Picomatch: Expected pattern to be a non-empty string

[felixranesberger]

Describe the bug

After updating to v0.9.0 I get the following error:

Reproduction

Config:

 checker({
        root: process.cwd(),
        overlay: {
          initialIsOpen: false,
        },
        // activate typescript type checking only if the entry file is a typescript file
        typescript: configurationBase.entry.endsWith('.ts'),
        eslint: {
          lintCommand: `eslint -c ./${configurationBase.eslint} .`,
          useFlatConfig: true,
        },
        stylelint: {
          lintCommand: `stylelint -c ./${configurationBase.stylelint} ${resolvePath(configurationBase.entryDir)}/**/*.{css,scss,sass,less}`,
        },
      }),

Expected behavior

.

System Info

.

Additional context

No response

Validations

• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.

[tryforceful]

I also get this error. It seems to be generated from the eslint configuration, specifically when I specify . as the source files location...

E.g. this causes the error and crash:

eslint: {
    lintCommand: 'eslint .',
    useFlatConfig: true,
  },

But this is OK (linting only in a sub directory):

eslint: {
    lintCommand: 'eslint src',
    useFlatConfig: true,
  },

EDIT

It seems specifying **/* instead of . could be a temporary solution?

[thomasoehri]

I'm also getting this error and @tryforceful's workaround seems to work for now.