System Info

System:
OS: macOS 14.7
CPU: (8) arm64 Apple M2
Memory: 90.69 MB / 24.00 GB
Shell: 3.2.57 - /bin/bash
Binaries:
Node: 22.14.0 - ~/.nodebrew/current/bin/node
Yarn: 1.22.22 - /opt/homebrew/bin/yarn
npm: 10.9.2 - ~/.nodebrew/current/bin/npm
pnpm: 8.15.3 - ~/.nodebrew/current/bin/pnpm
Browsers:
Chrome: 134.0.6998.89
Chrome Canary: 136.0.7072.0
Edge: 134.0.3124.68
Safari: 18.0
npmPackages:
@rspack/cli: ^1.2.8 => 1.2.8
@rspack/core: ^1.2.8 => 1.2.8

Details

Build hangs on error when setting api: "modern-compiler" in sass-loader.
In webpack, the process exits when an error occurs.
Removing the following setting allows the process to exit in rspack as well:

{
  loader: "sass-loader",
  options: {
-    api: "modern-compiler",
     implementation: require("sass-embedded"),
  }
}

Reproduce link

https://github.com/Thiry1/rspack-bug-repro/compare/hang-sass-loader

Reproduce Steps

1. clone repro repo
2. git switch hang-sass-loader
3. npm i
4. npm run build:rspack