Reproduction repo: rollup-plugin-commonjs-alternate does not correctly handle undefined default exports
To reproduce the issue:
npm install
npm run tests
zloirock/core-js#764 (comment)
zloirock/core-js#896 (comment)
https://github.com/olemartinorg/core-js-firefox-bug
PepsRyuu/rollup-plugin-commonjs-alternate#3