ModuleConcatenationPluginNameCollision

This repo demonstrates bug in webpack 5.2.0

Steps to reproduce

1. Install packages

   npm i

2. Start webpack server

   npm run serve

3. Open http://localhost:9000 and see exception in console

index.js:2 Uncaught ReferenceError: Cannot access 't' before initialization
    at e (index.js:2)
    at Function.mixin (index.js:2)
    at index.js:2
    at index.js:2
    at index.js:2

Problem is that this code without name collision

// ExtendedProduct/Mixin.js
import BaseMixin from '../BaseProduct/Mixin';

export default target => class Mixin extends target.mixin(BaseMixin) {
    get name() {
        return 'ExtendedMixin';
    }
}

turns to this code with name collision:

const e = e=>class t extends (e.mixin(t)) {
    get name() {
        return "ExtendedMixin"
    }
}

Problem can be avoided if I disable ModuleConcatenationPlugin:

module.exports = {
    optimization: {
        concatenateModules: false
    }
}