Named default export missing from bundle when using bundler-library

[chuckdries]

I believe this is not a duplicate of #7622

🐛 bug report

In a project which uses @parcel/bundler-library, any statements that assign names to default exports (e.g. in a barrel file) such as export { default as some_name } from "./some_file", are missing from the bundle output.

🎛 Configuration (.babelrc, package.json, cli command)

//.parcelrc
{
  "extends": "@parcel/config-default",
  "bundler": "@parcel/bundler-library"
}

{
  "name": "parcel-export-default-as-bug",
  "version": "1.0.0",
  "description": "",
  "source": "src/index.ts",
  "module": "dist/index.mjs",
  "scripts": {
    "build": "parcel build"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@parcel/bundler-library": "^2.13.3",
    "parcel": "^2.13.3"
  }
}

// src/__localization__/index.js
export { default as en_us } from "./en_us.json";

🤔 Expected Behavior

Exported symbols should be exported in the bundle

😯 Current Behavior

Exported symbols are missing from the bundle. This is the entire file that is written to dist in the sample repo (linked below)

// dist/__localization__.hash.js
import $7squd$en_usaf30262bjs from "./en_us.af30262b.js";


function $parcel$interopDefault(a) {
  return a && a.__esModule ? a.default : a;
}



//# sourceMappingURL=__localization__.d99090b7.js.map

🔦 Context

We have an automated localization system which writes strings to JSON files, and writes a barrel file that looks like

export {default as en_us} from "./en_us.json"

We need these exports to make it into our final bundle.

I've found the following workaround does work

import en_us_json from "./en_us.json"
export const en_us = en_us_json

The issue is our localization infra generates and commits this file in CI, and we don't own that infra, so actually applying this workaround is basically impossible short of a prebuild script that uses sed or something.

💻 Code Sample

This repo is a minimal reproduction of the issue https://github.com/chuckdries/parcel-export-default-as-bug/

🌍 Your Environment

Software	Version(s)
Parcel	2.13.3
Node	20.9.0
npm/Yarn	npm
Operating System	macos

[devongovett]

What about this?

export * as en_us from './en_us.json'

Might be a default interop issue since JSON is not ESM.

[chuckdries]

export * as en_us from './en_us.json' does appear to work