Broken Homepage when using App Router + Middleware + i18n config + trailingSlash config

### Link to the code that reproduces this issue https://github.com/heymath/nextjs-bug-homepage-i18n-trailingslash-middleware ### To Reproduce 📝 Add dev domains in your `/etc/hosts` file: ``` 127.0.0.1 www.dev.fr www.dev.es www.dev.it www.dev.de www.dev.ch www.dev.nl ``` --- - Go to: http://www.dev.fr - See broken homepage (white screen) with logs: ``` inject.bundle.js:1 Uncaught Error: Automatic publicPath is not supported in this browser at inject.bundle.js:1:12813 at inject.bundle.js:1:12976 at inject.bundle.js:1:271814 (anonymous) @ inject.bundle.js:1 (anonymous) @ inject.bundle.js:1 (anonymous) @ inject.bundle.js:1 ``` **You can test the following cases:** ### Middleware (revert any changes) - Rename `./src/midleware.ts` into `./src/__middleware.ts` for instance - Refresh http://www.dev.fr : the Home page is working. - Go to http://www.dev.fr/test/ : the Test page is working also. ### Trailing slash (revert any changes) - Comment the `trailinSlash: true` line in `next.config.ts`. - Refresh http://www.dev.fr : the Home page is working. - Go to http://www.dev.fr/test/ : the Test page is working also. ### i18n config (revert any changes) - Comment the `i18n` config in `next.config.ts`. - Refresh http://www.dev.fr : the Home page is working. - Go to http://www.dev.fr/test/ : the Test page is working also. When it breaks with a white screen on home page, you can see that it breaks "immediately", you don't even go through the middleware where you would like to try to patch something 😬 ### Current vs. Expected behavior **Current behavior:** white screen with error logs on homepage **Expected behavior:** homepage working correctly ### Provide environment information ```bash Operating System: Platform: darwin Arch: arm64 Version: Darwin Kernel Version 25.0.0: Mon Aug 25 21:17:54 PDT 2025; root:xnu-12377.1.9~3/RELEASE_ARM64_T6041 Available memory (MB): 49152 Available CPU cores: 12 Binaries: Node: 22.14.0 npm: 10.9.2 Yarn: N/A …