this._identifier.split error, can't read property

[gartz]

• Operating System: MacOS
• Node Version: v12.13.1
• NPM Version: 6.12.1
• webpack Version: 4.41.6
• mini-css-extract-plugin Version: 0.9.0

Expected Behavior

To not throw errors when this._identifier is not a string (might be null)

Actual Behavior

    const resource = this._identifier.split('!').pop();
                                      ^

TypeError: Cannot read property 'split' of undefined

Code

it's huge, but basically when enabled SSR rendering for the CSS loaders

How Do We Reproduce?

Add loaders:

• css-loader with option onlyLocals: true
• url-loader with option emitFile: false
• file-loader with option emitFile: false

[alexander-akait]

Please create reproducible test repo

[gartz]

I'm using the react-create-app, if I enable the onlyLocals from css-loader it gives that error mentioned, when I disable it, seems to work, but I'm not sure yet if the builded file is valid.

[alexander-akait]

@gartz Maybe you can provide steps to reproduce it using CRA?

Don't forget what onlyLocals: true for build on node side , not for the browser side, so you should not enable it

[alexander-akait]

Close in favor #205