Invalid source URL: first path segment in URL cannot contain colon

[kaishin]

Which Cloudflare product(s) does this pertain to?

Wrangler

What versions & operating system are you using?

Wrangler 4.13.2

Please provide a link to a minimal reproduction

No response

Describe the Bug

When running the wrangler pages dev command in a freshly created Astro project using the command from the docs pnpm create cloudflare@latest my-astro-app --framework=astro --platform=pages, the following warning is displayed on the terminal console:

▲ [WARNING] Invalid source URL: first path segment in URL cannot contain colon [invalid-source-url]

Please provide any relevant error logs

> astro build && wrangler pages dev

11:54:21 [@astrojs/cloudflare] Enabling sessions with Cloudflare KV. Be sure to define a KV binding named "SESSION".
11:54:21 [@astrojs/cloudflare] If you see the error "Invalid binding `SESSION`" in your build output, you need to add the binding to your wrangler config file.
11:54:21 [WARN] [@astrojs/cloudflare] [@astrojs/cloudflare] This adapter is intended to be used with server rendered pages, which this project does not contain any of. As such, this adapter is unnecessary.
11:54:21 [WARN] [config] The adapter @astrojs/cloudflare has limited support for "sharp". Certain features may not work as expected.
11:54:21 [WARN] [adapter] Cloudflare does not support sharp. You can use the `compile` image service to compile images at build time. It will not work for any on-demand rendered images.
11:54:22 [content] Syncing content
11:54:22 [content] Synced content
11:54:22 [types] Generated 193ms
11:54:22 [build] output: "static"
11:54:22 [build] mode: "server"
11:54:22 [build] directory: <REDACTED>/my-astro-app/dist/
11:54:22 [build] adapter: @astrojs/cloudflare
11:54:22 [build] Collecting build info...
11:54:22 [build] ✓ Completed in 200ms.
11:54:22 [build] Building server entrypoints...
11:54:22 [vite] ✓ built in 420ms
11:54:22 [build] ✓ Completed in 437ms.

 prerendering static routes 
11:54:22 ▶ src/pages/index.astro
11:54:22   └─ /index.html (+8ms) 
11:54:22 ✓ Completed in 13ms.

11:54:22 [build] Rearranging server assets...
11:54:22 [build] Server built in 657ms
11:54:22 [build] Complete!

 ⛅️ wrangler 4.13.2
-------------------

Attaching additional modules:
┌────────────────────────────────────────────────┬──────┬────────────┐
│ Name                                           │ Type │ Size       │
├────────────────────────────────────────────────┼──────┼────────────┤
│ _@astrojs-ssr-adapter.mjs                      │ esm  │ 0.14 KiB   │
├────────────────────────────────────────────────┼──────┼────────────┤
│ _astro-internal_middleware.mjs                 │ esm  │ 0.45 KiB   │
├────────────────────────────────────────────────┼──────┼────────────┤
│ _noop-actions.mjs                              │ esm  │ 0.09 KiB   │
├────────────────────────────────────────────────┼──────┼────────────┤
│ chunks/_@astrojs-ssr-adapter_Bvx2VUxS.mjs      │ esm  │ 33.82 KiB  │
├────────────────────────────────────────────────┼──────┼────────────┤
│ chunks/astro/server_B6Baf3Xl.mjs               │ esm  │ 99.70 KiB  │
├────────────────────────────────────────────────┼──────┼────────────┤
│ chunks/astro-designed-error-pages_DHwfIjJN.mjs │ esm  │ 45.85 KiB  │
├────────────────────────────────────────────────┼──────┼────────────┤
│ chunks/cloudflare-kv-binding_DMly_2Gl.mjs      │ esm  │ 2.94 KiB   │
├────────────────────────────────────────────────┼──────┼────────────┤
│ chunks/index_BmUPEGiE.mjs                      │ esm  │ 97.68 KiB  │
├────────────────────────────────────────────────┼──────┼────────────┤
│ chunks/noop-middleware_CLzGysKN.mjs            │ esm  │ 0.33 KiB   │
├────────────────────────────────────────────────┼──────┼────────────┤
│ manifest_BcNTIjza.mjs                          │ esm  │ 7.74 KiB   │
├────────────────────────────────────────────────┼──────┼────────────┤
│ pages/index.astro.mjs                          │ esm  │ 0.06 KiB   │
├────────────────────────────────────────────────┼──────┼────────────┤
│ renderers.mjs                                  │ esm  │ 0.10 KiB   │
├────────────────────────────────────────────────┼──────┼────────────┤
│ Total (12 modules)                             │      │ 288.90 KiB │
└────────────────────────────────────────────────┴──────┴────────────┘
✨ Compiled Worker successfully
No bindings found.
▲ [WARNING] Invalid source URL: first path segment in URL cannot contain colon [invalid-source-url]

    .wrangler/tmp/pages-TV5wRq/hisio8esmg6.js.map:3:14:
      3 │   "sources": ["<define:__ROUTES__>", "../../../node_modules/.pnpm/w...
        ╵               ~~~~~~~~~~~~~~~~~~~~~

  The source map ".wrangler/tmp/pages-TV5wRq/hisio8esmg6.js.map" was referenced by the file ".wrangler/tmp/pages-TV5wRq/hisio8esmg6.js" here:

    .wrangler/tmp/pages-TV5wRq/hisio8esmg6.js:42:21:
      42 │ //# sourceMappingURL=hisio8esmg6.js.map
         ╵                      ~~~~~~~~~~~~~~~~~~


⎔ Starting local server...
[wrangler:inf] Ready on http://localhost:8788

[petebacondarwin]

I can confirm that this happens... will investigate.

[ErikAbele]

Same happening here with a freshly created Next app.

[petebacondarwin]

This appears to be a regression with our update to esbuild #8890

When generating the temporary build of a Pages project wrangler pages dev injects a __ROUTES__ define, which results in code that looks like this:

// <define:__ROUTES__>
var define_ROUTES_default = {
  version: 1,
  include: [
    "/*"
  ],
  exclude: [
    "/",
    "/_astro/*",
    "/favicon.svg"
  ]
};

Further the source map for this file has a sources entry:

{
  "version": 3,
  "sources": ["<define:__ROUTES__>", "...

Wrangler then runs a second instance of esbuild for the actual wrangler pages dev process.

In previous versions of esbuild this was no problem but in esbuild 0.25, these are now parsed as URLs and it thinks that <define:__ROUTES__> is the path segment of a URL, which is not allowed.

[petebacondarwin]

Just to be clear on the impact here, this is only printing a warning. Everything else is still working as expected.

[ErikAbele]

Yes, just a warning and AFAICS everything else is working as expected here.

[vicb]

See evanw/esbuild#4169

[petebacondarwin]

This has been fixed upstream in esbuild 0.25.4: https://github.com/evanw/esbuild/blob/main/CHANGELOG.md#0254.
I'll bump our dependency and then close this.