TypeError: Cannot read properties of undefined (reading 'config') with 6.0.7

[Artur-]

Describe the bug

Running vite build with Vite 6.0.7 fails with

error during build:
TypeError: Cannot read properties of undefined (reading 'config')
    at Object.renderChunk (file:///.../flow-tests/test-express-build/test-dev-bundle/node_modules/vite/dist/node/chunks/dep-BJP6rrE_.js:12289:39)
    at file:///.../flow-tests/test-express-build/test-dev-bundle/node_modules/rollup/dist/es/shared/node-entry.js:20812:40

the referenced line is

const buildEsbuildPlugin = () => {
  return {
    name: "vite:esbuild-transpile",
    applyToEnvironment(environment) {
      return environment.config.esbuild !== false;
    },
    async renderChunk(code, chunk, opts) {
      if (opts.__vite_skip_esbuild__) {
        return null;
      }
      const config = this.environment.config; // This one

The code was added in #19025

Reproduction

vaadin/flow#20799

Steps to reproduce

mvn clean install -DskipTests

System Info

System:
    OS: macOS 15.2
    CPU: (10) arm64 Apple M1 Max
    Memory: 99.42 MB / 64.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.12.0 - ~/.nvm/versions/node/v22.12.0/bin/node
    npm: 10.9.0 - ~/.nvm/versions/node/v22.12.0/bin/npm
    bun: 1.0.7 - ~/.bun/bin/bun
  Browsers:
    Brave Browser: 107.1.45.123
    Chrome: 131.0.6778.205
    Chrome Canary: 133.0.6940.0
    Edge: 131.0.2903.112
    Safari: 18.2
    Safari Technology Preview: 18.2
  npmPackages:
    @vitejs/plugin-react: 4.3.4 => 4.3.4 
    vite: 6.0.7 => 6.0.7

Used Package Manager

npm

Logs

No response

Validations

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• 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.
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• The provided reproduction is a minimal reproducible example of the bug.

[github-actions]

Hello @Artur-. Please provide a minimal reproduction using a GitHub repository or StackBlitz. Issues marked with needs reproduction will be closed if they have no activity within 3 days.

[hi-ogawa]

Can you try minimizing a repro? I cannot even tell which vite config or plugins are used.

[Artur-]

Thanks for having a look, I dug a bit deeper to see what is going on and now I am not sure if this is a Vite issue or not even though it has worked for a long time. The problem seems to come from this code, which runs rollup inside the Vite config:
https://github.com/vaadin/flow/blob/e365417d6cf0c15ebfe8aaba14073976eb31f220/flow-server/src/main/resources/vite.generated.ts#L156-L171

[hi-ogawa]

It looks like you're reusing Vite (internal) plugin as rollup plugin https://github.com/vaadin/flow/blob/e365417d6cf0c15ebfe8aaba14073976eb31f220/flow-server/src/main/resources/vite.generated.ts#L127-L135 and technically that's not supported officially. The change made by #19025 is a legitimate fix for Vite's own usage (and similar changes have been done / will be done for other internal plugins as well), so I think you have to find an alternative for doing sub build from your plugin.

Though not knowing much context, how about using Vite's build API instead of rollup?