This module breaks SASS modules composition in CRA

[igor10k]

Updated my CRA to the latest version and the build started failing. A little debugging showed that removing the resolve-url-loader fixes the issue.

The error is thrown when trying to use the CSS modules composition feature with a css preprocessor. Composing from a SASS module doesn't work. Composing from a CSS module works.

Thrown error

./src/b.module.sass (./node_modules/css-loader/dist/cjs.js??ref--6-oneOf-6-1!./node_modules/postcss-loader/src??postcss!./node_modules/resolve-url-loader??ref--6-oneOf-6-3!./src/b.module.sass)
Error: resolve-url-loader: CSS error
  ./src/b.module.sass:2:3: Unknown word
You tried to parse Sass with the standard CSS parser; try again with the postcss-sass parser
  You tried to parse Sass with the standard CSS parser; try again with the postcss-sass parser

Steps to reproduce

1. npx create-react-app test_app && cd test_app
2. yarn add node-sass
3. Create b.module.sass with

.test
  background: #FFF

4. Create a.module.sass with

.test
  composes: test from './b.module.sass`

5. In App.js add as the first line import './a.module.sass'
6. yarn start and observe the error

---

7. Rename b.module.sass to b.module.css and replace the contents with

.test {
  background: #FFF;
}

8. In a.module.sass change b.module.sass to b.module.css
9. Observe that the error is gone

[igor10k]

Debugged a bit more and found what exactly is breaking the build. So edited the issue to reflect that.

[bholloway]

It seems this is a css-loader issue per webpack-contrib/css-loader#131.

The same issue has been opened on a number of loaders. It would be consistent with those cases to close this issue here. However I suspect that would just lead to people creating more issues so I will leave open for now.

[mxshahan]

Error: resolve-url-loader: CSS error
source-map information is not available at url() declaration (found orphan CR, try removeCR option)

error Command failed with exit code 1.

I'm getting this error when I try to build my project using react-scripts

[bholloway]

@shahan953 that error is not relevant to this issue. Please follow the docs.

[bholloway]

@igor10k is this still an issue in CRA? Everything I read points to this being fixed.

[bholloway]

In the mean time I'm going to close this issue. Please let me know if it is still a problem and we can reopen.