[Bug]: css syntax lowering functionality fails when builtin:lightningcss-loader + css-loader + postcss-loader are used together #7798
Description
System Info
System:
OS: macOS 13.4
CPU: (12) arm64 Apple M2 Pro
Memory: 216.27 MB / 32.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 16.20.2 - ~/.nvm/versions/node/v16.20.2/bin/node
Yarn: 1.22.19 - ~/.nvm/versions/node/v16.20.2/bin/yarn
npm: 8.19.4 - ~/.nvm/versions/node/v16.20.2/bin/npm
pnpm: 8.15.8 - ~/Library/pnpm/pnpm
bun: 1.0.25 - ~/.bun/bin/bun
Watchman: 2023.08.28.00 - /opt/homebrew/bin/watchman
Browsers:
Safari: 16.5
Details
启用 postcss-loader 后 css 降级功能不生效 （css degradation does not work when postcss-loader is enabled）
启用 (enabled)
关闭 (disable)
配置 (rspack config)
Reproduce link
No response
Reproduce Steps
rspack-project.zip 最小复现
pnpm install
pnpm build