Cannot read property 'createChildCompiler' of undefined

[johannes-z]

Version

3.0.5

Node and OS info

10.12.0, 1.10.1, Windows 10

Steps to reproduce

This is my package.json:

{
  "name": "tmp",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "serve": "vue-cli-service serve",
    "build": "vue-cli-service build",
    "lint": "vue-cli-service lint",
    "test": "vue-cli-service test:unit",
    "test:unit": "vue-cli-service test:unit"
  },
  "dependencies": {
    "vue": "^2.5.17",
    "worker-loader": "^2.0.0"
  },
  "devDependencies": {
    "@vue/cli-plugin-babel": "^3.0.5",
    "@vue/cli-plugin-eslint": "^3.0.5",
    "@vue/cli-plugin-typescript": "^3.0.5",
    "@vue/cli-plugin-unit-jest": "^3.0.5",
    "@vue/cli-service": "^3.0.5",
    "@vue/eslint-config-standard": "^3.0.5",
    "@vue/eslint-config-typescript": "^3.0.5",
    "@vue/test-utils": "^1.0.0-beta.25",
    "babel-core": "7.0.0-bridge.0",
    "babel-jest": "^23.6.0",
    "dayjs": "^1.7.7",
    "element-resize-detector": "^1.1.14",
    "interactjs": "^1.3.4",
    "node-sass": "^4.9.4",
    "null-loader": "^0.1.1",
    "office-ui-fabric-vue": "git https://github.com/johannes-z/office-ui-fabric-vue.git#dev",
    "sass-loader": "^7.1.0",
    "style-resources-loader": "^1.2.1",
    "typescript": "^3.1.3",
    "vue-mq": "^0.2.1",
    "vue-snotify": "^3.2.1",
    "vue-template-compiler": "^2.5.17",
    "vuex": "^3.0.1"
  },
  "gitHooks": {
    "pre-commit": "npm run lint"
  }
}

What is expected?

yarn build should work, and process the worker correctly.

What is actually happening?

yarn serve works, but yarn build results in an error, originating from the worker file:

Module build failed (from ./node_modules/thread-loader/dist/cjs.js):
Thread Loader (Worker 0)
Cannot read property 'createChildCompiler' of undefined

    at Object.pitch (C:\Users\johannes.zwirchmayr.C4\Projects\corner4\C4.CS.Widgets\node_modules\worker-loader\dist\index.js:83:39)

 @ ./node_modules/cache-loader/dist/cjs.js??ref--12-0!./node_modules/thread-loader/dist/cjs.js!./node_modules/babel-loader/lib!./node_modules/cache-loader/dist/cjs.js??ref--0-0!./node_modules/vue-loader/lib??vue-loader-options!./src/App.vue?vue&type=script&lang=js& 109:0-74 339:37-56
 @ ./src/App.vue?vue&type=script&lang=js&
 @ ./src/App.vue
 @ ./src/main.ts
 @ multi ./src/main.ts

---

See also: developit/workerize-loader#42

[LinusBorg]

If I understand correctly, this is a problem between thread-loader and workerize-loader.

So nothing we can fix I think, it has to be solved upstream.

Meanwhile, you can set parallel: false in vue.config.js to disable thread-loader.

[johannes-z]

@LinusBorg Cool, works great!