v7.6.0+ supresses Webpack errors on electron-forge start when not using DEBUG flag

[kurbar]

Pre-flight checklist

• I have read the contribution documentation for this project.
• I agree to follow the code of conduct that this project uses.
• I have searched the issue tracker for a bug that matches the one I want to file, without success.

Forge version

7.7.0

Electron version

34.3.0

Operating system

macOS 15.3.1

Last known working Forge version

7.5.0

Expected behavior

electron-forge start displays any Webpack errors that prevent the command from succeeding.

Actual behavior

electron-forge start silently exits with non-zero exit code.

Steps to reproduce

1. Create a new Forge app with e.g. npx create-electron-app@latest test-app --template=webpack-typescript
2. Easiest test for me was to reserve port 9000 (logger) for something. E.g. mkdir -p ~/tmp-http && npx http-server -p 9000 ~/tmp-http. Or you can set loggerPort in forge.config.ts WebpackPlugin to a known in-use port.
3. Try to run electron-forge start or npm start.

Additional information

When using DEBUG=electron-forge:*, then the errors do show up but seems like an unnecessary hassle for development. Especially when migrating from v7.5.0