fix: dev toolbar throwing SourceMapConsumer import error on every dev page load

[adipascu]

PR Checklist

Please check if your PR fulfills the following requirements:

• Addresses an existing open issue: fixes #000
• Tests for the changes have been added (for bug fixes / features)

What is the current behavior?

With the dev toolbar enabled, every dev page load throws:

The requested module '/@fs/.../source-map-js/source-map.js' does not provide an export named 'SourceMapConsumer'

source-map-js and error-stack-parser are CommonJS with neither an exports nor a module field, so Vite serves them untransformed unless they are pre-bundled. ErrorBoundary imports DevToolbar statically, so this fires on healthy pages rather than only on errors.

This is a v2 regression. #1231 added both to optimizeDeps in 2024 and every published v1 still carries it. The v2 src/config/index.ts is a rewrite that never did, so every v2 release is affected, 2.0.0-alpha.0 through 2.0.0.

What is the new behavior?

Both are pre-bundled again, on the client environment, gated on devOverlay.

Other information

The @solidjs/start > prefix is required. Both are dependencies of @solidjs/start rather than of the app, so a bare specifier does not resolve from the project root under pnpm and Vite skips the entry silently.

---

Aside: I am currently available for web contracting or full-time work. Contact: adrian@pascu.be.

[changeset-bot]

🦋 Changeset detected

Latest commit: ec4c822

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@solidjs/start	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[netlify]

✅ Deploy Preview for solid-start-landing-page ready!

Name	Link
🔨 Latest commit	ec4c822
🔍 Latest deploy log	https://app.netlify.com/projects/solid-start-landing-page/deploys/6a879492f8e6b00008e94cbb
😎 Deploy Preview	https://deploy-preview-2282--solid-start-landing-page.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
🤖 Make changes	Run an agent on this branch

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@solidjs/start@2282

commit: ec4c822

[brenelz]

Is this good to go then?

[adipascu]

@brenelz good to go. If you'd rather drop the CommonJS dependencies from the toolbar entirely instead, I can do that as a follow-up.

[lxsmnsyc]

@adipascu if there's a good alternative for source-map processing, that would be great

[adipascu]

@lxsmnsyc There is: @jridgewell/trace-mapping for the source maps and error-stack-parser-es for the stack parsing, both ESM. I would merge the current PR as is and swap the libraries in a follow-up PR.

[lxsmnsyc]

@adipascu I've made the swap in #2308 except the error stack parser