webpack-5-bug

Steps to reproduce:

1. Clone this repo
2. In the root directory yarn
3. In the ui folder, yarn start
4. Go to https://localhost:4000 in a browser, allow browser to navigate to that page
5. Blank page, look in console to see the error

Uncaught TypeError: Cannot read property 'BClass' of undefined

If you make any of the following changes (just one is fine), the bug does not occur:

• In api/data/domain/src/aClass.ts comment out @Annotate(undefined)
• In api/data/domain/index.ts move export { BClass } from './src/bClass'; above export { AClass } from './src/aClass';
• In ui/src/app/index.tsx change import { AClass } from "data-domain"; to import { AClass } from "data-domain/src/aClass";

This bug did not occur in webpack 4.