Regression: [email protected] build keeps undefined $7f9d4f94f3d938e3$re_export$bool for ESM

[arty-name]

🐛 bug report

When I build my project using parcel build the output file includes an undefined identifier $7f9d4f94f3d938e3$re_export$bool. Trying to actually use it results in error.

This error only started appearing after #8624 was fixed.

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

The parcel configuration of the project is pretty basic

  "targets": {
    "default": {
      "source": "src/index.html",
      "distDir": "build",
      "context": "browser"
    }
  },

🤔 Expected Behavior

When optimizing the code parcel should not remove declarations of constants that are used in the code.

😯 Current Behavior

The code includes the line e(aA,"bool",(()=>$7f9d4f94f3d938e3$re_export$bool)),.. and $7f9d4f94f3d938e3$re_export$bool is not defined anywhere, resulting in runtime errors.

💁 Possible Solution

Stay on [email protected] for now?

🔦 Context

I was trying to upgrade a project to use the [email protected] and will not do this now.

💻 Code Sample

The parcel update PR in my project and it’s deployed version.

🌍 Your Environment

Software	Version(s)
Parcel	2.8.1
Node	v18.12.1
npm/Yarn	1.22.19
Operating System	Ubuntu 22.04.1

[mischnic]

MInimal Reproduction:

import * as ns from "./library/b";
console.log(ns, ns.value1, ns.value2);

// library/package.json 
{ "sideEffects": false }

// library/b.js
export { value1, value2 } from './c.js';

// library/c.js
export { value1, value1 as value2 } from "./d";

// library/d.js
export const value1 = 2;

A regression caused by #8432