Command

build

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

19.0.0-next.9

Description

When running ng build on a freshly generated Angular 19 prerelease project, an error is thrown.

Minimal Reproduction

• Run npx @angular/cli@next new and enable SSR
• Run ng build

Exception or Error

✘ [ERROR] An error occurred while extracting routes.

Error: No handler function exported from /projects/ng19-test-proj/node_modules/@angular/build/src/utils/server-rendering/routes-extractor-worker.js
    at /projects/ng19-test-proj/node_modules/piscina/dist/worker.js:142:23

Your Environment

Angular CLI: 19.0.0-next.12
Node: 20.18.0
Package Manager: npm 10.9.0
OS: darwin x64

Angular: 19.0.0-next.10
... animations, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, platform-server
... router

Package Version

@angular-devkit/architect 0.1900.0-next.12
@angular-devkit/build-angular 19.0.0-next.12
@angular-devkit/core 19.0.0-next.12
@angular-devkit/schematics 19.0.0-next.12
@angular/cli 19.0.0-next.12
@angular/ssr 19.0.0-next.12
@schematics/angular 19.0.0-next.12
rxjs 7.8.1
typescript 5.6.3
zone.js 0.15.0

Anything else relevant?

No response