...$export$getBaseURL is not defined

[mischnic]

🐛 bug report

An error is thrown with scope-hoisting and strict mode.

cc @surma

🤔 Expected Behavior

Works

😯 Current Behavior

Uncaught ReferenceError: $10da859f8926f997eca867931986be87$export$getBaseURL is not defined

function $abc$exec() {
  $abc$exports = {};
  $abc$var$bundleURL = null;
  $abc$export$getBundleURL = $abc$var$getBundleURLCached;
  $abc$exports.getBundleURL = $abc$export$getBundleURL;
  $abc$export$getBaseURL = $abc$var$getBaseURL; // <---
  $abc$export$getOrigin = $abc$var$getOrigin;
  $abc$exports.getOrigin = $abc$export$getOrigin;
}

$abc$export$getBaseURL is never declared (and indeed unused), so that assignment should just be omitted.

💁 Possible Solution

The problem is probably somewhere in here:

parcel/packages/shared/scope-hoisting/src/link.js

Lines 842 to 887 in 0d3abd6

	AssignmentExpression(node, state, ancestors) {
	if (isIdentifier(node.left)) {
	let res = maybeReplaceIdentifier(node.left, ancestors);
	if (isIdentifier(res) || isMemberExpression(res)) {
	node.left = res;
	}
	return;
	}
	if (!isMemberExpression(node.left)) {
	return;
	}
	let {
	left: {object, property, computed},
	right,
	} = node;
	if (
	!(
	isIdentifier(object) &&
	((isIdentifier(property) && !computed) || isStringLiteral(property))
	)
	) {
	return;
	}
	// Rename references to exported symbols to the exported name.
	let exp = exportedSymbols.get(object.name);
	if (exp) {
	object.name = exp[0].local;
	}
	let asset = exportsMap.get(object.name);
	if (!asset) {
	return;
	}
	if (!needsExportsIdentifier(object.name)) {
	return REMOVE;
	}
	if (isIdentifier(right) && !needsDeclaration(right.name)) {
	return REMOVE;
	}
	},

💻 Code Sample

(type="module"is just so that it runs in strict mode, this isn't specific to ESM)

<script type="module" src="index.js"></script>

if (typeof process !== "undefined" && process.env.TARGET_DOMAIN) {
} else {
	let worker = new Worker("./worker.js");
}

// worker.js
console.log("worker");

Smaller reproduction:

if (Date.now() > 0) {
	console.log(require("./bundle-url").getBundleURL());
}

// bundle-url.js
function getBundleURL() {
  return "bundle";
}

function getBaseURL(url) {
  return "base";
}

exports.getBundleURL = getBundleURL;
exports.getBaseURL = getBaseURL;

🌍 Your Environment

Software	Version(s)
Parcel	2.0.0-nightly.579