Using with CRA crashes the compilation because of Webpack thread-loader

[fguitton]

Hello everybody !

While using monaco-editor-webpack-plugin with create-react-app we can see the following error below.

This seems to be because of an incompatibility in the Webpack configuration with thread-loader

ERROR in ./node_modules/monaco-editor/esm/vs/editor/editor.main.js
Module build failed: Thread Loader (Worker 4)
Cannot read property 'userRequest' of undefined

    at Object.pitch (C:\Repos\project-ui\node_modules\monaco-editor-webpack-plugin\loaders\include.js:9:61)
 @ ./src/index.js 3:0-40
 @ multi ./node_modules/project-devutils/config/polyfills.js ./node_modules/react-dev-utils/webpackHotDevClient.js ./src/index.js

[ninjatron]

Similar problem with create-react-app. I get this error when I try to instantiate monaco editor webpack plugin in plugin definitions of webpack config:

$ react-scripts start
Failed to compile.

Cannot read property 'normalModuleFactory' of undefined

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this comm
and.

[Fer0x]

Even with disabled thread-loader yarn build freezes and then crashes with lack of memory. The only working solution for me is to set up webpack config like this example: https://github.com/Microsoft/monaco-editor-samples/tree/master/browser-esm-webpack-small

[kandl]

For me, it's happening after upgrade react-create-app to v2.
I resolved it by removing those lines: 2698c97

[Fer0x]

thread-loader has been removed in facebook/create-react-app#5170