[Bug]: Documentation provides invalid configuration for splitChunks.cacheGroups

[Bilge]

System Info

  System:
    OS: Linux 5.15 Ubuntu 20.04.3 LTS (Focal Fossa)
    CPU: (8) x64 Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
    Memory: 8.62 GB / 11.69 GB
    Container: Yes
    Shell: 5.0.17 - /bin/bash
  Binaries:
    Node: 22.12.0 - /run/user/1000/fnm_multishells/106225_1736510454054/bin/node
    Yarn: 1.22.22 - /run/user/1000/fnm_multishells/106225_1736510454054/bin/yarn
    npm: 10.9.0 - /run/user/1000/fnm_multishells/106225_1736510454054/bin/npm
    pnpm: 10.0.0 - ~/.local/share/pnpm/pnpm
  npmPackages:
    @rspack/cli: ^1.1.8 => 1.1.8
    @rspack/core: ^1.1.8 => 1.1.8

Details

module.exports = {
  optimization: {
    splitChunks: {
      cacheGroups: {
        test: /\/some-lib\//,
        name: 'lib',
      },
    },
  },
};

[rspack-cli] [Error:   × TypeError: Method RegExp.prototype.test called on incompatible receiver undefined
  │     at test (<anonymous>)
  │     at /home/php/Club 250/node_modules/.pnpm/@[email protected]/node_modules/@rspack/core/dist/index.js:12370:16
  │ 
] {
  code: 'GenericFailure'
}
 ELIFECYCLE  Command failed with exit code 2.

Reproduce link

https://rspack.dev/guide/optimization/code-splitting#force-the-splitting-of-certain-modules

Reproduce Steps

Follow documentation for Force the splitting of certain modules.

[Bilge]

It seems the content of cacheGroups must be wrapped in an object with a key of arbitrary name.

[JSerFeng]

Thanks, would you be willing to fix ?

[Bilge]

@JSerFeng I cannot currently use rspack because of #8992. If that is fixed then I would be willing to amend the documentation 👍🏻