License info being included twice after Webpack 4 build

Not sure if this is a Webpack issue or something with classnames. The reason I don’t think it is Webpack is because, in the bundled file, no other third party scripts are adding the license info twice.

I thought it was maybe because there is license info in index.js, bind.js & dedupe.js. However, I ruled this out after adding a test change in the copyright text in only index.js and the change was showing on both license comments in the bundle.

Webpack: v4.8.3 NPM: v5.6.0 Node: v8.1.1

Included below is my Webpack config plus a screen shot of the output.

webpack.config.js

const ExtractTextPlugin = require('extract-text-webpack-plugin');

module.exports = {
    mode: 'production',
    devtool: "source-maps",
    entry: "./src/js/index.tsx",
    output: {
        path: __dirname + "/dist",
        filename: "js/bundle.min.js"
    },
    resolve: {
        extensions: [".ts", ".tsx", ".js", ".json"]
    },
    module: {
        rules: [
            {
                test: /\.(ts|tsx)$/,
                use: [
                    {
                        loader: 'ts-loader'
                    }
                ]
            },
            {
                test: /\.scss$/,
                use: ExtractTextPlugin.extract({
                    use: [{
                        loader: 'css-loader',
                    }, {
                        loader: 'sass-loader'
                    }],
                    fallback: 'style-loader'
                })
            }
        ]
    },
    plugins: [
        new ExtractTextPlugin({
            filename: 'css/bundle.min.css',
            allChunks: true,
        })
    ],
    externals: {
        "react": "React",
        "react-dom": "ReactDOM"
    },
};

bundle.min.js

[vivcogit]

This bug fixed in terser. I think this issue can be closed

[dcousens]

This is because LICENSE.md is being included, and for whatever reason @JedWatson decided to put the LICENSE prefix in the index.js too… hence, twice.

I don’t think I want to ping @JedWatson the 1000’s of times necessary to get him to resolve this…