[Bug]: Error while using "externals" with "asyncWebAssemly"

[sunflowerdeath]

System Info

System:
OS: macOS 14.3
CPU: (8) arm64 Apple M1
Memory: 35.11 MB / 8.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 23.3.0 - ~/.nvm/versions/node/v23.3.0/bin/node
Yarn: 3.3.0 - ~/.nvm/versions/node/v23.3.0/bin/yarn
npm: 10.9.0 - ~/.nvm/versions/node/v23.3.0/bin/npm
pnpm: 7.16.1 - ~/.nvm/versions/node/v23.3.0/bin/pnpm
Browsers:
Chrome: 131.0.6778.109
Safari: 17.3

Details

Hello, I have encountered an error while building a project with Rspack.

I have reduced it down to the following configuration - workspace project that has two packages:

• "a" is a main package, that imports library "b".
• "b" is a library, which uses dependency marked as "external" and also requires asyncWebAssemly: true

I mage a repo that reproduces this bug.

Reproduce link

https://github.com/sunflowerdeath/rspack-wasm-externals-bug

Reproduce Steps

1. Install deps: npm install
2. Build library: cd b && npm run build
3. Build main package: cd a && npm run build
4. Go to http://localhost:8080 . You should see an error in console.

If you instead run npm run build-webpack in package a, you will not see an error in console and will see an output of the function.
Also if you run npm run serve which starts devServer, it also works correctly.