Terser is not working properly

[domanick55]

Version

3.4.0

Reproduction link

https://cli.vuejs.org/guide/creating-a-project.html#vue-create

Environment info

  System:
    OS: macOS 10.14.***
    CPU: ***
  Binaries:
    Node: 10.15.1 - ~/Applications/node/bin/node
    Yarn: Not Found
    npm: 6.4.1 - ~/Applications/node/bin/npm
  Browsers:
    Chrome: ***
    Firefox: ***
    Safari: ***
  npmGlobalPackages:
    @vue/cli: 3.4.0

Steps to reproduce

1. npm install -g @vue/cli
2. vue create my-project
3. Following the steps on the interactive configurer (described @ https://cli.vuejs.org/guide/creating-a-project.html#vue-create)
4. cd my-project
5. npm run build

What is expected?

I can build without errors, because the project is auto generated and should work.

What is actually happening?

I get error from Terser, like this:

js/app.a1bb0019.js from Terser
TypeError: Cannot read property 'minify' of undefined
    at minify (/path/to/project/node_modules/terser-webpack-plugin/dist/minify.js:175:23)
    at module.exports (/path/to/project/node_modules/terser-webpack-plugin/dist/worker.js:13:40)
    at handle (/path/to/project/node_modules/worker-farm/lib/child/index.js:44:8)
    at process.<anonymous> (/path/to/project/node_modules/worker-farm/lib/child/index.js:51:3)
    at process.emit (events.js:189:13)
    at emit (internal/child_process.js:820:12)
    at process._tickCallback (internal/process/next_tick.js:63:19)

---

In node_modules/terser-webpack-plugin/dist/minify.js I can find this:

[...]

  const {
    error,
    map,
    code,
    warnings
  } = _terser.default.minify({
    [file]: input
  }, terserOptions);

[...]

I've found a workaround by replacing _terser.default.minify by _terser.minify. This is maybe an indicator for a configuration issue. For some reason _terser.default is not defined. Unfortunately I couldn't find a way to fix this permanently. When it comes to automated build management, the workaround can't be applied.

[LinusBorg]

See: #3407 (comment)

[KarmaBlackshaw]

The aforementioned workarounds does not seem to work in my case :( Following also @LinusBorg's comment, it is still not working.

js/app.5f6168a5.js from Terser
Unexpected token operator «+», expected punc «,» [webpack/bootstrap:71,1167][js/app.5f6168a5.js:72,1178]
    at ee (F:\my-business\capstone-cte-ims\ui\node_modules\terser-webpack-plugin\node_modules\terser\dist\bundle.min.js:1:19541)
    at c (F:\my-business\capstone-cte-ims\ui\node_modules\terser-webpack-plugin\node_modules\terser\dist\bundle.min.js:1:28244)
    at l (F:\my-business\capstone-cte-ims\ui\node_modules\terser-webpack-plugin\node_modules\terser\dist\bundle.min.js:1:28335)
    at p (F:\my-business\capstone-cte-ims\ui\node_modules\terser-webpack-plugin\node_modules\terser\dist\bundle.min.js:1:28475)
    at _ (F:\my-business\capstone-cte-ims\ui\node_modules\terser-webpack-plugin\node_modules\terser\dist\bundle.min.js:1:28587)
    at F:\my-business\capstone-cte-ims\ui\node_modules\terser-webpack-plugin\node_modules\terser\dist\bundle.min.js:1:43316
    at F:\my-business\capstone-cte-ims\ui\node_modules\terser-webpack-plugin\node_modules\terser\dist\bundle.min.js:1:28976
    at G (F:\my-business\capstone-cte-ims\ui\node_modules\terser-webpack-plugin\node_modules\terser\dist\bundle.min.js:1:42192)
    at ge (F:\my-business\capstone-cte-ims\ui\node_modules\terser-webpack-plugin\node_modules\terser\dist\bundle.min.js:1:48272)
    at Ae (F:\my-business\capstone-cte-ims\ui\node_modules\terser-webpack-plugin\node_modules\terser\dist\bundle.min.js:1:48998)