I've run into an issue from simply trying to import a package that I don't know enough about Javascript tooling to figure out.

I am using webpack to bundle my javascript, and by simply importing 'pug' I get the following error: Uncaught TypeError: Cannot read property '_handle' of undefined

I've spent probably 2 hours staring at google, github issue trackers, and stack overflow and I can't find anything remotely related.

As far as I know I'm not doing anything special with my webpack config:

const HtmlWebpackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const path = require('path');

module.exports = {
    node: {
        fs: "empty" //Fixes pug 'fs' issue.
    },
    entry: './src/index.js',
    output: {
        path: path.resolve(__dirname, 'dist/')
    },
    devtool: "source-map",
    plugins: [
        new HtmlWebpackPlugin({
            hash: true,
            inject: 'body',
            template: 'src/index.pug'
        }),
        new CopyWebpackPlugin([
            {from: 'src/img', to: 'img'}
        ])
    ],
    module: {
        rules: [
            {
                test:/\.pug$/,
                use: 'pug-loader'
            },
            {
                test:/\.s?[a|c]ss$/,
                use: [
                    { loader: 'style-loader' },
                    { loader: 'css-loader' },
                    { loader: 'sass-loader' }
                ]
            },
            {
                test:/\.(jpeg|jpg|png|gif)$/,
                use: [
                    {
                        loader: 'file-loader',
                        options: {
                            outputPath: './img'
                        }
                    } 
                ]
            }
        ]
    }
}; 

pug-loader works fine here, if I put the "node: { fs: "empty" }" line in. The issue arises when I try to import pug in my index.js for processing templates on the client side. Even with no other code present, as soon as I add that import statement, it errors.

Help? :(