Parcel: @parcel/packager-js: Got unexpected null

```

Building...
Bundling...
Packaging & Optimizing...
🚨 Build failed.

@parcel/packager-js: Got unexpected null

Error: Got unexpected null

at nullthrows
(/home/runner/work/webext-messenger/webext-messenger/node_modules/nullthrows/nullthrows.js:7:15)
at
/home/runner/work/webext-messenger/webext-messenger/node_modules/@parcel/packager-js/lib/ScopeHoistingPackager.js:864:51
at Array.every ()
at
/home/runner/work/webext-messenger/webext-messenger/node_modules/@parcel/packager-js/lib/ScopeHoistingPackager.js:863:35
at Array.filter ()
at ScopeHoistingPackager.buildAssetPrelude
(/home/runner/work/webext-messenger/webext-messenger/node_modules/@parcel/packager-js/lib/ScopeHoistingPackager.js:853:60)
at ScopeHoistingPackager.buildAsset
(/home/runner/work/webext-messenger/webext-messenger/node_modules/@parcel/packager-js/lib/ScopeHoistingPackager.js:404:48)
at ScopeHoistingPackager.visitAsset
(/home/runner/work/webext-messenger/webext-messenger/node_modules/@parcel/packager-js/lib/ScopeHoistingPackager.js:359:17)
at processAsset
(/home/runner/work/webext-messenger/webext-messenger/node_modules/@parcel/packager-js/lib/ScopeHoistingPackager.js:142:40)
at ScopeHoistingPackager.package
(/home/runner/work/webext-messenger/webext-messenger/node_modules/@parcel/packager-js/lib/ScopeHoistingPackager.js:156:9)
```

## Last occurrence

- https://github.com/pixiebrix/webext-messenger/pull/199

## Report

- https://github.com/parcel-bundler/parcel/issues/9071

## Fix

```diff
- "demo:build": "parcel build --no-cache",
+ "demo:build": "parcel build --no-cache --no-scope-hoist",
```