LightningcssLoader is set to false, but the production build still prompts an error

[iwtem]

从 0.7 升级到 1.0 之后，本地开发正常，生产打包一直报错，以为是 lightningcss 的问题，设置了 tools.lightningcssLoader 为 false 后仍然报一样的错误：

> RUST_BACKTRACE=full rsbuild build
  Rsbuild v1.0.7

Panic occurred at runtime. Please file an issue on GitHub with the backtrace below: https://github.com/web-infra-dev/rspack/issues
Message:  internal error: entered unreachable code
Location: index.crates.io-6f17d22bba15001f/lightningcss-1.0.0-alpha.58/src/values/color.rs:3225
Run with COLORBT_SHOW_HIDDEN=1 environment variable to disable frame filtering.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ BACKTRACE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 1: _napi_register_module_v1
    at <unknown source file>
 2: _napi_register_module_v1
    at <unknown source file>
 3: _napi_register_module_v1
    at <unknown source file>
 4: _napi_register_module_v1
    at <unknown source file>
 5: _wasmer_vm_f64_nearest
    at <unknown source file>
 6: _wasmer_vm_f64_nearest
    at <unknown source file>
 7: _blake3_compress_in_place_portable
    at <unknown source file>
 8: _blake3_compress_in_place_portable
    at <unknown source file>
 9: _blake3_compress_in_place_portable
    at <unknown source file>
10: _blake3_compress_in_place_portable
    at <unknown source file>
11: _blake3_compress_in_place_portable
    at <unknown source file>
12: _blake3_compress_in_place_portable
    at <unknown source file>
13: _blake3_compress_in_place_portable
    at <unknown source file>
14: _blake3_compress_in_place_portable
    at <unknown source file>
15: _blake3_compress_in_place_portable
    at <unknown source file>
16: _napi_register_module_v1
    at <unknown source file>
17: _napi_register_module_v1
    at <unknown source file>
18: _napi_register_module_v1
    at <unknown source file>
19: _napi_register_module_v1
    at <unknown source file>
20: _napi_register_module_v1
    at <unknown source file>
21: _napi_register_module_v1
    at <unknown source file>
22: _napi_register_module_v1
    at <unknown source file>
23: _napi_register_module_v1
    at <unknown source file>
24: _napi_register_module_v1
    at <unknown source file>
25: _napi_register_module_v1
    at <unknown source file>
26: _napi_register_module_v1
    at <unknown source file>
27: _napi_register_module_v1
    at <unknown source file>
28: _wasmer_vm_f64_nearest
    at <unknown source file>
29: _napi_register_module_v1
    at <unknown source file>
30: _napi_register_module_v1
    at <unknown source file>
31: _napi_register_module_v1
    at <unknown source file>
32: __pthread_deallocate
    at <unknown source file>
 ELIFECYCLE  Command failed.

[9aoy]

Lightningcss is used in Rsbuild not only to transform CSS code, but also to minify CSS. you can use @rsbuild/plugin-css-minimizer to switch the CSS minifier from Lightning CSS to cssnano or another CSS minifier.

see https://rsbuild.dev/guide/basic/css-usage#disabling-lightning-css

[iwtem]

发现把 output.copy 这个配置去掉,就可以正常打包成功

[iwtem]

具体原因是 public 目录下放了一个 css 文件，css 文件可能存在语法不正确，导致 build 一直失败。但是 public 不是不经过编译吗，支持 copy 过去，不知道为什么一直 build 失败。

[chenjiahan]

Can you provide a minimal reproduction?

[iwtem]

Can you provide a minimal reproduction?

看这个：https://github.com/web-infra-dev/rsbuild/issues/3594