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• I have tried restarting my IDE and the issue persists.
• I have updated to the latest version of the packages.
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Issue Description

I'm getting this error under eslint@9.12.0, which did not occur under eslint@9.11.1:

/wherever/vitest.config.ts
  0:0  error  Parsing error: /wherever/vitest.config.ts was not found by the project service. 
Consider either including it in the tsconfig.json or including it in allowDefaultProject

The pertinent config is:

  {
    files: ['*.ts', '{src,db}/**/*.ts'],
    extends: [...ts.configs.recommendedTypeChecked],
    languageOptions: {
      parserOptions: {
        projectService: {
          allowDefaultProject: ['vitest.config.ts'],
        },
        tsconfigRootDir: import.meta.dirname,
      },
    },
  },
  {
    files: ['db/**/*.ts'],
    languageOptions: {
      parserOptions: {
        projectService: true,
        tsconfigRootDir: import.meta.dirname + '/db',
      },
    },
  },

The problem disappears if any of these are changed:

• eslint is downgraded to lower version
• the last block (with files: ['db/**/*.ts']) is removed
• the first block is changed to not overlap with the second (i.e., files: ['*.ts', 'src/**/*.ts'])

Reproduction Repository Link

https://github.com/LukeNotable/eslint-9.12.0-allow-default-project-bug

Repro Steps

1. clone the repo
2. yarn install
3. yarn eslint .

Versions