Source map + minimizer results in silent failure

[underflow00]

• Operating System: Win 10
• Node Version: 10.15.3
• NPM Version: 6.4.1
• webpack Version: 4.35.0
• terser-webpack-plugin Version: 1.3.0

Expected Behavior

Using source map with minimizer created a minified file with a source map.

Actual Behavior

Using source map with minimizer causes silent failure. Output file not created. No console output.

How Do We Reproduce?

1. Create empty file 1.js
2. Create webpack.config.js file with contents:

const TerserPlugin = require('terser-webpack-plugin');
module.exports = {
    devtool:  'source-map',
    entry: './1.js',
    resolve: {
        extensions: ['.js']
    },
    output: {
        filename: 'main.js',
        path: __dirname,
    },
    optimization: {
        minimize: true,
        minimizer: [
            new TerserPlugin({
                sourceMap: true,
            }),
        ],
    }
};

3. Run webpack --config webpack.config.js

[underflow00]

It works after downgrading terser-webpack-plugin to v1.2.4. Something to do with the terser upgrade? Or is it a caching problem?

[wallzero]

I am running into this as well. It looks like #101 is also.

[alexander-akait]

Please create minimum reproducible test repo

[alexander-akait]

Looks like problem in terser

[p3x-robot]

here is the the error:

git clone https://github.com/patrikx3/redis-ui-material
npm install
# now in the src/builder/webpack.config.js file, rename sourceMap: false to sourceMap: true
# and there are you with the error
npm run build

[alexander-akait]

@p3x-robot thanks, i will look on this in near future

[alexander-akait]

Problem in latest terser release terser/terser#382

[underflow00]

That terser issue won't be fixed anytime soon. You should revert it here.

[p3x-robot]

which version i should revert to ?

[p3x-robot]

well, there is a new build on terser-js/terser, but i can perfectly uglify with it, i only get this error in the terser-webpack-plugin

[p3x-robot]

actually now it works, as it is a patch and it auto upgrades it to 4.0.2 and the sourcemaps are ok!

[p3x-robot]

terser 4.0.0 was bad, 4.0.2 is good, so there is nothing to do, just npm install again and you will be upgraded to terser 4.0.2 automatically

[alexander-akait]

Closed, update deps