build.manifest: true with a worker causes only the manifest for the workers to be written

[segevfiner]

Describe the bug

Building a project with workers and build.manifest: true enabled will result in the generated manifest.json to only contain information about the workers.

Reproduction

https://stackblitz.com/edit/vitejs-vite-qxvavl?file=src/App.vue

Steps to reproduce

1. Run vite build.
2. You get the error The emitted file "manifest.json" overwrites a previously emitted file of the same name..
3. The generated manifest.json only contains information for the workers.

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 16.14.2 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 7.17.0 - /usr/local/bin/npm
  npmPackages:
    @vitejs/plugin-vue: ^4.1.0 => 4.1.0 
    vite: ^4.2.1 => 4.2.1

Used Package Manager

npm

Logs

Click to expand!

The emitted file "manifest.json" overwrites a previously emitted file of the same name.

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[stackblitz]

Start a new pull request in StackBlitz Codeflow.

• vitejs-vite-qxvavl (Open reproduction)

[sapphi-red]

Duplicate of #10190

[sapphi-red]

This was fixed by #12661 but not released yet.