[Bug]: CSS empty selector will cause Postcss parsing error: Error: Unsupported previous source map format: [object Object]

[yArna]

Version

System:
OS: macOS 14.5
CPU: (11) arm64 Apple M3 Pro
Memory: 112.67 MB / 36.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 20.12.1 - /usr/local/bin/node
Yarn: 1.22.21 - ~/.npm-global/bin/yarn
npm: 10.5.0 - /usr/local/bin/npm
pnpm: 9.1.3 - ~/.npm-global/bin/pnpm
bun: 1.1.12 - ~/.bun/bin/bun
Browsers:
Chrome: 127.0.6533.90
Chrome Canary: 129.0.6644.0
Edge: 127.0.2651.86
Safari: 17.5

Details

If the style of the vue file is an empty selector, rsbuild dev will fail, but rsbuild build will succeed

<style >
body {
}
</style>

start   Compiling...
error   Compile error: 
Failed to compile, check the errors for troubleshooting.
File: /Users/xxxx/Test/rsbuild/packages/a-project/src/App.vue?vue&type=style&index=0&id=7ba5bd90&lang=css:1:1
  × Module build failed:
  ╰─▶   × Error: HookWebpackError:   × Module build failed:
        │   ╰─▶   × Error: Unsupported previous source map format: [object Object]
        │         │     at PreviousMap.loadMap (/Users/xxxx/Test/rsbuild/node_modules/.pnpm/postcss@8.4.41/node_modules/postcss/lib/previous-map.js:117:15)
        │         │     at new PreviousMap (/Users/xxxx/Test/rsbuild/node_modules/.pnpm/postcss@8.4.41/node_modules/postcss/lib/previous-map.js:23:21)
        │         │     at new Input (/Users/xxxx/Test/rsbuild/node_modules/.pnpm/postcss@8.4.41/node_modules/postcss/lib/input.js:49:17)
        │         │     at parse (/Users/xxxx/Test/rsbuild/node_modules/.pnpm/postcss@8.4.41/node_modules/postcss/lib/parse.js:8:15)
        │         │     at new LazyResult (/Users/xxxx/Test/rsbuild/node_modules/.pnpm/postcss@8.4.41/node_modules/postcss/lib/lazy-result.js:133:16)
        │         │     at Processor.process (/Users/xxxx/Test/rsbuild/node_modules/.pnpm/postcss@8.4.41/node_modules/postcss/lib/processor.js:53:14)

Reproduce link

https://github.com/yArna/bug-rsbuild/tree/main

Reproduce Steps

$ cd packages/a-project
$ npm run dev

[chenjiahan]

Fixed in the latest release, see:

• [Bug]: Versions v1.0.1-beta.7 and later broke the compilation of commented-out or empty Vue <style> tags. rspack#7438
• https://github.com/web-infra-dev/rsbuild/releases/tag/v1.0.1-beta.11

[yArna]

Very happy that the problem has been solved