Using webpack alias false breaks build

[mmarton]

• Operating System: linux mint 20
• Node Version: 15.11
• NPM Version: 7.6 (but I use yarn: 1.22.5)
• webpack Version: 5.33.2
• css-loader Version: 5.2.3

Expected Behavior

If I alias something to false in webpack config to not to get resolved, the build breaks. Expected to work.
https://webpack.js.org/configuration/resolve/#resolvealias

null-loader is deprecated in webpack 5. use alias: { xyz$: false } or absolute path alias: {[path.resolve(__dirname, './path/to/module')]: false }

Actual Behavior

ERROR in ./index.scss
Module build failed (from ./node_modules/css-loader/dist/cjs.js):
TypeError: request.split is not a function
    at stringifyRequest (/home/mm/PhpstormProjects/css-loader-poc/node_modules/loader-utils/lib/stringifyRequest.js:16:28)
    at Object.urlHandler (/home/mm/PhpstormProjects/css-loader-poc/node_modules/css-loader/dist/index.js:95:60)
    at OnceExit (/home/mm/PhpstormProjects/css-loader-poc/node_modules/css-loader/dist/plugins/postcss-url-parser.js:324:30)
    at processTicksAndRejections (node:internal/process/task_queues:94:5)
    at async LazyResult.runAsync (/home/mm/PhpstormProjects/css-loader-poc/node_modules/postcss/lib/lazy-result.js:388:13)
    at async Object.loader (/home/mm/PhpstormProjects/css-loader-poc/node_modules/css-loader/dist/index.js:139:14)

Code

const path = require('path');
module.exports = {
    entry: './index.css',
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'build.css'
    },
    module: {
        rules: [
            {
                test: /\.css$/,
                use: {loader: 'css-loader'}
            }
        ]
    },
    resolve: {
        alias: {'/logo.png': false}
    }
}

.logo {
    background-image: url(/logo.png);
}

How Do We Reproduce?

[alexander-akait]

Yep, bug, WIP on this

[alexander-akait]

#1292

[mmarton]

less than 3hour from issue submission to a new release? nice. where's the donate button? :)

[alexander-akait]

Above (where panel with stars/forks/etc) 😄 Sponsor (https://opencollective.com/webpack)