SvelteKit with web worker -> TypeError: Cannot read properties of undefined (reading 'file')

[peterpeterparker]

Describe the bug

Building a SvelteKit project (static adapter) that loads a web worker with last version of Vite which relies on Rollup v3.20.2 leads to following issue:

[vite-plugin-sveltekit-compile] Cannot read properties of undefined (reading 'file')
✓ built in 262ms
error during build:
TypeError: Cannot read properties of undefined (reading 'file')
at file:///Users/daviddalbusco/projects/lab/my-project-webworker/node_modules/@sveltejs/kit/src/exports/vite/build/build_server.js:74:83
at Array.forEach ()

Downgrading Rollup to v3.15.0 resolve the problem.

Note: it might no be a Vite issue but, Rollup. Not knowing where to report it, I thought about opening this issue first. If I should forward the question to Rollup, let me know.

Reproduction

https://github.com/peterpeterparker/my-project-webworker

Steps to reproduce

git clone https://github.com/peterpeterparker/my-project-webworker
cd my-project-webworker
npm ci
npm run build

note: the project also contains a branch build/ok-rollup-3.15.0 which displays that downgrading fixes the issue

System Info

❯ npx envinfo --system --npmPackages '{vite,@vitejs/*}' --binaries --browsers

  System:
    OS: macOS 13.3
    CPU: (8) arm64 Apple M2
    Memory: 98.48 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 18.15.0 - /usr/local/bin/node
    npm: 9.6.1 - /opt/homebrew/bin/npm
  Browsers:
    Brave Browser: 111.1.49.132
    Chrome: 111.0.5563.146
    Firefox: 111.0.1
    Safari: 16.4
  npmPackages:
    vite: ^4.2.0 => 4.2.1

Used Package Manager

npm

Logs

No response

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.

[sapphi-red]

Updating Vite to 4.3.0-beta.2 worked. I think this is a duplicate of #10190.

[peterpeterparker]

Agree @sapphi-red it looks like 4.3.0-beta.2 solves it. Thanks for the feedback!