome: 141.0.7390.123
    Firefox Developer Edition: 142.0
    Safari: 26.0.1
    Safari Technology Preview: 26.0
  npmPackages:
    @lazarv/react-server: workspace:^ => 0.0.0 
    @lazarv/react-server-adapter-aws-lambda: workspace:^ => 0.0.0

Used Package Manager

npm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.

[aheissenberger]

this

[github-actions]

This issue has been locked since it has been closed for more than 30 days.

If you have found a concrete bug or regression related to it, please open a new bug report with a reproduction against the latest version of @lazarv/react-server. If you have any other comments you should create a new discussion.