Running vite build throws error when creating new Worker

[icheered]

Describe the bug

This issue was encountered in emscripten generated code, but points to an issue in Vite. I narrowed the issue down to the following:

// main.js
import Module from './libapi.mjs';

// libapi.mjs
var Module = (() => {
    return function () {
        new Worker(new URL("libapi.worker.js", import.meta.url));
    };
})();

export default Module;

// libapi.worker.js
var Module = {};

self.onmessage = event => {
    if (event.data.cmd === "load") {
        import("./libapi.mjs");
    }
};

During development this gives no issues, but during building this results in the error:

Unexpected early exit. This happens when Promises returned by plugins cannot resolve. Unfinished hook action(s) on exit:
(vite:worker-import-meta-url) transform "<path>/libapi.mjs"

This error is solved when changing the creation of a new worker to the following:

new Worker(new URL("libapi.worker.js", import.meta.url, { type: "module" }));

But this is an invalid invocation of 'new URL' .

PR where the issue is discussed: GoogleChromeLabs/web-gphoto2#12
Related issues: #8427
Possibly related PR: #14260

Note: This issue gives an error on Vite 4.4.2. I tried upgrading to Vite 5 but this results in a memory leak instead.

Reproduction

https://github.com/icheered/vite-issue-min-repr

Steps to reproduce

Run npm install followed by npm run build.

System Info

System:
    OS: Linux 6.2 Fedora Linux 36 (Thirty Six)
    CPU: (16) x64 Intel(R) Core(TM) i7-10700 CPU @ 2.90GHz
    Memory: 19.72 GB / 31.26 GB
    Container: Yes
    Shell: 5.8.1 - /usr/bin/zsh
  Binaries:
    Node: 18.13.0 - ~/.nvm/versions/node/v18.13.0/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 9.8.1 - ~/.nvm/versions/node/v18.13.0/bin/npm
    pnpm: 8.9.2 - ~/.nvm/versions/node/v18.13.0/bin/pnpm
  Browsers:
    Chrome: 119.0.6045.159
  npmPackages:
    vite: ^5.0.1 => 5.0.1

Used Package Manager

npm

Logs

vite-url-issue@0.0.0 build
vite build --debug

vite:config no config file found. +0ms
vite:config using resolved config: {
vite:config root: '<my_path>/vite-url-issue',
vite:config base: '/',
vite:config mode: 'production',
vite:config configFile: undefined,
vite:config logLevel: undefined,
vite:config clearScreen: undefined,
vite:config optimizeDeps: {
vite:config disabled: 'build',
vite:config force: undefined,
vite:config esbuildOptions: { preserveSymlinks: false }
vite:config },
vite:config build: {
vite:config target: [ 'es2020', 'edge88', 'firefox78', 'chrome87', 'safari14' ],
vite:config cssTarget: [ 'es2020', 'edge88', 'firefox78', 'chrome87', 'safari14' ],
vite:config outDir: 'dist',
vite:config assetsDir: 'assets',
vite:config assetsInlineLimit: 4096,
vite:config cssCodeSplit: true,
vite:config sourcemap: false,
vite:config rollupOptions: {},
vite:config minify: 'esbuild',
vite:config terserOptions: {},
vite:config write: true,
vite:config emptyOutDir: null,
vite:config copyPublicDir: true,
vite:config manifest: false,
vite:config lib: false,
vite:config ssr: false,
vite:config ssrManifest: false,
vite:config ssrEmitAssets: false,
vite:config reportCompressedSize: true,
vite:config chunkSizeWarningLimit: 500,
vite:config watch: null,
vite:config commonjsOptions: { include: [Array], extensions: [Array] },
vite:config dynamicImportVarsOptions: { warnOnError: true, exclude: [Array] },
vite:config modulePreload: { polyfill: true },
vite:config cssMinify: true
vite:config },
vite:config configFileDependencies: [],
vite:config inlineConfig: {
vite:config root: undefined,
vite:config base: undefined,
vite:config mode: undefined,
vite:config configFile: undefined,
vite:config logLevel: undefined,
vite:config clearScreen: undefined,
vite:config optimizeDeps: { force: undefined },
vite:config build: {}
vite:config },
vite:config rawBase: '/',
vite:config resolve: {
vite:config mainFields: [ 'module', 'jsnext:main', 'jsnext' ],
vite:config browserField: true,
vite:config conditions: [],
vite:config extensions: [
vite:config '.mjs', '.js',
vite:config '.mts', '.ts',
vite:config '.jsx', '.tsx',
vite:config '.json'
vite:config ],
vite:config dedupe: [],
vite:config preserveSymlinks: false,
vite:config alias: [ [Object], [Object] ]
vite:config },
vite:config publicDir: '<my_path>/vite-url-issue/public',
vite:config cacheDir: '<my_path>/vite-url-issue/node_modules/.vite',
vite:config command: 'build',
vite:config ssr: {
vite:config format: 'esm',
vite:config target: 'node',
vite:config optimizeDeps: { disabled: true, esbuildOptions: [Object] }
vite:config },
vite:config isWorker: false,
vite:config mainConfig: null,
vite:config isProduction: true,
vite:config plugins: [
vite:config 'vite:build-metadata',
vite:config 'vite:watch-package-data',
vite:config 'vite:pre-alias',
vite:config 'alias',
vite:config 'vite:modulepreload-polyfill',
vite:config 'vite:resolve',
vite:config 'vite:html-inline-proxy',
vite:config 'vite:css',
vite:config 'vite:esbuild',
vite:config 'vite:json',
vite:config 'vite:wasm-helper',
vite:config 'vite:worker',
vite:config 'vite:asset',
vite:config 'vite:wasm-fallback',
vite:config 'vite:define',
vite:config 'vite:css-post',
vite:config 'vite:build-html',
vite:config 'vite:worker-import-meta-url',
vite:config 'vite:asset-import-meta-url',
vite:config 'vite:force-systemjs-wrap-complete',
vite:config 'commonjs',
vite:config 'vite:data-uri',
vite:config 'vite:dynamic-import-vars',
vite:config 'vite:import-glob',
vite:config 'vite:build-import-analysis',
vite:config 'vite:esbuild-transpile',
vite:config 'vite:terser',
vite:config 'vite:reporter',
vite:config 'vite:load-fallback'
vite:config ],
vite:config css: undefined,
vite:config esbuild: { jsxDev: false },
vite:config server: {
vite:config preTransformRequests: true,
vite:config sourcemapIgnoreList: [Function: isInNodeModules],
vite:config middlewareMode: false,
vite:config fs: { strict: true, allow: [Array], deny: [Array] }
vite:config },
vite:config preview: {
vite:config port: undefined,
vite:config strictPort: undefined,
vite:config host: undefined,
vite:config https: undefined,
vite:config open: undefined,
vite:config proxy: undefined,
vite:config cors: undefined,
vite:config headers: undefined
vite:config },
vite:config envDir: '<my_path>/vite-url-issue',
vite:config env: { BASE_URL: '/', MODE: 'production', DEV: false, PROD: true },
vite:config assetsInclude: [Function: assetsInclude],
vite:config logger: {
vite:config hasWarned: false,
vite:config info: [Function: info],
vite:config warn: [Function: warn],
vite:config warnOnce: [Function: warnOnce],
vite:config error: [Function: error],
vite:config clearScreen: [Function: clearScreen],
vite:config hasErrorLogged: [Function: hasErrorLogged]
vite:config },
vite:config packageCache: Map(1) {
vite:config 'fnpd_<my_path>/vite-url-issue' => {
vite:config dir: '<my_path>/vite-url-issue',
vite:config data: [Object],
vite:config hasSideEffects: [Function: hasSideEffects],
vite:config webResolvedImports: {},
vite:config nodeResolvedImports: {},
vite:config setResolvedCache: [Function: setResolvedCache],
vite:config getResolvedCache: [Function: getResolvedCache]
vite:config },
vite:config set: [Function (anonymous)]
vite:config },
vite:config createResolver: [Function: createResolver],
vite:config worker: {
vite:config format: 'iife',
vite:config plugins: [
vite:config 'vite:build-metadata',
vite:config 'vite:watch-package-data',
vite:config 'vite:pre-alias',
vite:config 'alias',
vite:config 'vite:modulepreload-polyfill',
vite:config 'vite:resolve',
vite:config 'vite:html-inline-proxy',
vite:config 'vite:css',
vite:config 'vite:esbuild',
vite:config 'vite:json',
vite:config 'vite:wasm-helper',
vite:config 'vite:worker',
vite:config 'vite:asset',
vite:config 'vite:wasm-fallback',
vite:config 'vite:define',
vite:config 'vite:css-post',
vite:config 'vite:build-html',
vite:config 'vite:worker-import-meta-url',
vite:config 'vite:asset-import-meta-url',
vite:config 'vite:force-systemjs-wrap-complete',
vite:config 'commonjs',
vite:config 'vite:data-uri',
vite:config 'vite:worker-post',
vite:config 'vite:dynamic-import-vars',
vite:config 'vite:import-glob',
vite:config 'vite:build-import-analysis',
vite:config 'vite:esbuild-transpile',
vite:config 'vite:terser',
vite:config 'vite:load-fallback'
vite:config ],
vite:config rollupOptions: {},
vite:config getSortedPlugins: [Function: getSortedPlugins],
vite:config getSortedPluginHooks: [Function: getSortedPluginHooks]
vite:config },
vite:config appType: 'spa',
vite:config experimental: { importGlobRestoreExtension: false, hmrPartialAccept: false },
vite:config getSortedPlugins: [Function: getSortedPlugins],
vite:config getSortedPluginHooks: [Function: getSortedPluginHooks]
vite:config } +10ms
vite v4.4.2 building for production...
vite:esbuild 19.27ms tsconfck init <my_path>/vite-url-issue +0ms
transforming (1) index.html vite:resolve 0.27ms libapi.worker.js -> <my_path>/vite-url-issue/src/libapi.worker.js +0ms
vite:resolve 0.21ms libapi.worker.js -> <my_path>/vite-url-issue/src/libapi.worker.js +0ms
Unexpected early exit. This happens when Promises returned by plugins cannot resolve. Unfinished hook action(s) on exit:
(vite:worker-import-meta-url) transform "<my_path>/vite-url-issue/src/libapi.mjs"
error during build:
Error: Unexpected early exit. This happens when Promises returned by plugins cannot resolve. Unfinished hook action(s) on exit:
(vite:worker-import-meta-url) transform "<my_path>/vite-url-issue/src/libapi.mjs"
at process.handleBeforeExit (file://<my_path>/vite-url-issue/node_modules/rollup/dist/es/shared/node-entry.js:25902:28)
at Object.onceWrapper (node:events:628:26)
at process.emit (node:events:513:28)

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]

The cause is the circular import: libapi.mjs -> libapi.worker.js -> libapi.mjs -> ...

Duplicate of #7015