create-react-app-8738-repro

This is a repro for facebook/create-react-app issue #8736 Minified React error #130 - 'this' in JSX arrow function (06/2020)

create-react-app had been ejected and reduced to the absolute minimum.

Steps to reproduce

• checkout the repo. within the repo:
• yarn install
• yarn run build
• npx serve -s build

Open http://localhost:5000 in your browser.

Expected outcome

1. devtools console: Success (PojoTest)
2. rendered component: SUCCESS (ComponentWithoutJsx) and
3. rendered component SUCCESS (ComponentWithJsx)

Actual results

1. devtools console: Success (PojoTest) (ok)
2. rendered component: SUCCESS (ComponentWithoutJsx) (ok) but
3. no rendered component SUCCESS (ComponentWithJsx), instead:
4. error in devtools console like:

Warning: React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.
    in Unknown (created by ComponentWithJsx)
    in ComponentWithJsx