[Compiler Bug]:

[BorzovRuslanR]

What kind of issue is this?

• React Compiler core (the JS output is incorrect, or your app works incorrectly after optimization)
• babel-plugin-react-compiler (build issue installing or using the Babel plugin)
• eslint-plugin-react-compiler (build issue installing or using the eslint plugin)
• react-compiler-healthcheck (build issue installing or using the healthcheck script)

Link to repro

problem with build in jenkins unable to provide link

Repro steps

After building the react application with vite.js, I get this error when I access the application's home page:

react.production.min.js:20 Uncaught TypeError: Cannot set properties of undefined (setting 'Children') at requireReact_production_min (react.production.min.js:20:1) at requireReact (index.js:4:20) at requireUseSyncExternalStoreWithSelector_production (use-sync-external-st…production.js:12:13) at requireWithSelector (with-selector.js:4:20) at with-selector.js:7:1.

When I open the application in development, the error is not present in production mode, it is present. Have you ever encountered this problem? Thanks in advance.

How often does this bug happen?

Only once

What version of React are you using?

19.1.0

What version of React Compiler are you using?

19.1.0

[entlv]

Hi! The error you're encountering:

Cannot set properties of undefined (setting 'children')

usually happens when a component is being rendered with a children prop, but the component itself is undefined at runtime — often due to incorrect imports or dynamic loading issues.

Since the error appears only in production, here are a few suggestions:

1. Check for dynamic imports or tree-shaking issues — Vite or your bundler might be removing unused components during optimization. Try making sure the component that expects children is explicitly imported and used.

2. Verify React version consistency between development and production. A mismatch can cause hydration or execution issues.

3. Wrap the component with a null-check before rendering:

{Component && <Component>{children}</Component>}

4. Check your useSyncExternalStore usage — this is a lower-level hook used internally by some libraries. If you're using Zustand or Redux, make sure they are correctly configured and up to date.

Let me know if you can provide a minimal reproducible example later — it would help a lot in narrowing it down.

[BorzovRuslanR]

I solved my problem, after 10 hours of trying to check and reinstall something, I thought and looked carefully at my vite.config.ts and the problem turned out to be that I was not using rollupOptions correctly and did not divide my build into chunks correctly, so somewhere the global react was not pulled up and this problem occurred.

[josephsavona]

Thanks for following up!